Phosphoric Acid 50% ACS Grade

Name: Phosphoric Acid 50% ACS Grade
Brand: Alliance Chemical
SKU: FS7-B92-P6C
Availability: InStock

Quick Answer

What is Phosphoric Acid 50% ACS Grade used for, and what should buyers verify before ordering?

Phosphoric Acid 50% ACS Grade is supplied at 50% in ACS Reagent Grade with UN UN1805, DOT Class 8 . Buyers should confirm pack size, grade, SDS, COA needs, and freight requirements before purchase.

Assay: 50%
Grade: ACS Reagent Grade
UN number: UN UN1805
DOT class: 8
Documents: SDS and lot-specific COA support
Shipping: UPS for small packs; LTL/FTL for pails, drums, totes, and bulk orders

Commercial Fulfillment Snapshot

Buy Phosphoric Acid 50% ACS Grade 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 EN SDS FR SDS ES SDS JA TDS COA

Lot-specific COA is issued per shipment batch.

Who Buys This

Industrial purchasing teams
Plant and maintenance operators
Laboratory and QA teams

Purity / Grade Guide

ACS Reagent Grade for commercial purchasing
50% concentration / assay target
Lot-specific COA available with shipment; TDS published

Pack Sizes

1 Quart
1 Gallon
5 Gallon
15 Gallon
55 Gallon
275 Gallon
330 Gallon

SDS / COA / TDS

SDS available for immediate download
TDS available for specification review
COA available by shipment batch
UN UN1805· Class 8 · PG III

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

Phosphoric Acid 50% ACS Grade is a pre-diluted aqueous solution of phosphoric acid (H3PO4) prepared with high-purity deionized water. This 50% concentration provides a convenient, ready-to-use form that eliminates the need for on-site dilution of concentrated stock. Appearance: Clear, viscous liquid. Meeting ACS Reagent Grade specifications, this product is suitable for analytical and laboratory applications requiring controlled purity and documented impurity limits.

Supplied by Alliance Chemical in sizes ranging from 1 quart to 330-gallon IBC totes, this solution is ideal for operations requiring consistent 50% strength with minimal handling risk compared to higher concentrations.

Key Properties

Chemical Name: Phosphoric Acid
Synonyms: Orthophosphoric Acid, H3PO4
Chemical Formula: H3PO4
CAS Number: 7664-38-2
Molecular Weight: 98 g/mol
Concentration: 50% (w/w)
Grade: ACS
Specific Gravity (20°C): 1.329
Boiling Point: 158°C (85%)
Flash Point: N/A
Appearance: Clear, viscous liquid
Solubility: Fully miscible with water

Common Applications

Metal Treatment & Rust Removal: Converts iron oxide to iron phosphate, providing corrosion-resistant surface preparation for coatings.
Food & Beverage Processing: Acidulant and pH regulator used in carbonated beverages, dairy processing, and sugar refining.
Water Treatment: Controls scale formation and adjusts pH in cooling towers, boilers, and municipal water systems.
Fertilizer Production: Primary feedstock for manufacturing phosphate fertilizers and animal feed supplements.
Laboratory & Analytical: Used as a reagent in chromatography, titration, and buffer preparation.

Safety Precautions

Phosphoric Acid solutions are corrosive and can cause severe burns. Handle with appropriate PPE, including chemical-resistant gloves, splash goggles, and protective clothing. Use in well-ventilated areas to minimize vapor inhalation. Store in a cool, dry place in HDPE or glass containers away from bases and metals.

PPE Requirements: Wear acid-resistant gloves, safety goggles, and face shield when handling concentrated solutions. In case of skin contact, wash immediately with plenty of water. In case of eye contact, rinse continuously for at least 15 minutes. Refer to the Safety Data Sheet (SDS) for full emergency response procedures.

Shipping: UN 1805, Phosphoric acid solution, Class 8, PG III.

Benefits

Pre-Diluted Convenience: Ready-to-use concentration eliminates on-site dilution errors and reduces handling risk.
Consistent Purity: Manufactured to strict quality standards for reliable performance in critical applications.
Versatile Sizing: Available from quart bottles to IBC totes to support any scale of operation.

Related Products

Property	Value
Molecular Weight	97.995
Formula	H3O4P
Assay	50%
Grade	ACS Reagent Grade
Form	Liquid
Solubility	Fully miscible with water
Appearance	Clear, viscous liquid
Melting Point	21°C (pure)
Boiling Point	158°C (85%)
Specific Gravity	1.329

Frequently Asked Questions About Phosphoric Acid 50% ACS Grade

What is Phosphoric Acid 50% ACS Grade and what is its chemical formula?

Phosphoric Acid 50% ACS Grade is a chemical compound with the molecular formula H3O4P, registered under CAS Number 7664-38-2 by the Chemical Abstracts Service (PubChem), with a molecular weight of 97.995 g/mol. Alliance Chemical supplies Phosphoric Acid 50% ACS Grade in ACS Reagent grade for laboratory, industrial, and commercial applications.

What are the physical properties of Phosphoric Acid 50% ACS Grade?

According to the NIOSH Pocket Guide to Chemical Hazards, Phosphoric Acid 50% ACS Grade has a clear, viscous liquid appearance. It has a melting point of 21°C (pure)°C, a boiling point of 158°C (85%)°C, a flash point of N/A. The specific gravity is 1.329 relative to water. Solubility: Fully miscible with water.

What grade and purity of Phosphoric Acid 50% ACS Grade does Alliance Chemical offer?

Alliance Chemical offers Phosphoric Acid 50% ACS Grade in ACS Reagent grade with a purity assay of 50%. 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 Phosphoric Acid 50% ACS Grade?

Phosphoric Acid 50% ACS Grade has applications in laboratory research, manufacturing, and industrial processing.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.

What PPE is required when handling Phosphoric Acid 50% ACS Grade?

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 Phosphoric Acid 50% ACS Grade?

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:bases, reactive metals, organic materials. Maximum storage:2-3 years unopened.

What is the emergency spill procedure for Phosphoric Acid 50% ACS Grade?

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)Carefully neutralize with sodium bicarbonate (5-10% solution), monitor exothermic reaction. (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 Phosphoric Acid 50% ACS Grade?

DOT Classification per 49 CFR 172.101:UNUN1805, Hazard Class8, Packing GroupIII. 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 Phosphoric Acid 50% ACS Grade 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 Phosphoric Acid 50% ACS Grade?

Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Phosphoric Acid 50% ACS Grade. 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.

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