Sodium Hydroxide 25% Solution (Caustic Soda)

Name: Sodium Hydroxide 25%
Brand: Alliance Chemical
SKU: AK1-R4R-98H
Availability: InStock

Commercial Fulfillment Snapshot

Buy Sodium Hydroxide 25% with faster decisions and fewer back-and-forth emails.

Ships from Taylor, Texas. In-stock orders placed before 1:00 PM CT (Mon-Thu) and before 12:00 PM CT (Fri) typically ship same business day. Order online 24/7.

Email Bulk Quote Call (512) 365-6838

Technical Documents

SDS TDS COA

Lot-specific COA is issued per shipment batch.

Who Buys This

Water treatment facilities
Chemical manufacturers
Soap & detergent producers
Industrial cleaning companies
Research laboratories

Purity / Grade Guide

Industrial & lab applications
Purity verified by COA
Suitable for commercial use
25% aqueous solution ready-to-use

Pack Sizes

1 Quart: lab & small jobs
1 Gallon: shop & maintenance
5 Gallon: production & regular use
15 Gallon: mid-volume operations
55 Gallon: bulk drum
275 Gallon: high-volume tote
330 Gallon: max-volume tote

SDS / COA / TDS

SDS with every order
COA showing 24.5-25.5% assay
UN 1824 Class 8 packaging
Proper hazmat shipping labels

Small Packs: UPS Ground nationwide for pints, quarts, and gallons.

LTL / FTL: ABF, SEFL, Saia, XPO, and partner carriers for pails, drums, totes, and full truckloads.

Support: Email or call for freight options, hazardous-material routing, and lead-time confirmation.

Description
Product Documents
Chemical Profile

Product Overview

Sodium Hydroxide 25% is a highly alkaline aqueous solution of NaOH, formulated to deliver consistent reactivity for industrial applications. Commonly known as Caustic Soda or Lye, this solution is designed for precise pH control, offering strong basicity suitable for large-volume usage in water treatment, metal finishing, and chemical processing. Its liquid form allows for easy metering and integration into existing feed systems.

This Technical Grade product is manufactured to strict specifications to ensure reliability in neutralization and saponification processes. It effectively hydrolyzes fats and oils, making it a premier choice for industrial degreasing and soap manufacturing. Sodium Hydroxide 25% provides a cost-effective, high-performance source of alkalinity for plant operations requiring stable chemical properties.

Key Properties

Appearance: Clear, colorless to slightly yellow liquid
Chemical Formula: NaOH
CAS Number: 1310-73-2
Molecular Weight: 40.00 g/mol
Specific Gravity (25°C): 1.18–1.30 (Typical 1.24)
Assay (wt %): 24.5–25.5%
Sodium Hydroxide Availability: ~25%
Solubility: Completely miscible in water
Boiling Point: Approx. 100°C

Common Applications

Water Treatment: Used extensively for pH adjustment and neutralization of acidic wastewater streams to meet discharge compliance.
Industrial Cleaning: Acts as a heavy-duty alkaline cleaner and degreaser for process equipment, effectively saponifying fats, oils, and grease.
Chemical Manufacturing: A vital reactant in the production of organic chemicals, soaps, detergents, and sodium salts.
Metal Processing: Used in metal surface preparation, etching, and refining processes.
Biodiesel Production: Functions as a catalyst in the transesterification process.

Safety Precautions

Sodium Hydroxide 25% is a corrosive liquid that causes severe skin burns and eye damage. Handling requires strict adherence to safety protocols and the use of appropriate Personal Protective Equipment (PPE), including chemical-resistant gloves, splash goggles, face shields, and protective suits. Ensure adequate ventilation to avoid inhaling mists or vapors.

Store in a cool, dry place in corrosion-resistant containers (such as HDPE) away from acids, moisture, and reactive metals (aluminum, zinc, tin). In the event of exposure, flush immediately with copious amounts of water and seek medical attention. Refer to the Safety Data Sheet (SDS) for detailed handling and emergency instructions.

Benefits

Reliable Alkalinity – Provides consistent pH adjustment power for industrial process control.
Versatile Utility – Suitable for wastewater treatment, cleaning, and chemical synthesis.
Liquid Formulation – Ready-to-use solution eliminates the need for dissolving solid pellets, reducing handling risks.
Broad Packaging Options – Available in sizes ranging from 1 Quart to 330 Gallon Totes to suit any operation scale.

Related Products

Property	Value
Molecular Weight	40 g/mol g/mol
Formula	NaOH
Assay	25%
Grade	Technical
Flash Point	N/A
Form	Liquid
Solubility	High water solubility, miscible with polar solvents
Appearance	Clear, pale liquid
Melting Point	318°C °C
Boiling Point	1390°C °C
Specific Gravity	1.275
Industry	Industrial, Chemical, Wastewater

Frequently Asked Questions About Sodium Hydroxide 25%

What is Sodium Hydroxide 25% and what is its chemical formula?

Sodium Hydroxide 25% is a chemical compound with the molecular formula NaOH, registered under CAS Number 1310-73-2 by the Chemical Abstracts Service (PubChem), with a molecular weight of 40 g/mol g/mol. Alliance Chemical supplies Sodium Hydroxide 25% in Technical grade for laboratory, industrial, and commercial applications.

What are the physical properties of Sodium Hydroxide 25%?

According to the NIOSH Pocket Guide to Chemical Hazards, Sodium Hydroxide 25% is supplied as a clear, pale liquid. It has a melting point of 318°C°C, a boiling point of 1390°C°C, a flash point of N/A. The specific gravity is 1.275 relative to water. Solubility: High water solubility, miscible with polar solvents.

What grade and purity of Sodium Hydroxide 25% does Alliance Chemical offer?

Alliance Chemical offers Sodium Hydroxide 25% in Technical grade with a purity assay of 25%. Every lot ships with a Certificate of Analysis (COA) and Safety Data Sheet (SDS) prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and GHS Revision 7. Download SDS.

What are common industrial applications of Sodium Hydroxide 25%?

Sodium Hydroxide 25% serves a wide range of sectors, including Industrial, Chemical, and Wastewater.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.

What PPE is required when handling Sodium Hydroxide 25%?

OSHA-mandated PPE per 29 CFR 1910.132-138:Chemical-resistant gloves (20+ mil neoprene or PVC), full face shield over safety goggles (ANSI Z87.1), acid-resistant apron or chemical suit, closed-toe chemical-resistant footwear. Respiratory protection (organic vapor cartridge) required in areas exceeding PEL/TLV per 29 CFR 1910.134. Emergency eyewash station and safety shower must be accessible within 10 seconds per ANSI Z358.1. Consult the SDS available from Alliance Chemical for complete PPE requirements.

What are the storage requirements for Sodium Hydroxide 25%?

Store perOSHA 29 CFR 1910.106: Approved flammable storage cabinet, maximum 60 gallons per cabinet, grounding/bonding required. Temperature range:15-25°C. Segregate from:acids, aluminum, zinc. Maximum storage:2-3 years unopened.

What is the emergency spill procedure for Sodium Hydroxide 25%?

Emergency response per EPA SPCC (40 CFR 112) and OSHA 29 CFR 1910.120: (1) Alert personnel, evacuate area to 100 feet. (2) Eliminate ignition sources if flammable. (3) Don PPE per SDS Section 8. (4) Stop leak if safe; use emergency shutoffs. (5) Contain with non-combustible absorbent materials, dike with sand/earth. (6)Neutralize with citric acid or acetic acid (5% solution). (7) Collect in DOT-approved containers, label as hazardous waste. Check 40 CFR 302.4 for Reportable Quantity. Emergency: Chemtel 1-800-255-3924 (24/7). Non-emergency: Alliance Chemical 512-365-6838.

What is the DOT shipping classification for Sodium Hydroxide 25%?

DOT Classification per 49 CFR 172.101:See SDS Section 14 for specific UN number, Hazard Class8 (Corrosive), Packing GroupII/III. Requires: Hazmat shipping papers (49 CFR 172.200), UN specification packaging (49 CFR 173), hazmat labels (172.400). Alliance Chemical ships all orders in DOT-compliant packaging with proper documentation.

How must Sodium Hydroxide 25% waste be disposed?

Disposal per RCRA (40 CFR 261-265):Characteristic waste D002 (Corrosive, pH ≤2 or ≥12.5). Generator requirements: EPA ID number required if >100 kg/month (40 CFR 262.12). Use EPA-permitted Treatment, Storage, Disposal Facility (TSDF). Never discharge to sewer without POTW written approval (40 CFR 403). Container disposal: Triple rinse (40 CFR 261.7), offer for reconditioning/recycling. State regulations may be more stringent — check with your local environmental agency. Consult the Alliance Chemical SDS for product-specific disposal guidance.

Does Alliance Chemical provide an SDS and COA for Sodium Hydroxide 25%?

Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Sodium Hydroxide 25%. The SDS is prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and the Globally Harmonized System (GHS) Revision 7, covering all 16 required sections including hazard identification, first aid measures, firefighting measures, handling and storage, exposure controls, and regulatory information. The SDS is available for download directly from this product page. COAs are available upon request by contacting Alliance Chemical at 512-365-6838.