Phosphoric Acid 75% USP Food Grade

Product Overview

Phosphoric Acid 75% USP Food Grade is a colorless, odorless liquid that provides precise acidity management for food processing and formulation work. This orthophosphoric acid solution is formulated at 75% w/w, balancing strong acidity with manageable viscosity for use as a pH adjuster, acidulant, and nutritional phosphorus source in consumer beverages and processed foods. It meets USP-NF monograph expectations for food-grade applications, with rigorous control of impurities to support safe formulation across dietary products and cleaning regimes in facilities handling sensitive ingredients.

In addition to its role as an acidity regulator, the product serves as a reliable buffering agent and support for formulation stability in pharmaceutical and agricultural contexts. Its compatibility with water and broad acceptance in food and beverage processing make it suitable for a range of validated processes, including cleaning, sanitization, and mineral supplementation in large-scale production environments.

Key Properties

• Property Name: CAS Number
• Chemical Formula: H₃PO₄
• Molecular Weight: 97.99 g/mol
• Boiling Point: 158 °C
• Specific Gravity: 1.57–1.59 (at 25°C)
• Density (25C): 1.685 g/mL
• Appearance: Clear, colorless liquid
• Odor: Odorless
• Solubility in Water: Miscible
• Acidity / pKa: pKa 2.2 (first dissociation)
• Refractive Index (20C): 1.334
• Vapor Pressure (20C): 0.1 mmHg

Common Applications

• pH Adjuster: Used to adjust the acidity levels in various food products, enhancing flavor and preservation with precise titration control for consistent formulation.
• Food Additive: Acidulant in soft drinks and beverages to provide tangy flavor profiles and stable acid balance in multi-component formulations.
• Nutrient Source: Source of phosphorus in fertilizers to promote plant growth in agricultural applications and hydroponic systems.
• Cleaning Agent: Active component in industrial cleaning formulations to remove rust and mineral deposits in processing equipment.
• Buffering Agent: Used in pharmaceutical formulations to maintain stable pH during manufacturing and storage.

Safety Precautions

Handle and store under controlled conditions: store in a cool, dry place away from incompatible materials, using HDPE or glass containers to minimize reaction risk. Wear appropriate PPE, including gloves and goggles, and ensure adequate ventilation to prevent vapor buildup. Follow established SOPs and the SDS guidelines to manage exposure risks and equipment compatibility.

Emergency and exposure guidelines: in case of contact, rinse skin or eyes with copious water for extended periods and seek medical attention if irritation or burns occur. For inhalation or ingestion, move to fresh air and seek medical care promptly. This product is categorized under UN 1805, Phosphoric acid, Class 8, PG II, with standard emergency procedures outlined in the SDS.

Benefits

✔ USP Food Grade Compliance – Meets USP-NF monograph requirements with controlled impurity levels for food and beverage applications.
✔ Reliable Acidity Control – Provides consistent acidity for pH adjustment, buffering, and formulation stability across processing operations.
✔ High Purity with Low Impurity Profile – Stringent heavy metal and contaminant limits support safe use in sensitive foods and cleaning regimens.
✔ Broad Solubility and Compatibility – Fully miscible with water and compatible with common processing aids, ensuring flexibility in formulation design.