Phosphoric Acid 75 ACS Grade

Description

Product Overview

Alliance Chemical provides Phosphoric Acid 75 ACS Grade to meet the strict demands of laboratory and industrial processes requiring high-purity chemical reagents. Characterized by its molecular formula H3O4P and a molecular weight of 97.995, this clear, colorless liquid represents a highly stable, odorless source of inorganic acid. It has a high density of 1.575 at 77 °F, which means it is denser than water and will sink when mixed. With a low pH of 1.5 in a 0.1 N aqueous solution, this chemical is key for precise adjustments in chemical synthesis. Our Texas-based team distributes this acid to facilities across North America, ensuring that critical operations receive consistent purity lots for their testing and formulation needs.

Known systematically as phosphoric acid, this compound is miscible in water and exhibits a low vapor pressure of 0.03 mmHg, minimizing volatile fumes during handling. Because it is non-flammable and has an autoignition temperature classified as not flammable, it provides a stable profile in hot industrial environments. However, its corrosive nature requires strict adherence to safety protocols. Facilities utilize this chemical for specialized industrial tasks including catalyst formulation, metal treatment, and pH stabilization where organic contaminants cannot be tolerated. We offer this material in multiple packaging configurations, ranging from individual quarts to multi-gallon cases, ensuring that both bench-top research projects and larger-scale production systems have access to reliable supply volumes.

Why This Grade

Selecting ACS Grade phosphoric acid is critical when your analytical workflows or synthesis processes demand extremely low tolerances for trace impurities. ACS Grade reagents are formulated to meet the strict specifications of the American Chemical Society, meaning that heavy metals, chlorides, sulfates, and other potential interferents are kept below stringent threshold limits. When using standard technical or commercial grades, unpredictable baseline shifts can occur in chromatography, or catalyst poisoning can happen in synthesis reactions. The 75 ACS Grade provides a reliable standard of concentration and purity, ensuring that experimental results remain reproducible across different batches and time periods.

Utilizing the wrong concentration or a lower-grade alternative can introduce critical failure modes to your systems. For instance, trace metal contaminants in lower-grade acids can catalyze unwanted side reactions, distort analytical spectroscopy baselines, or cause premature degradation of delicate substrate surfaces during etching processes. Furthermore, using an incorrect dilution or technical grade can lead to precipitation of impurities within sensitive dosing pumps and process piping, causing mechanical blockages and costly system downtime. By implementing Alliance Chemical’s ACS Grade phosphoric acid, operators mitigate these contamination risks, protecting expensive analytical hardware and ensuring the integrity of high-sensitivity manufacturing outputs.

Chemical Profile

CAS Number

7664-38-2

Chemical Formula

H3O4P

Molecular Weight

97.995 g/mol

Boiling Point

greater than 266 °F at 760 mmHg (USCG, 1999)

Melting Point

108 °F (NIOSH, 2024)

Flash Point

Non-flammable °C

Specific Gravity

1.575 at 77 °F (USCG, 1999) – Denser than water; will sink

Appearance

Phosphoric acid appears as a clear colorless liquid or transparent crystalline solid. The pure solid melts at 42.35 °C and has a density of 1.575 g / cm3. Liquid is usually a 75% aqueous solution. Shipped as both a solid and liquid. Corrosive to metals and tissue. Used in making fertilizers and detergents and in food processing.

Solubility

Miscible (NIOSH, 2024)

UN Number

UN1805

Hazard Class

Class 8

Packing Group

III

Proper Shipping Name

Phosphoric acid solution

GHS Signal Word

Danger

Values sourced from Alliance Chemical’s canonical chemistry registry. Certificate of Analysis (COA) per lot.

Industrial Applications

• Chemical Synthesis Catalyst: Serving as a highly pure catalytic agent in the synthesis of organic compounds and specialized ester formulations.
• Metal Surface Etching: Acting as a controlled chemical etchant to prepare and clean industrial metal surfaces prior to protective coating applications.
• pH Stabilization in Laboratories: Providing precise pH adjustment and buffer formulation in analytical testing, research experiments, and academic laboratory environments.
• Textile Processing Auxiliary: Used in industrial textile treatment to control acid dyes and set pigments without introducing mineral impurities.
• Detergent Formulation Component: Serving as an ingredient in specialized industrial detergents and surface cleaners designed for high-purity cleaning operations.

Hazmat & Shipping

Phosphoric Acid 75 ACS Grade is classified as a regulated hazardous material. For transport, it is designated under UN1805, Hazard Class 8, Packing Group III, with the proper shipping name “Phosphoric acid solution”. The designated signal word is Danger. It is highly corrosive to metals and human tissue. Alliance Chemical coordinates all freight and parcel shipments in strict compliance with DOT hazmat shipping regulations. Our team packages this acid in robust, compatible containers to ensure safe transit from our Texas warehouse directly to your facility, preventing leaks and minimizing transport hazards.

Due to its GHS classification and hazard statement H314, which indicates that the substance causes severe skin burns and eye damage, personnel must wear appropriate personal protective equipment (PPE). When handling this chemical, operators are required to use chemical-resistant gloves, protective clothing, and splash-resistant eye protection or full-face shields. In accordance with safety standards, a Safety Data Sheet (SDS) is provided with every order to detail necessary exposure controls and spill response protocols. Proper ventilation must be maintained in the work area, and emergency eyewash stations should be readily accessible.

Handling & Storage

Phosphoric Acid 75 ACS Grade should be stored in a cool, dry, well-ventilated area, ideally at temperatures between 60 °F and 85 °F to prevent crystallization, as the pure solid melting point is 108 °F. This substance is highly corrosive to metals, meaning it must be stored in original high-density polyethylene (HDPE) or other fluoropolymer containers. Avoid contact with incompatible materials, including strong bases, strong oxidizing agents, and active metals like aluminum, zinc, and tin, which can react to liberate flammable hydrogen gas. Ensure containers remain tightly sealed when not in use.

Order & Documentation

Alliance Chemical is committed to providing consistent quality and complete technical documentation for all our chemical shipments. A Certificate of Analysis (COA) is available upon request for every batch to verify purity specifications, and a Safety Data Sheet (SDS) is provided with every order. If you need assistance choosing the right container size for your workflow, explore our full range of industrial acids. Contact our team today to Request a Quote or Download the SDS.

Why Buy from Alliance Chemical

Since 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.