Which Hydrogen Peroxide Concentration Should You Buy? All 8 Strengths, Priced
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💡 Frequently Asked Questions
Find quick answers to common questions about which hydrogen peroxide concentration should you buy? all 8 strengths, priced.
Ask for hydrogen peroxide and you will be handed a brown bottle of 3%. That is one rung of an eight-rung ladder. The same molecule is sold at 5%, 6%, 10%, 12%, 15%, 25% and 30%, and the difference between them is not strength in any mystical sense — it is simply how much water is in the jug. Understanding that one fact changes what you buy, what you pay, and how carefully you have to handle it.
What hydrogen peroxide concentrations can you actually buy?
Alliance Chemical stocks eight concentrations of hydrogen peroxide: 3%, 5%, 6%, 10%, 12%, 15%, 25% and 30%. Every strength from 5% upward is available in both Technical Grade and ACS Reagent Grade; 3% is offered in Technical Grade. Retail pharmacies typically carry only 3%, which is why most people assume that is what hydrogen peroxide is.
The practical consequence: if a job calls for 12%, you do not need to hunt for a specialty product. You either buy 12% directly or dilute a stronger jug down to it.
| Concentration | Grades stocked | Typical use | Handling |
|---|---|---|---|
| 3% | Technical Grade | Ready to use straight from the jug. The mildest rung of the ladder: light stain work on fabric and grout, and general wipe-downs. Technical Grade, not a drug-labelled antiseptic. | Gloves advised |
| 5% | Technical Grade · ACS Reagent Grade | A modest step up that still needs no dilution for most tasks. Common in laboratory rinses and light bleaching where 3% works too slowly. | Gloves advised |
| 6% | Technical Grade · ACS Reagent Grade | The classic hair-and-textile bleaching strength (20 volume). Also used for grout brightening and as a feedstock for making your own 3% at half the shipping weight. | Gloves advised |
| 10% | Technical Grade · ACS Reagent Grade | Where dilution starts paying for itself. One gallon makes roughly three gallons of 3%. Used in textile prep, laboratory cleaning and odour work. | Gloves + eye protection |
| 12% | Technical Grade · ACS Reagent Grade | Our top-selling concentration by revenue. Strong enough for laundry brightening, carpet and upholstery stain lifting, and organic-residue breakdown on hard surfaces. | Gloves + eye protection |
| 15% | Technical Grade · ACS Reagent Grade | A quiet value rung: same price per gallon as 10% and 12% in Technical Grade, so it delivers more active oxygen for the same money. | Gloves + eye protection |
| 25% | Technical Grade · ACS Reagent Grade | Bulk-dilution territory. Handled with full PPE and diluted down before use. One gallon yields roughly eight gallons of 3%. | Gloves, splash goggles, apron — corrosive |
| 30% | Technical Grade · ACS Reagent Grade | Industrial and laboratory oxidiser. Always diluted before surface use. This is the strength that etches, oxidises and drives reactions, not a cleaning product you spray. | Gloves, splash goggles, apron — corrosive |
CAS Number: 7722-84-1 — the same for every concentration on this page. Concentration is not a different chemical; it is a different amount of water.
What percentage of hydrogen peroxide should you use for cleaning?
For general household cleaning, 3% is the concentration to reach for, and it needs no dilution. For laundry brightening, grout and heavier organic staining, 6% to 12% does the work faster. Concentrations above 15% are not cleaning products — they are concentrates you dilute down before the liquid ever touches a surface.
Hydrogen peroxide cleans by oxidation. It breaks apart the coloured, carbon-based molecules that make a stain visible, then decomposes into water and oxygen, which is why it leaves no residue to rinse. A higher concentration does not oxidise differently; it simply carries more oxidiser per millilitre, so it acts faster and goes further once diluted.
| Task | Working strength | Buy this |
|---|---|---|
| General surface wipe-down | 3% | 3% Technical, ready to use |
| Fabric and grout stain lifting | 3–6% | 6% diluted 1:1, or 3% neat |
| Laundry brightening | 6–12% | 12% Technical, dosed per load |
| Carpet and upholstery stains | 6–12% | 12% diluted to taste on a test patch |
| Odour and organic residue on hard surfaces | 10–12% | 12% Technical |
| Textile and fibre bleaching | 6–15% | 15% Technical (best value per gallon) |
| Laboratory and process oxidation | 25–30% | 30% ACS Reagent Grade |
| Bulk dilution stock | 25–30% | 25% or 30%, diluted on site |
Never mix hydrogen peroxide and vinegar in the same container. Combining them produces peracetic acid, a far more aggressive and corrosive compound whose vapour irritates the eyes and airway. Used one after the other with a rinse between is a different matter entirely — it is the mixing and storing that creates the hazard.
What is 3% hydrogen peroxide used for?
3% hydrogen peroxide is the ready-to-use strength: it needs no dilution and is the mildest rung of the ladder. It lifts fresh organic stains from fabric, brightens grout, and handles general surface cleaning.
The 3% in a pharmacy is not the same product as the 3% here. Drugstore peroxide is a USP drug-labelled antiseptic, regulated and sold for first-aid use. Our 3% is Technical Grade, intended for cleaning, processing and manufacturing — same molecule and same concentration, different product classification. Do not substitute one for the other.
Its limitation is speed and economy. Because 97% of what you are buying, storing and shipping is water, 3% is by a wide margin the most expensive way to buy hydrogen peroxide per unit of active oxygen — the arithmetic is below.
What is 6% to 12% hydrogen peroxide used for?
The 6% to 12% band is the working range for serious stain and residue work. 6% is the traditional “20 volume” strength used for hair and textile bleaching. 12% is our top-selling concentration by revenue: strong enough to brighten laundry, lift set-in carpet stains and break down organic films on hard surfaces, while still being dilutable to 3% at a four-to-one ratio.
10%, 12% and 15% sit in an unusual spot in our pricing, which the cost section below unpacks.
What is 30% hydrogen peroxide used for?
30% hydrogen peroxide is an industrial and laboratory oxidiser, not a cleaning product you spray on a counter. It is used to drive chemical reactions, oxidise organic contaminants in process streams, prepare surfaces in electronics and metal finishing, and as concentrated stock that is diluted on site to whatever working strength a process needs.
30% causes immediate, severe chemical burns. Skin contact produces painful white blanching within seconds; eye contact can cause permanent damage. Handle only with chemical-resistant gloves, splash goggles and an apron, over a surface you can flood with water. Concentrated peroxide also decomposes with heat and contamination, so it is stored cool, upright and vented, and never returned to its original container once poured.
How do you dilute hydrogen peroxide to a lower concentration?
Use C1V1 = C2V2: the concentration you have times the volume you take equals the concentration you want times the volume you end up with. Rearranged for the part you actually need — how much concentrate to measure out — it is V1 = (C2 × V2) ÷ C1.
A worked example: to make 1 litre of 3% from 30% stock, V1 = (3 × 1000) ÷ 30 = 100 mL of 30%, topped up to 1000 mL with distilled water. That is one part concentrate to nine parts water.
Always add the peroxide to the water, not the water to the peroxide, and use distilled or deionised water. Trace metal ions in tap water catalyse decomposition, so a batch mixed with hard water loses strength noticeably faster on the shelf.
| Starting concentration | To make 3% | To make 6% | To make 12% | Gallons of 3% per gallon |
|---|---|---|---|---|
| 6% | 1 : 1 | — | — | 2.00 |
| 10% | 1 : 2.33 | 1 : 0.67 | — | 3.33 |
| 12% | 1 : 3 | 1 : 1 | — | 4.00 |
| 15% | 1 : 4 | 1 : 1.5 | 1 : 0.25 | 5.00 |
| 25% | 1 : 7.33 | 1 : 3.17 | 1 : 1.08 | 8.33 |
| 30% | 1 : 9 | 1 : 4 | 1 : 1.5 | 10.00 |
Ratios are parts concentrate to parts water by volume. For a strength not listed here, our hydrogen peroxide dilution calculator does the arithmetic for any pair of concentrations.
Which costs less — buying 3%, or diluting a stronger concentration?
Diluting a stronger concentration costs dramatically less per unit of active oxygen, because at low concentrations you are paying to buy, package and freight water. The table below divides the live price of a one-gallon jug of each Technical Grade concentration by the actual amount of hydrogen peroxide in it.
| Concentration | 1 gallon, Technical Grade | Active H2O2 per gallon | Cost per gallon of active H2O2 |
|---|---|---|---|
| 3% | $20.95 | 0.03 gal | $698.33 |
| 5% | $22.80 | 0.05 gal | $456.00 |
| 6% | $24.80 | 0.06 gal | $413.33 |
| 10% | $20.60 | 0.10 gal | $206.00 |
| 12% | $20.60 | 0.12 gal | $171.67 |
| 15% | $20.60 | 0.15 gal | $137.33 |
| 25% | $25.30 | 0.25 gal | $101.20 |
| 30% | $47.05 | 0.30 gal | $156.83 |
Prices are single-gallon Technical Grade list prices as of September 2026 and exclude freight and hazmat handling. Case and drum quantities lower the per-gallon figure further.
Two things fall out of that table.
First, 3% costs about five times as much per unit of active oxygen as 15%, and nearly seven times as much as 25%. If you use peroxide in any volume, buying it dilute is the single most expensive decision available to you.
Second, 10%, 12% and 15% Technical Grade are all priced at the same figure per gallon, so 15% delivers half again as much active oxygen as 10% for identical money.
Do you need ACS Reagent Grade or Technical Grade hydrogen peroxide?
Choose Technical Grade for cleaning, bleaching, odour work and general industrial use; choose ACS Reagent Grade when your method, instrument or auditor requires certified purity limits. Both contain the same active molecule at the same stated concentration — what differs is how tightly the trace impurities are specified and documented.
ACS Reagent Grade meets American Chemical Society specifications, with assayed limits on residue, metals and other trace contaminants. That certification matters in analytical chemistry, electronics and regulated processes where an unmeasured trace metal would either ruin the result or catalyse the peroxide. It is wasted money on a grout stain.
If you are not certain which your application needs, tell us what the peroxide is going into and we will specify the grade — so you are neither overpaying for purity you will never use, nor under-specifying a step where it matters.
How should you store hydrogen peroxide so it does not lose strength?
Store hydrogen peroxide cool, dark, upright and vented, in its original container. It decomposes into water and oxygen continuously, and heat, light, metal ions and contamination all accelerate that decay — which is why it ships in opaque, vented containers rather than clear sealed ones.
A sealed container of concentrated peroxide can build enough oxygen pressure to rupture, so vented closures are a safety feature, not packaging economy. Never decant unused peroxide back into the stock container: the trace contamination you return with it will shorten the life of the entire jug.
For a fuller treatment of shelf life and how to tell whether a jug is still good, see does hydrogen peroxide expire.
Frequently asked questions about hydrogen peroxide concentrations
What is the highest concentration of hydrogen peroxide you can buy?
Alliance Chemical stocks hydrogen peroxide up to 30%, in both Technical Grade and ACS Reagent Grade. Above roughly 8% it is a corrosive material that causes severe skin and eye burns, so 30% ships with hazmat handling and is intended to be diluted before use.
Is 12% hydrogen peroxide the same chemical as 3%?
Yes. Both are hydrogen peroxide, CAS 7722-84-1. The only difference is how much water the solution contains. 12% carries four times as much active hydrogen peroxide per millilitre as 3%, so it acts faster and can be diluted four to one to make 3%.
How do you dilute 30% hydrogen peroxide to 3%?
Use one part 30% to nine parts distilled water by volume. In formula terms, V1 = (C2 x V2) / C1, so 1 litre of 3% needs 100 mL of 30% topped up to 1000 mL. Always add the peroxide to the water, and use distilled or deionised water rather than tap water.
Why is 3% hydrogen peroxide so much more expensive per unit of peroxide?
Because 97% of what you are buying is water. Measured as cost per gallon of actual hydrogen peroxide, 3% runs about five times the cost of 15% and nearly seven times the cost of 25%, since the price covers packaging and freighting water you could have added yourself.
What is the difference between ACS Reagent Grade and Technical Grade hydrogen peroxide?
Both contain the same active molecule at the same stated concentration. ACS Reagent Grade meets American Chemical Society specifications with certified limits on trace metals and residue, which matters in analytical, electronics and regulated work. Technical Grade is the right choice for cleaning, bleaching and general industrial use.
Can you mix hydrogen peroxide and vinegar?
Not in the same container. Combining them forms peracetic acid, which is considerably more corrosive than either ingredient and produces vapour that irritates the eyes and airway. Using one after the other with a thorough rinse in between is a different matter; the hazard comes from mixing and storing them together.
What concentration of hydrogen peroxide is used for laundry and stain removal?
Most stain and laundry work is done between 6% and 12%. 12% is our top-selling concentration by revenue because it is strong enough to brighten laundry and lift set-in carpet stains, yet dilutes four to one down to 3% for lighter jobs.
Does hydrogen peroxide need to be stored in a dark container?
Yes. Light, heat, metal ions and contamination all accelerate the decomposition of hydrogen peroxide into water and oxygen. It should be kept cool, dark and upright in its original vented container, and unused product should never be poured back into the stock jug.
Buy hydrogen peroxide by the concentration you need
Every strength below is stocked in quart, gallon, case and bulk quantities, with a Certificate of Analysis available on request. Not sure which rung of the ladder your process needs? Tell us the application and we will specify the concentration and grade.
Related reading
- Does hydrogen peroxide expire? — shelf life, decomposition and how to test a jug.
- Mixing hydrogen peroxide and vinegar — what peracetic acid is and why the combination is handled with care.
- The complete hydrogen peroxide guide — chemistry, properties and industrial applications.
- Hydrogen peroxide for plants — root treatment and garden dilutions.
- Hydrogen peroxide pool treatment — chlorine-free pool chemistry.
- Hydrogen peroxide in semiconductor manufacturing — SC-1, SC-2 and wafer cleaning chemistry.
Frequently Asked Questions
What is the highest concentration of hydrogen peroxide you can buy?
Alliance Chemical stocks hydrogen peroxide up to 30%, in both Technical Grade and ACS Reagent Grade. Above roughly 8% it is a corrosive material that causes severe skin and eye burns, so 30% ships with hazmat handling and is intended to be diluted before use.
Is 12% hydrogen peroxide the same chemical as 3%?
Yes. Both are hydrogen peroxide, CAS 7722-84-1. The only difference is how much water the solution contains. 12% carries four times as much active hydrogen peroxide per millilitre as 3%, so it acts faster and can be diluted four to one to make 3%.
How do you dilute 30% hydrogen peroxide to 3%?
Use one part 30% to nine parts distilled water by volume. In formula terms, V1 = (C2 x V2) / C1, so 1 litre of 3% needs 100 mL of 30% topped up to 1000 mL. Always add the peroxide to the water, and use distilled or deionised water rather than tap water.
Why is 3% hydrogen peroxide so much more expensive per unit of peroxide?
Because 97% of what you are buying is water. Measured as cost per gallon of actual hydrogen peroxide, 3% runs about five times the cost of 15% and nearly seven times the cost of 25%, since the price covers packaging and freighting water you could have added yourself.
What is the difference between ACS Reagent Grade and Technical Grade hydrogen peroxide?
Both contain the same active molecule at the same stated concentration. ACS Reagent Grade meets American Chemical Society specifications with certified limits on trace metals and residue, which matters in analytical, electronics and regulated work. Technical Grade is the right choice for cleaning, bleaching and general industrial use.
Can you mix hydrogen peroxide and vinegar?
Not in the same container. Combining them forms peracetic acid, which is considerably more corrosive than either ingredient and produces vapour that irritates the eyes and airway. Using one after the other with a thorough rinse in between is a different matter; the hazard comes from mixing and storing them together.
What concentration of hydrogen peroxide is used for laundry and stain removal?
Most stain and laundry work is done between 6% and 12%. 12% is our top-selling concentration by revenue because it is strong enough to brighten laundry and lift set-in carpet stains, yet dilutes four to one down to 3% for lighter jobs.
Does hydrogen peroxide need to be stored in a dark container?
Yes. Light, heat, metal ions and contamination all accelerate the decomposition of hydrogen peroxide into water and oxygen. It should be kept cool, dark and upright in its original vented container, and unused product should never be poured back into the stock jug.
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