Phosphoric Acid 75 ACS Grade

Product Overview

Phosphoric Acid 75% ACS Grade is a clear, colorless liquid solution of Orthophosphoric Acid (H3PO4) manufactured to exacting standards of purity. As a triprotic acid, it offers precise acidity control and functions as a reliable reagent for buffer systems, chemical synthesis, and analytical workflows. This product strictly conforms to ACS Reagent Grade specifications and USP-NF Monograph standards, ensuring minimal impurities.

With a typical assay of 75.0–76.5 wt%, this solution provides consistent performance for applications requiring rigorous quality control. It features exceptional clarity (APHA ≤ 10) and very low residue after ignition. The product is fully miscible with water and is compatible with HDPE and glass storage. It serves as a vital component in laboratory analysis, metal surface treatment, and industrial formulation.

Key Properties

• Appearance: Clear, colorless liquid
• Grade: ACS Reagent Grade
• Chemical Formula: H3PO4
• Assay: 75.0% – 76.5%
• Specific Gravity (20°C): 1.57 – 1.58
• Residue After Ignition: ≤ 0.1%
• Chloride (Cl): ≤ 0.5 ppm
• Heavy Metals (as Pb): ≤ 0.5 ppm
• Iron (Fe): ≤ 0.2 ppm

Common Applications

• Laboratory Reagent: Used as a standard reagent in titration methods, buffer preparation, and analytical sample preparation where low contaminant profiles are critical.
• pH Control & Water Treatment: employed to adjust and stabilize pH levels in industrial water treatment processes, assisting in scale control and neutralization.
• Metal Finishing: Integrated into formulations for cleaning, descaling, and electropolishing metal surfaces, acting as a rust inhibitor and surface preparation agent.
• Chemical Synthesis: serves as a raw material and catalyst in the production of phosphate salts, fertilizers, and other phosphate-based chemical compounds.

Safety Precautions

Phosphoric Acid is corrosive. Handle with appropriate Personal Protective Equipment (PPE), including chemical splash goggles, acid-resistant gloves, and a lab coat. Store in a cool, dry, well-ventilated area in corrosion-resistant containers (HDPE or glass). Keep away from strong bases and oxidizing agents.

Emergency Handling: In case of skin or eye contact, rinse immediately with copious amounts of water for at least 15 minutes. Refer to the Safety Data Sheet (SDS) for comprehensive hazard communication and emergency response guidelines.

Benefits

ACS Grade Purity: Meets strict American Chemical Society specifications for laboratory and analytical use.
Versatile Packaging: Available in sizes ranging from 1 Quart bottles to 330 Gallon totes to suit research or bulk production needs.
Consistent Formulation: Precise 75% concentration ensures reliable results in pH adjustment and synthesis.

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