Phosphoric Acid

Phosphoric Acid

CAS Number: 7664‑38‑2

Synonyms: Orthophosphoric acid; 85% Phosphoric Acid; E338; Food‑grade Phosphoric Acid

Chemical Formula:H₃PO₄

Product Introduction

A colorless, odorless, viscous liquid (~85% concentration) used as an acidulant, flavor enhancer, preservative, and pH regulator in food and beverages (e.g., colas, jams, cheeses), while also used industrially for cleaning and water treatment.

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Physical & Chemical Properties

Property Value
Appearance Clear, colorless viscous liquid (~85%)
pH (conc.) ~2.2–2.4
Specific Gravity @ 25 °C ~1.685 g/mL
Purity / P₂O₅ content ~61.6% P₂O₅ (85% H₃PO₄)
Solubility in Water Miscible
Viscosity Relatively high due to acidity
Hygroscopicity Hygroscopic; absorbs moisture

Applications

  • Food & beverage: acidulant in colas, fruit drinks; preservative in canned/jarred foods, dairy, cheese, jams/jellies
  • Bakery/meat processing: dough conditioner; curing agent
  • Industrial use: sanitizer, cleaner, pH adjuster in water and metal treatment

Safety & Hazards

  • Corrosive; may cause burns. Use acid-resistant PPE and proper ventilation. Storage requires corrosion-resistant containers. Food-grade quality verified by FDA/EFSA standards.

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