The Potash in the News Is Not the Potash in Your Drum
Table of Contents
📋 What You'll Learn
This guide walks you through the potash in the news is not the potash in your drum with detailed instructions.
On Monday 21 September 2026 the US president posted that the United States is “working on a massive deal with respect to the purchase of Potash from Belarus,” at pricing “substantially less than we are currently paying to Canada.” Within hours the president of Belarus, receiving a report from his customs chief, said the opposite: “Even if we wanted to supply potash to other, Western markets, we simply do not have those volumes — everything is contracted.” By Wednesday the story had reached the national business pages, and a first cargo of 30,000 tonnes was being reported for the port of New Orleans in October.
If you buy caustic potash, somebody has probably already asked what this does to your price. The honest answer is: very little, and not for the reason the headlines suggest. The link between a fertilizer cargo and a drum of potassium hydroxide is real; it just runs through Saskatchewan rather than Minsk, and it is written in molar masses rather than press releases. This article lays out the sequence of events, the three chemicals that share one word, where the salt comes from, and the arithmetic that decides whether any of it reaches an industrial invoice.
It is a market-structure piece. It takes no view on the trade decisions involved, it is not a recommendation to buy or sell anything on a schedule, and every figure is from a government series, a court-of-record filing or a named news report, listed at the end.
What happened, in order
The sequence matters because most of it happened before September. The trade restrictions on Belarusian potash were being unwound for nine months; what changed this week was a public claim about price, and a public reply about volume.
| When | What happened |
|---|---|
| December 2025 | The US Treasury’s Office of Foreign Assets Control issues General License 13, authorizing certain transactions with Belaruskali, the Belarusian Potash Company and Agrorozkvit. Belarus produced about a fifth of the world’s potash before restrictions were imposed in 2021–22. |
| 26 March 2026 | OFAC removes the three potash entities from the Specially Designated Nationals list outright. European Union and United Kingdom listings, including the EU import ban on Belarusian potassium fertilizers, stay in force. |
| 11 September 2026 | Belarus’s president says his country has resumed selling potash to American customers, and complains that $43–44 million of Belarusian funds are held up at a US bank. |
| 21 September 2026 | The US president posts that a “massive deal” is in the works at “substantially less” than Canadian pricing. Hours later, in a meeting with the chairman of his State Customs Committee, Belarus’s president says the year’s output “is already contracted” and there are no volumes for Western markets. |
| 22 September 2026 | The farm press picks up the contradiction. Fertilizer analyst Josh Linville, quoted by Michigan Farm News, describes potash as “extremely well priced and steady,” with potash-to-corn ratios “in the lowest 20% of the past year.” |
| October 2026 (expected) | A first vessel carrying about 30,000 tonnes of Belarusian muriate of potash is reported for New Orleans — the first physical confirmation of resumed trade, and the first such arrival in four years. |
Read the table for what it does not contain: no plant outage, no route closure, no export ban, no price spike. What there is, is a change in who is allowed to sell into the United States and a public disagreement about the terms. That is a trade-policy event, and trade policy reaches caustic potash late and indirectly.
Three chemicals share one word
Before the supply chain, the vocabulary, because it is the source of most of the confusion. “Potash” is not a compound. The US Geological Survey’s definition is the cleanest one available: potash “denotes a variety of mined and manufactured salts that contain the element potassium in water-soluble form,” and in agriculture it means potassium chloride, potassium sulfate and potassium magnesium sulfate. Industry uses the same word for something else again.
| What people call it | What it is | Where it comes from | Who buys it |
|---|---|---|---|
| Potash, pot ash, pearl ash | Potassium carbonate, K2CO3, CAS 584-08-7 | Historically leached from wood ash; today made from potassium hydroxide and carbon dioxide | Glass, specialty chemicals |
| Potash, muriate of potash, MOP | Potassium chloride, KCl, CAS 7447-40-7, sold as a 95%-plus KCl and sodium chloride mix graded by K2O content | Mined from sylvinite beds and brines: Saskatchewan, the Urals, Belarus, New Mexico, Utah | Fertilizer, about 85% of US sales; the rest chemical and industrial |
| Caustic potash, KOH, liquid potash | Potassium hydroxide, KOH, CAS 1310-58-3, a strong base sold as 90% flake or 25–50% solution | Made by electrolysis of potassium chloride brine in a chlor-alkali cell | Chemical manufacture, potassium salts, biodiesel catalyst, alkaline batteries and electrolyzers, liquid soaps, water treatment |
The cargo bound for New Orleans is the second row. Everything Alliance Chemical sells under the word is the third. The first row is where the word came from, and the story of how a wood-ash kettle became the subject of the very first US patent is told in our evergreen potash article; this piece is the September 2026 update to it.
The one-sentence version. Fertilizer potash is the raw material; caustic potash is the product made from it; and the only way a fertilizer headline reaches an industrial drum is through the price of the potassium chloride that goes into the cell.
Where US potash actually comes from
The United States is not short of potassium in the ground. USGS puts domestic resources at about 7 billion tonnes, most of it under Montana and North Dakota as the southern extension of the same Williston Basin deposits that Saskatchewan mines. It is short of potassium at the surface: domestic production in 2025 was about 500,000 tonnes of K2O equivalent, from two underground mines and a solution mine in southeastern New Mexico and three facilities in Utah, against imports of about 5.6 million tonnes. That is a net import reliance of 92%.
The import mix is the part that matters for the rest of this article. Over 2021 to 2024 Canada supplied 79% of US potash imports, Russia 12%, Israel 3% and everyone else 6% combined. Nearly all of the Canadian material comes from Saskatchewan. The Canadian Press, reporting on this week’s exchange, put the figure at 80% and noted that almost half of Canada’s potash exports, worth about $4.2 billion, go to the United States.
| Country | 2025 mine production, thousand tonnes K2O (estimate) | Reserves, thousand tonnes K2O | Note |
|---|---|---|---|
| Canada | 15,000 | 1,100,000 | 79% of US imports, 2021–24; essentially all from Saskatchewan |
| Russia | 10,000 | 2,000,000 | 12% of US imports |
| Belarus | 6,000 | 750,000 | Landlocked; since the loss of Baltic port access, exports move by Russian rail, mainly to St Petersburg |
| China | 6,300 | 200,000 | Consumed domestically |
| United States | 500 | 220,000 | New Mexico and Utah; more than 60% of output is the sulfate forms, not muriate |
| World | 49,000 | >5,900,000 | Capacity 66.1 million tonnes in 2025, projected 77.4 million by 2029 |
Now put the cargo against that. Muriate of potash is graded by its potassium oxide equivalent, and standard fertilizer MOP runs at about 60% K2O. A 30,000-tonne cargo is therefore about 18,000 tonnes of K2O, or roughly 0.3% of a year’s US imports — less than a day and a half of the country’s intake. Whatever the deal grows into, the first ship is a signal, not a supply event. And the Belarusian side’s own statement is that there are no uncontracted volumes to grow it with this year.
The logistics bear on the price claim. Before 2022 most Belarusian potash left through Klaipeda in Lithuania; that route closed with the European restrictions, and the material now moves by Russian rail to St Petersburg before it finds a ship. A landlocked producer routing through a third country’s port, across the Atlantic and up the Mississippi is not an obvious low-cost supplier against an incumbent that ships by rail from the neighboring province, and the farm-press description of potash as “extremely well priced and steady” is not a market paying a scarcity premium.
How caustic potash is made from the fertilizer salt
Potassium hydroxide is a chlor-alkali product. It is made the same way as sodium hydroxide, by passing a direct current through a brine, except that the brine is potassium chloride rather than common salt. The EPA’s supply-chain profile for the chemical states the process in one equation:
The cell produces a caustic potash solution that is evaporated to the 45 to 50% commercial strength, and with more energy to the 90% flake that ships in bags. Both forms trace back to the same potassium chloride, and that potassium chloride is a purer cut of the same mineral that the fertilizer trade calls muriate of potash. The same EPA document is unusually direct about where it comes from: the raw material supply “is largely import-dependent, and primarily from one geographic region (Saskatchewan, Canada).”
Two structural features of the potassium side of chlor-alkali follow from that.
First, the run rate is set by hydroxide demand, not chlorine demand. On the sodium side, producers run their cells to the chlorine market and caustic soda is the coproduct that has to find a home, which is why caustic soda prices can move opposite to demand for caustic soda. On the potassium side, the EPA notes, “demand for potassium hydroxide derivative chemicals tends to set demand for chlor-alkali production using potassium chloride as a raw material.” Caustic potash is the product; chlorine is the coproduct. That makes its price more directly responsive to its own feedstock.
Second, production is concentrated. The EPA profile records that the direct landfall of Hurricane Ida in Louisiana in August 2021 “resulted in a temporary closure of the largest domestic production facility in Louisiana, causing a temporary loss of significant production capacity.” A market with one dominant plant and one dominant feedstock region is a market where the feedstock price and the feedstock route both matter.
The salt arithmetic
This is the section to keep. It explains why a potash headline can reach a potassium hydroxide invoice when an identical salt headline would never reach a sodium hydroxide one, and it needs nothing more than two molar masses and two USGS unit values.
The stoichiometry is fixed. One mole of potassium chloride, 74.55 grams, gives one mole of potassium hydroxide, 56.11 grams, so a tonne of KOH needs about 1.33 tonnes of KCl. One mole of sodium chloride, 58.44 grams, gives one mole of sodium hydroxide, 40.00 grams, so a tonne of NaOH needs about 1.46 tonnes of salt. So far the two look alike: both need a bit more than a tonne of salt per tonne of hydroxide.
The prices are not alike at all. USGS’s 2026 commodity summary puts the average 2025 value of rock salt at $54 a tonne, free on board the mine. The same series puts muriate of potash at $600 a tonne of K2O equivalent, which at 60% K2O is about $360 a tonne of product. Multiply through:
| Product | Feedstock | Tonnes of feedstock per tonne of product | 2025 USGS unit value of feedstock | Feedstock cost per tonne of product |
|---|---|---|---|---|
| Sodium hydroxide (caustic soda) | Sodium chloride, rock salt | 1.46 | $54 / t | about $79 |
| Potassium hydroxide (caustic potash) | Potassium chloride, muriate of potash basis | 1.33 | $360 / t of product ($600 / t K2O) | about $480 |
Six times the feedstock bill, per tonne of product, at fertilizer-grade benchmark prices — and chlor-alkali cells run on a purer potassium chloride than the fertilizer benchmark, so treat the $480 as a floor rather than a ceiling. For caustic soda, the salt is a rounding error next to the electricity; for caustic potash, the salt is a large share of the cost of goods. That is the whole mechanism. When potassium chloride moves, potassium hydroxide producers feel it in a way sodium hydroxide producers never feel a salt price.
There is a recent precedent, and USGS recorded it. The average US mine value of muriate of potash went from $650 a tonne of K2O in 2021 to $980 in 2022, then back to $620 in 2023, as the fertilizer trade reorganized itself around the Belarusian and Russian restrictions. The EPA’s profile, written in 2023, notes the consequence for the chemical: “In 2022, reductions in worldwide supply of the primary raw material, potassium chloride, have led to significant price increases for this raw material on the international market.” That is the year to look at if you want to know what a potash event does to a potassium hydroxide buyer. The 2026 event, so far, is the reverse: a restriction being lifted into a well-supplied market.
Caustic potash inherits potash politics. Caustic soda mostly does not. The fertilizer trade’s tariffs, sanctions and shipping routes flow into the potassium hydroxide price through 1.33 tonnes of feedstock. The same events leave the sodium hydroxide price alone, because a tonne of salt costs less than a tonne of potash by a factor of six or seven.
What to actually watch
Not the Belarus cargo. Thirty thousand tonnes into a 5.6-million-tonne import market, from a seller who says the rest of the year is contracted, does not move the feedstock price in either direction, and the physical market is already described by its own analysts as steady. If the deal grows, it grows into the fertilizer channel first and the chemical channel later, by the arithmetic above.
The variable that would move caustic potash is a duty on Saskatchewan potassium chloride. As of the USGS tariff schedule dated 31 December 2025, potassium chloride enters the United States at a normal-trade-relations rate of Free in both K2O bands, and on 7 November 2025 potash was added to the final US List of Critical Minerals for the first time, alongside copper, silver and silicon. Those two facts describe a feedstock that policy currently regards as something to keep flowing. Any change to either — a duty applied, or an exemption withdrawn — would reach the potassium hydroxide cell through the same 1.33 tonnes that the fertilizer market prices every week.
The reading for a buyer is not “a cheaper source of potash is coming.” It is: the feedstock behind caustic potash is 79% sourced from one province, that province is at the center of a public trade argument, and the argument is about price, not physical supply. Follow the chloride, not the headline.
What this means on a specification
None of this changes which grade of potassium hydroxide you need. It changes which lines on the certificate deserve a second look when the feedstock market is in the news, because several of them are inherited directly from the potassium chloride.
| Application | What to specify | What actually moves the result |
|---|---|---|
| Biodiesel catalyst, potassium salt manufacture, general neutralization | Technical flake, KOH assay stated (nominally 90%), or a 25–45% technical solution if you dose by pump | Carbonate. Flake pulls carbon dioxide from air and potassium carbonate does not make methoxide or neutralize acid on the same schedule. Keep the bag sealed. |
| Alkaline electrolyzers, battery electrolyte | ACS reagent flake or 45% ACS solution | Chloride and iron. Both come in with the feedstock: residual KCl that the cell did not convert, and iron from the brine circuit. Ask for them on the certificate rather than assuming the assay covers them. |
| Liquid soap, cleaners, pH adjustment in water treatment | Technical solution at the strength that matches your dosing, usually 25% or 45% | Sodium content. Fertilizer-basis KCl carries sodium chloride; how much survives into the hydroxide is a purification question, and a buyer who needs a true potassium soap should see the sodium line. |
| Laboratory titration, analytical standards | ACS reagent grade, flake or 45% solution | Assay and carbonate together. A reagent specification sets both; a technical lot may pass the assay and fail on carbonate. |
Three practical points follow from the market rather than the chemistry.
First, separate the fertilizer price from the chemical price. If a supplier explains a caustic potash move “in line with potash,” ask whether they mean the fertilizer benchmark or their actual feedstock contract, and on what lag. A 1.33-to-1 ratio tells you the scale of the exposure; it does not tell you the timing, which depends on how far forward the producer bought its potassium chloride.
Second, chloride on the certificate matters more when the feedstock market is disturbed. Potassium hydroxide’s chloride content is the fingerprint of its origin. When producers change feedstock sources or run harder, the line that drifts is the one that comes in with the salt. Request the certificate of analysis for the lot you are receiving rather than the typical values on the data sheet.
Third, buy the strength you can dose. Flake is the cheapest way to move hydroxide and the most expensive way to store it, because it absorbs water and carbon dioxide from the moment the bag is opened; a 45% solution costs more per unit of KOH and arrives ready to pump. Neither should be bought ahead of need on the strength of a headline.
A word on what this article does not say. It describes where the world’s potassium chloride is mined, how potassium hydroxide is made from it, and where US government sources say that feedstock comes from. It makes no claim about ours — where the potassium hydroxide we list is manufactured, whose potassium chloride went into it, or how our own inventory position is affected by any of this. Nobody writing this has verified either, and a market-structure article is the wrong place to guess.
Common questions
Is the potash in the Belarus headlines the same thing as caustic potash?
No. The headlines are about potassium chloride, the fertilizer salt that the trade calls muriate of potash. Caustic potash is potassium hydroxide, a strong base made from potassium chloride by chlor-alkali electrolysis. They share a word and a mineral origin, and nothing else: different CAS numbers, different hazards, different buyers and different price sheets.
Will a Belarus potash deal lower the price of potassium hydroxide?
Not on the evidence so far. The first reported cargo is about 30,000 tonnes against US imports of roughly 5.6 million tonnes of K2O a year, the Belarusian side says its remaining 2026 output is already contracted, and the fertilizer market is described by its own analysts as well supplied and steady. Potassium hydroxide follows its feedstock with a lag through a 1.33-to-1 mass ratio, so a change of this size does not register.
Why does a potash price move affect potassium hydroxide but not sodium hydroxide?
Because of what the feedstock costs. A tonne of sodium hydroxide needs about 1.46 tonnes of rock salt at roughly $54 a tonne, about $79 of feedstock. A tonne of potassium hydroxide needs about 1.33 tonnes of potassium chloride at roughly $360 a tonne on a fertilizer basis, about $480 of feedstock. Salt is a rounding error in caustic soda; potassium chloride is a large share of the cost of caustic potash.
Where does the potassium chloride for US potassium hydroxide come from?
Mostly Canada. The US Environmental Protection Agency’s supply-chain profile says the raw material is “largely import-dependent, and primarily from one geographic region (Saskatchewan, Canada),” and USGS records Canada as the source of 79% of US potash imports from 2021 to 2024. Domestic mines in New Mexico and Utah supply about 8% of what the country uses, much of it in sulfate forms rather than the chloride that chlor-alkali cells run on.
What would actually move the caustic potash price?
A duty or restriction on Canadian potassium chloride, which the current US tariff schedule admits at a Free normal-trade-relations rate and which was added to the US List of Critical Minerals in November 2025. The 2022 episode is the precedent: USGS recorded muriate of potash rising from $650 to $980 a tonne of K2O in a year, and EPA recorded “significant price increases” in the feedstock for potassium hydroxide as a result.
Which lines on a potassium hydroxide certificate come from the feedstock?
Chloride, sodium and iron. Chloride is unconverted potassium chloride from the cell; sodium comes in with fertilizer-basis feedstock, a potassium chloride and sodium chloride mix; iron comes from the brine circuit. Assay is the producer’s responsibility and carbonate the handler’s. For electrolyzers, batteries and reagent work, ask for chloride and iron on the certificate for the lot you receive.
References & Authoritative Sources
Production, import, reserve and price figures are from the US Geological Survey; the potassium hydroxide process and feedstock statements are from the US Environmental Protection Agency; the trade-restriction timeline is from OFAC actions as reported by counsel; the September statements are from named news reports.
- Potash — Mineral Commodity Summaries 2026 (PDF) — US Geological Survey, February 2026. Definition of potash; 2025 production 500,000 t and imports 5.6 million t K2O; net import reliance 92%; import sources 2021–24; MOP unit value $650 (2021), $980 (2022), $620 (2023), $600 (2025e) per tonne K2O; world production and reserves; tariff schedule; critical minerals listing of 7 November 2025 (90 FR 50494).
- Salt — Mineral Commodity Summaries 2026 (PDF) — US Geological Survey, February 2026. Average 2025 unit value, f.o.b. mine and plant: rock salt $54 per tonne; vacuum and open pan $260; solar $150.
- Potassium Hydroxide Supply Chain Profile (PDF) — US Environmental Protection Agency, Water Sector Supply Chain Resilience, March 2023. The chlor-alkali equation; feedstock “largely import-dependent, and primarily from one geographic region (Saskatchewan, Canada)”; hydroxide demand sets KCl chlor-alkali run rates; the 2021 Hurricane Ida closure; the 2022 feedstock price increases.
- OFAC Lifts Belarus Sovereign Debt Ban, Eases Sanctions on Belarusian Potash Sector — Cleary Gottlieb, Foreign Investment and International Trade Watch, 7 April 2026. General License 13 (December 2025); SDN delisting of the three potash entities on 26 March 2026; EU and UK listings unchanged.
- Trump says he wants potash from Belarus for ‘substantially less’ than Canada — Global News, 21 September 2026. The full text of the 21 September post; USGS-sourced import shares; the Saskatchewan Mining Association on logistics.
- Trump says U.S. ‘hammering out’ potash deal with Belarus — The Canadian Press via Yahoo Finance Canada, 21 September 2026. Canada at 80% of US potash imports; nearly half of Canadian potash exports, about $4.2 billion, go to the United States.
- Lukashenko says Belarus has no spare potash fertilisers for proposed US deal — Ukrainska Pravda, 22 September 2026, citing the Belarusian presidential press service. “Even if we wanted to supply [potash fertilisers] to other, Western markets, we simply don’t have those volumes – everything has already been allocated under contracts.”
- No potash for US — Belarus contradicts claims of major potash deal — Michigan Farm News, 22 September 2026. Josh Linville on potash being “extremely well priced and steady” with potash-to-corn ratios “in the lowest 20% of the past year.”
- First vessel with Belarusian potash to arrive in USA in October — Nasha Niva, September 2026. About 30,000 tonnes of muriate of potash for New Orleans, the first US arrival in four years; the 11 September statement on resumed sales and the funds held at a US bank.
- Wider Europe Briefing: Will Belarus Potash Restrictions Be Dropped? — RFE/RL. Belarusian potash formerly shipped via Klaipeda; exports now move by Russian rail to St Petersburg; the EU import ban remains.
- Potash: The Chemical Behind America’s First Patent — and What It Became — Alliance Chemical. The evergreen potash article this update hangs from: the word, the history, and potash versus caustic potash versus muriate.
- Potassium Hydroxide (KOH): Uses, Grades and Safety — Alliance Chemical. Grades, handling and how KOH differs from sodium hydroxide.
The caustic potash we stock
Potassium Hydroxide (KOH) Technical Grade
The 90% flake for catalysts, salts and neutralization. 2 lb to 55 lb; keep the bag sealed against carbonate.
Potassium Hydroxide 45% Solution Technical Grade
Liquid caustic potash at the strength the cell makes it. Ready to pump; also listed at 25% and 30%.
Potassium Hydroxide Flakes ACS Grade
Reagent flake where chloride, iron and carbonate are specified, not just assay. Also as a 45% ACS solution.
Not sure whether your process needs technical or reagent grade, flake or liquid?
Tell us the application, the parameter you are measured against and how you dose it, and we will tell you whether technical flake does the job, whether a 45% solution saves you a dissolving step, or whether the reagent specification on chloride and iron is actually buying you something. That is the right answer, not the nearest thing in stock.
See every caustic potash grade and strengthKey numbers and sources
| Number | What it is | Source |
|---|---|---|
| 92% | US net import reliance for potash as a share of apparent consumption, 2025 estimate | USGS MCS 2026 |
| 79% / 12% / 3% / 6% | US potash import sources 2021–24: Canada, Russia, Israel, other | USGS MCS 2026 |
| 30,000 t ≈ 0.3% | First reported Belarusian cargo, as a share of annual US imports at 60% K2O | Nasha Niva; USGS arithmetic |
| 1.33 t / 1.46 t | Tonnes of KCl per tonne of KOH; tonnes of NaCl per tonne of NaOH | Stoichiometry (74.55/56.11; 58.44/40.00) |
| $480 vs $79 | Feedstock cost per tonne of KOH versus NaOH at 2025 USGS unit values (MOP $360/t product; rock salt $54/t) | USGS MCS 2026 potash and salt |
Frequently Asked Questions
Is the potash in the Belarus headlines the same thing as caustic potash?
No. The headlines are about potassium chloride, the fertilizer salt that the trade calls muriate of potash. Caustic potash is potassium hydroxide, a strong base made from potassium chloride by chlor-alkali electrolysis. They share a word and a mineral origin, and nothing else: different CAS numbers, different hazards, different buyers and different price sheets.
Will a Belarus potash deal lower the price of potassium hydroxide?
Not on the evidence so far. The first reported cargo is about 30,000 tonnes against US imports of roughly 5.6 million tonnes of K 2 O a year, the Belarusian side says its remaining 2026 output is already contracted, and the fertilizer market is described by its own analysts as well supplied and steady. Potassium hydroxide follows its feedstock with a lag through a 1.33-to-1 mass ratio, so a change of this size does not register.
Why does a potash price move affect potassium hydroxide but not sodium hydroxide?
Because of what the feedstock costs. A tonne of sodium hydroxide needs about 1.46 tonnes of rock salt at roughly $54 a tonne, about $79 of feedstock. A tonne of potassium hydroxide needs about 1.33 tonnes of potassium chloride at roughly $360 a tonne on a fertilizer basis, about $480 of feedstock. Salt is a rounding error in caustic soda; potassium chloride is a large share of the cost of caustic potash.
Where does the potassium chloride for US potassium hydroxide come from?
Mostly Canada. The US Environmental Protection Agency's supply-chain profile says the raw material is "largely import-dependent, and primarily from one geographic region (Saskatchewan, Canada)," and USGS records Canada as the source of 79% of US potash imports from 2021 to 2024. Domestic mines in New Mexico and Utah supply about 8% of what the country uses, much of it in sulfate forms rather than the chloride that chlor-alkali cells run on.
What would actually move the caustic potash price?
A duty or restriction on Canadian potassium chloride, which the current US tariff schedule admits at a Free normal-trade-relations rate and which was added to the US List of Critical Minerals in November 2025. The 2022 episode is the precedent: USGS recorded muriate of potash rising from $650 to $980 a tonne of K 2 O in a year, and EPA recorded "significant price increases" in the feedstock for potassium hydroxide as a result.
Which lines on a potassium hydroxide certificate come from the feedstock?
Chloride, sodium and iron. Chloride is unconverted potassium chloride from the cell; sodium comes in with fertilizer-basis feedstock, a potassium chloride and sodium chloride mix; iron comes from the brine circuit. Assay is the producer's responsibility and carbonate the handler's. For electrolyzers, batteries and reagent work, ask for chloride and iron on the certificate for the lot you receive.
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