Phosphoric Acid 85% (General Use)

Buy Phosphoric Acid from Trusted UK Chemical Suppliers

Phosphoric Acid 85% is a versatile, high-purity mineral acid used across a wide range of industries from water treatment and fertiliser production to food, cosmetics, and metal processing. Supplied in robust 25 L containers, our general-use phosphoric acid is manufactured and quality-checked under ISO-certified systems to ensure reliability and consistency in every batch.

Key properties include:

• Name: Phosphoric acid
• Alternative names: Orthophosphoric acid
• Molecular formula: H3PO4
• Molecular weight: 97.996 g/mol
• Appearance: Hygroscopic colourless crystals, forming a viscous solution in water
• Odour and taste: Odourless but with an acid taste
• Boiling point: 407°C (415°F)
• Melting point: 42.4°C (108°F)
• Solubility: Soluble in water, alcohol, and ether
• Decomposition: Converts to pyrophosphoric acid (H4P2O7) when heated to over 200°C
• Corrosivity: Corrosive to ferrous metals and alloys
• Acidity: pH around 1.5 in aqueous solution (0.1N)

Whether you need phosphoric acid for cleaning, blending, or formulation, ReAgent provides a dependable supply backed by full technical documentation and expert support.

Common Uses of Phosphoric Acid

Phosphoric Acid is one of the most widely used inorganic acids due to its moderate strength and diverse reactivity profile. Typical applications include:

• Agriculture and Fertilisers – Over 70% of global phosphoric acid production is used to manufacture phosphate fertilisers and agricultural feed supplements
• Water Treatment – Used to control scale, corrosion, and pH in municipal and industrial water systems
• Cleaning & Metal Processing – Effective rust remover and metal brightener; used in pickling and surface preparation
• Soaps, Detergents & Cosmetics – Serves as a pH adjuster and buffering agent in cleaning products, shampoos, and toothpastes
• Food & Beverage Industry – Utilised as an acidity regulator and flavour enhancer in soft drinks, pet food, and other food applications
• Textile & Dye Manufacture – Used in textile finishing, fibre treatment, and dye setting
• Chemical Manufacturing & Catalysis – Common catalyst or reagent in organic and inorganic synthesis
• Fire Control & Antifreeze Products  – Key component in fire retardants and some antifreeze formulations

Storage Recommendations

Due to the corrosive nature of phosphoric acid, we recommend:

• Store in tightly sealed, corrosion-resistant containers
• Keep in a cool, dry, well-ventilated area (15–25 °C)
• Segregate from bases, chlorates, and strong oxidisers
• Do not store in metal containers – use HDPE or compatible plastic drums
• Ensure secondary containment to prevent environmental release

For comprehensive information, always consult the full Safety Data Sheet before use.

Why Choose ReAgent for Phosphoric Acid?

At ReAgent, we’ve been manufacturing and supplying high-quality chemicals – including phosphoric acid – for over 50 years. As an ISO 9001:2015, ISO 14001:2015, and ISO 13485:2016 accredited company, we’re committed to maintaining the highest standards in quality, environmental management, and medical-grade production.

We offer phosphoric acid in standard 25 L containers, as well as in custom bulk quantities to suit your specific requirements. Our in-house capabilities also allow us to provide bespoke dilutions and private-label packaging.

With nationwide ADR-compliant delivery, we ensure that your order arrives safely and on time wherever you are in the UK. Plus, our dedicated technical team is here to support you before, during, and after your purchase, so you can rely on expert advice at every stage.