{"product_id":"sodium-hydroxide-25-acs-grade","title":"Sodium Hydroxide 25% ACS Grade","description":"\u003ch2\u003eProduct Overview\u003c\/h2\u003e\n\u003cp\u003eSodium Hydroxide 25% ACS Grade is a highly purified aqueous solution of sodium hydroxide — a vital reagent in analytical chemistry, industrial synthesis, and chemical research. Known colloquially as caustic soda, this strongly alkaline liquid solution is prepared with strict adherence to rigorous quality standards — ensuring minimal trace impurities. By maintaining a stable 25% concentration, Alliance Chemical provides a reliable, pre-diluted form of this strong base, eliminating the hazards and thermal energy spikes associated with dissolving solid sodium hydroxide pellets in water.\u003c\/p\u003e\n\u003cp\u003eFor industrial facilities, municipal operations, and research laboratories, having access to a pre-formulated 25% concentration is highly advantageous. This precise formulation ensures consistent batch chemistry, predictable reaction rates, and simplified handling during fluid dosing. The solution appears as a colorless and odorless liquid, though it remains significantly denser than water, requiring appropriate agitation and storage setups. Safety remains a primary concern during handling, as this corrosive agent can severely irritate or damage biological tissue upon contact. You can browse our full range of \u003ca href=\"\/collections\/bases\"\u003ebases\u003c\/a\u003e or view other \u003ca href=\"\/products\/sodium-hydroxide-50-membrane-grade\"\u003esodium hydroxide solutions\u003c\/a\u003e to find the exact chemical concentration for your facility.\u003c\/p\u003e\n\n\u003ch3\u003eWhy This Grade\u003c\/h3\u003e\n\u003cp\u003eACS Grade chemical solutions are manufactured to meet the rigorous specifications established by the American Chemical Society, capping metallic impurities, chlorides, and silicates at exceptionally low parts-per-million levels. In high-precision processes, choosing the correct analytical grade is critical because any excess trace contaminants can poison expensive catalysts or distort spectroscopic baselines. A 25% concentration provides a balance between alkalinity and viscosity, facilitating easier pumping and dosing through automated systems compared to highly viscous 50% solutions.\u003c\/p\u003e\n\u003cp\u003eSelecting an incorrect grade or concentration can introduce severe operational failure modes in critical chemical pathways. For instance, using a technical or industrial grade in analytical testing can yield false positives during trace element detection, potentially invalidating research protocols. Furthermore, attempting to use an incorrect concentration can lead to uncontrolled pH spikes or exothermic boiling, risking equipment failure. Alliance Chemical ensures that our ACS Grade material maintains the stringent purity required to prevent these chemical interferences and system-wide failures.\u003c\/p\u003e\n\n\u003cdiv class=\"chemical-profile\" data-source=\"canonical\"\u003e\n\u003ch3\u003eChemical Profile\u003c\/h3\u003e\n\u003cdl\u003e\n\u003cdt\u003eCAS Number\u003c\/dt\u003e\n\u003cdd\u003e1310-73-2\u003c\/dd\u003e\n\u003cdt\u003eChemical Formula\u003c\/dt\u003e\n\u003cdd\u003eHNaO\u003c\/dd\u003e\n\u003cdt\u003eMolecular Weight\u003c\/dt\u003e\n\u003cdd\u003e39.997 g\/mol\u003c\/dd\u003e\n\u003cdt\u003eBoiling Point\u003c\/dt\u003e\n\u003cdd\u003egreater than 266 °F at 760 mmHg (USCG, 1999)\u003c\/dd\u003e\n\u003cdt\u003eMelting Point\u003c\/dt\u003e\n\u003cdd\u003e604 °F (USCG, 1999)\u003c\/dd\u003e\n\u003cdt\u003eSpecific Gravity\u003c\/dt\u003e\n\u003cdd\u003e1.5 at 68 °F (USCG, 1999) - Denser than water; will sink\u003c\/dd\u003e\n\u003cdt\u003eAppearance\u003c\/dt\u003e\n\u003cdd\u003eSodium hydroxide solution appears as a colorless liquid. More dense than water. Contact may severely irritate skin, eyes, and mucous membranes. Toxic by ingestion. Corrosive to metals and tissue.\u003c\/dd\u003e\n\u003cdt\u003eSolubility\u003c\/dt\u003e\n\u003cdd\u003e111 % (NIOSH, 2024)\u003c\/dd\u003e\n\u003cdt\u003eUN Number\u003c\/dt\u003e\n\u003cdd\u003eUN1824\u003c\/dd\u003e\n\u003cdt\u003eHazard Class\u003c\/dt\u003e\n\u003cdd\u003eClass 8\u003c\/dd\u003e\n\u003cdt\u003ePacking Group\u003c\/dt\u003e\n\u003cdd\u003eII\u003c\/dd\u003e\n\u003cdt\u003eProper Shipping Name\u003c\/dt\u003e\n\u003cdd\u003eSODIUM HYDROXIDE SOLUTION\u003c\/dd\u003e\n\u003cdt\u003eGHS Signal Word\u003c\/dt\u003e\n\u003cdd\u003eDanger\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003cp class=\"chemical-profile__note\"\u003e\u003cem\u003eValues sourced from Alliance Chemical's canonical chemistry registry. Certificate of Analysis (COA) per lot.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eIndustrial Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eChemical Synthesis and pH Regulation: It acts as an essential reactant in neutralizing acidic waste streams and adjusting pH levels in complex organic synthesis pipelines.\u003c\/li\u003e\n  \u003cli\u003eWater Treatment and Municipal Purification: This solution is extensively utilized for controlling alkalinity and heavy metal precipitation in industrial wastewater treatment facilities.\u003c\/li\u003e\n  \u003cli\u003eSoap and Detergent Manufacturing: Serving as a primary alkaline source for saponifying fats and oils, it helps produce high-quality cleaning agents and surfactants.\u003c\/li\u003e\n  \u003cli\u003eTextile Processing and Mercerization: The solution is employed in treating cotton and wood pulp, increasing fiber strength, luster, and dye absorption capacities.\u003c\/li\u003e\n  \u003cli\u003eMetal Finishing and Etching: Industrial operations use it to degrease, clean, and etch metal surfaces prior to electroplating, anodizing, or protective coating application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHazmat \u0026amp; Shipping\u003c\/h3\u003e\n\u003cp\u003eDue to its corrosive properties, Sodium Hydroxide 25% ACS Grade is classified as a regulated hazardous material for transportation. Under Department of Transportation guidelines, it is shipped as \u003cstrong\u003eUN1824\u003c\/strong\u003e, Hazard Class \u003cstrong\u003e8\u003c\/strong\u003e, Packing Group \u003cstrong\u003eII\u003c\/strong\u003e, with the proper shipping name \u003cstrong\u003eSODIUM HYDROXIDE SOLUTION\u003c\/strong\u003e. The canonical GHS signal word is \u003cstrong\u003eDanger\u003c\/strong\u003e. Container labels carry GHS pictograms: not applicable. Standard shipping protocols require specialized, heavy-duty packaging to prevent leaks, ensuring safe transport across our national distribution network. Every shipment is accompanied by a comprehensive Safety Data Sheet (SDS) that details spill containment and emergency response procedures.\u003c\/p\u003e\n\u003cp\u003eAppropriate personal protective equipment (PPE) is mandatory when handling this material, specifically dictated by GHS codes H290 (corrosive to metals) and H314 (causes severe skin burns and eye damage). Workers must wear chemical-resistant gloves, splash-resistant goggles, a face shield, and protective garments to avoid any direct skin or eye contact. If an accidental spill occurs, neutralize with a weak acid solution or absorb with non-combustible materials as specified in the SDS. Always maintain a readily accessible eyewash station and safety shower in areas where this corrosive base is processed.\u003c\/p\u003e\n\n\u003ch3\u003eHandling \u0026amp; Storage\u003c\/h3\u003e\n\u003cp\u003eSafe handling of this alkaline liquid requires storage in a cool, dry, well-ventilated area, preferably within a temperature range of 60°F to 85°F to prevent freezing or crystallization. Sodium hydroxide is highly corrosive to metals such as aluminum, zinc, and tin, which can release flammable hydrogen gas upon contact; therefore, compatibility with storage tanks made of polyethylene, polypropylene, or lined steel is vital. Keep containers tightly closed to prevent the absorption of atmospheric carbon dioxide, which degrades the solution into sodium carbonate, and store far away from strong acids and oxidizing agents.\u003c\/p\u003e\n\n\u003ch3\u003eOrder \u0026amp; Documentation\u003c\/h3\u003e\n\u003cp\u003eAt Alliance Chemical, we ensure complete transparency and documentation for all our products. A Certificate of Analysis (COA) is available upon request to verify the purity, and a comprehensive Safety Data Sheet (SDS) is provided with every order to support your facility compliance goals. To secure your supply or clarify handling requirements, you can \u003ca href=\"\/pages\/contact\" class=\"cta-button\"\u003eRequest a Quote\u003c\/a\u003e or \u003ca href=\"\/pages\/safety-data-sheets\"\u003eDownload the SDS\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy from Alliance Chemical\u003c\/h3\u003e\n\u003cp\u003eSince 1997, Alliance Chemical has supplied premium industrial chemicals from Taylor, Texas under CAGE Code 1LT50, with a COA and SDS included on every order. For industrial use only.\u003c\/p\u003e","brand":"Alliance Chemical","offers":[{"title":"1 Quart \/ 1 Quart","offer_id":41291558158378,"sku":"YLJ-3SW-2JE","price":21.2,"currency_code":"USD","in_stock":true},{"title":"1 Quart \/ 2 Quarts","offer_id":41291574345770,"sku":"S2U-N8W-NUR","price":26.36,"currency_code":"USD","in_stock":true},{"title":"1 Quart \/ 4 Quarts","offer_id":41374815649834,"sku":"35U-SS3-E5T","price":33.79,"currency_code":"USD","in_stock":true},{"title":"1 Quart \/ 8 Quarts","offer_id":41374815682602,"sku":"PS2-PQ8-UN4","price":44.58,"currency_code":"USD","in_stock":true},{"title":"1 Gallon \/ 1 Gallon","offer_id":41291574378538,"sku":"UWH-BGC-CVN","price":33.79,"currency_code":"USD","in_stock":true},{"title":"1 Gallon \/ 2 Gallons","offer_id":41374815715370,"sku":"CS1-DZR-KHD","price":44.58,"currency_code":"USD","in_stock":true},{"title":"1 Gallon \/ 4 Gallon Case","offer_id":41291574411306,"sku":"B20-G09-3N5","price":84.98,"currency_code":"USD","in_stock":true},{"title":"1 Gallon \/ 4 Gallons x 36 Cases","offer_id":41891045769258,"sku":"KHF-S1A-3ZB","price":2355.77,"currency_code":"USD","in_stock":true},{"title":"5 Gallon \/ 5 Gallon Pail","offer_id":41291574476842,"sku":"6ZC-YGB-KQM","price":109.24,"currency_code":"USD","in_stock":true},{"title":"5 Gallon \/ 4 x 5 Gallon Pails","offer_id":41374815748138,"sku":"BK2-ZQU-HRE","price":402.01,"currency_code":"USD","in_stock":true},{"title":"5 Gallon \/ 36 x 5 Gallons (Pallet)","offer_id":41884775481386,"sku":"5K9-CMM-RSH","price":2817.56,"currency_code":"USD","in_stock":true},{"title":"15 Gallon \/ 15 Gallon Drum","offer_id":41291574542378,"sku":"PM4-NJV-CNZ","price":306.12,"currency_code":"USD","in_stock":true},{"title":"55 Gallon \/ 55 Gallon Drum","offer_id":41291574575146,"sku":"6VJ-LG2-MY5","price":908.86,"currency_code":"USD","in_stock":true},{"title":"55 Gallon \/ 4 x 55 Gallon Drums","offer_id":41291574607914,"sku":"H3B-0SR-CZC","price":2817.56,"currency_code":"USD","in_stock":true},{"title":"275 Gallon \/ 275 Gallon IBC Tote","offer_id":41884775514154,"sku":"1YB-Y88-V5H","price":3200.15,"currency_code":"USD","in_stock":true},{"title":"330 Gallon \/ 330 Gallon IBC Tote","offer_id":43829839790122,"sku":"8BC-QZN-6OJ","price":3532.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0588\/2734\/1866\/files\/sodium-hydroxide-25-acs-quart_252c8396-7c16-4b4b-ac79-0418afebddc2.jpg?v=1748983655","url":"https:\/\/alliance-chemical-store.myshopify.com\/products\/sodium-hydroxide-25-acs-grade","provider":"Alliance Chemical","version":"1.0","type":"link"}