Phosphoric Acid 85% - Technical Grade

Product Overview

Phosphoric Acid 85% - Technical Grade (Orthophosphoric Acid, H₃PO₄) is a concentrated, clear, colorless liquid engineered for demanding industrial applications. This high-purity solution is optimized for metal finishing, fertilizer manufacturing, and precise pH control in chemical processing. With a typical assay of 86.5% and a specific gravity of approximately 1.69 g/mL, it ensures consistent dosing and reaction rates in downstream operations.

As a strong mineral acid, this technical grade specification restricts trace metals and impurities, making it suitable for chemical synthesis and rust conversion protocols. While it meets ACS Reagent Grade compliance for certain specifications, it is formulated strictly for industrial use. It effectively passivates metal surfaces to prevent corrosion and serves as a primary source of phosphorus in agricultural formulations.

Key Properties

• Appearance: Clear, colorless liquid
• Chemical Formula: H₃PO₄ (Orthophosphoric Acid)
• Concentration: 85% Technical Grade
• Specific Gravity (20°C): 1.69 (typical)
• Boiling Point: 158 °C
• Chloride (Cl⁻): Max 500 ppm
• Sulfate (SO₄²⁻): Max 2000 ppm
• Heavy Metals (as Pb): Max 10 ppm
• Iron (Fe): Max 2 ppm
• Solubility: Miscible in water

Common Applications

• Metal Treatment & Finishing: Acts as a rust converter and passivation agent, preparing steel surfaces for coating by converting iron oxide into iron phosphate.
• Fertilizer Production: A primary feedstock for the synthesis of phosphate-based fertilizers and nutrient solutions.
• Industrial pH Control: Used to neutralize alkaline solutions in wastewater treatment and chemical processing streams.
• Chemical Synthesis: Essential reagent for manufacturing phosphates, activated carbon, and electrolytes.
• Cleaning Agents: Formulated into industrial cleaners for removing mineral deposits and hard water stains.

Safety Precautions

Phosphoric Acid is corrosive to skin, eyes, and metal. Handle with full Personal Protective Equipment (PPE), including acid-resistant gloves, chemical splash goggles, and face shields. Ensure use in well-ventilated areas. Store in a cool, dry place in corrosion-resistant containers (HDPE or glass), away from alkalis and reactive metals.

Shipping Information: This product is regulated as a hazardous material. UN 1805, Class 8, Packing Group III.

Benefits

High Concentration – 85% strength allows for economical dilution and efficient bulk storage.
Technical Purity – Controlled impurity profile ensures reliable performance in manufacturing and synthesis.
Versatile Utility – Effective for both aggressive rust removal and delicate pH adjustment.
Scalable Packaging – Available in sizes from 1 Quart to 330 Gallon Totes to suit lab or plant requirements.

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