Product Overview
Sodium Hydroxide 25% ACS Grade is an aqueous caustic soda solution at reagent-level purity, stocked and shipped daily from our Taylor, TX warehouse. It is a colorless, odorless, strongly alkaline liquid — the workhorse base for titration, pH adjustment, and chemical synthesis. Buyers who order it from us are typically QC labs running analytical work, water-treatment operators dosing for pH control, and chemical processors who want a base that pours and meters accurately without dissolving solid lye on site.
Also sold under the name caustic soda, this product carries CAS number 1310-73-2. Because it ships as a ready-to-use 25% solution, there is no exothermic dissolution step at your facility — one of the highest-risk moments in caustic handling simply never happens.
Why This Concentration
25% is the practical middle ground for caustic soda. It is concentrated enough to do real work — neutralizing acid streams, saponifying oils, stripping organic soils — yet dilute enough to stay pourable and pumpable at normal warehouse temperatures, where 50% caustic can freeze solid in a cold dock. For metering pumps and titration burettes, that consistency matters more than raw strength.
The ACS Grade designation matters when your results have to hold up: analytical titrations, standard solution prep, and QC methods where reagent purity drives repeatability. If your process is pH adjustment, cleaning, or general neutralization where reagent-level purity adds cost without adding value, our standard Sodium Hydroxide 25% covers the same concentration at a working-grade price. Same chemistry, same handling rules — the difference is what your application demands of the certificate.
Chemical Profile
This is a colorless liquid solution, odorless in normal handling, and noticeably denser than water — our published density is 1.27 for the 25% w/w aqueous solution at 20 °C. That density is worth knowing before you spec transfer pumps or secondary containment: a 55-gallon drum of this product weighs meaningfully more than the same drum of water. Vapor pressure is approximately 0 mmHg, so the hazard is contact and splash, not inhalation of vapor from a closed container. The solute is sodium hydroxide, formula NaOH (written NaOH in most process documentation), molecular weight 39.997, CAS 1310-73-2, with a published solubility figure of 111%. The solution is corrosive to metals and tissue; contact severely irritates skin, eyes, and mucous membranes, and it is toxic by ingestion. Treat every transfer as a splash-risk operation.
Industrial Applications
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pH adjustment in water treatment. Operators dose caustic to neutralize acidic influent and hold discharge pH inside permit limits. A 25% solution meters cleanly through chemical feed pumps and responds predictably in control loops.
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Laboratory reagent and titration. ACS-grade caustic is the standard base for acid-base titration and standard solution preparation. Starting from a solution eliminates the weighing and dissolution errors that come with pelletized NaOH.
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Chemical synthesis. Sodium hydroxide is the base of choice in saponification and in the production of soaps, detergents, and downstream sodium salts. The 25% strength gives formulators a known-concentration feedstock that blends without a heat spike.
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Industrial cleaning formulation. Caustic dissolves fats, oils, and organic soils, which is why it anchors heavy-duty degreasers, tank-cleaning solutions, and CIP chemistries.
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Food processing support. Caustic soda is used in food-industry operations for pH control and as a processing aid; verify that your application's grade requirements align with this product before specifying it.
Handling & Storage
The signal word is Danger, with hazard statements H290 (may be corrosive to metals) and H314 (causes severe skin burns and eye damage), per the product's GHS classification. That drives every handling rule we follow in our own warehouse: chemical splash goggles, caustic-rated gloves, and body coverage for any open transfer. No exceptions for a quick sample pull — H314 injuries happen in seconds.
Store it cool and dry, away from acids and reactive organics, in HDPE or glass — never in unlined metal, because this solution attacks metals (H290). Keep containers closed and out of direct sunlight, and give storage areas ventilation. Because the product arrives pre-diluted, there is no dilution exotherm to manage in storage; your main stability concern is container integrity and segregation from incompatibles.
Hazmat & Shipping
This product ships as a fully regulated corrosive. It moves under UN1824 (per 49 CFR 172.101), Hazard Class 8 (per 49 CFR 172.101), Packing Group II (per 49 CFR 172.101), with the proper shipping name SODIUM HYDROXIDE SOLUTION (per 49 CFR 172.101). We pack it in UN-rated packaging with compliant marks and labels, and every shipment leaves our dock with correct hazmat documentation. Alliance Chemical charges hazmat fees may apply. Our shipping and handling guidance is reviewed by Andre Taki, DOT Hazmat Specialist.
Documentation
A Safety Data Sheet ships with every order and is available in English, Spanish, French, and Japanese. A lot-specific Certificate of Analysis is available for the material you receive — for ACS-grade analytical work, that lot traceability is usually the reason buyers choose this SKU. A technical data sheet is also available for process and engineering review.
Why Buy from Alliance Chemical
We are hazmat operators. we distribute this solution in Taylor, TX, pack it in UN-rated containers on our own dock, and ship Class 8 corrosives daily — from single quarts for the bench to 55-gallon drums, 275-gallon and 330-gallon totes for production dosing. Orders ships under applicable requirements because the product is on our floor, not drop-shipped. Your shipment arrives labeled, documented, and packed by people who handle caustic every working day, with hazmat fees may apply added at checkout.
