We supply phosphoric acid for general use in 2.5L and 25L containers, as well as 200L drums
Discounts available for bulk orders over 4 items
Full MSDS is also available to download from our website
Chemical and Physical Properties of Phosphoric Acid
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)
Common Uses of Phosphoric Acid
Manufacture of fertilisers (over 70%)
Manufacture of agricultural feeds
Used in soaps and detergents
Used in the food industry, including pet food and beverages
Used in cosmetic and personal hygiene products, in particular toothpastes
Manufacture of fire control products
Used in the textile industry
Used as a catalyst
Used in the drilling industry
How Safe is Phosphoric Acid?
As an acid, phosphoric acid can be dangerous if not handled in a safe manner.
It’s not combustible but releases toxic fumes in a fire
If in contact with skin, it may cause chemical burns and blisters. It’s also an irritant to the eyes.
If inhaled or ingested, it causes a burning sensation in the throat and difficulties breathing. It can also result in abdominal pain and collapse.
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1.684 - 1.695
84.0 - 86.0
Hazard Statement Code
Causes severe skin burns and eye damage.
Precautionary Statement Code
Do not breathe vapour/ spray.
Wear protective gloves/ protective clothing/ eye protection/ face protection.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Dispose of contents/ container in accordance with local regulations.
You can buy phosphoric acid from trusted UK chemical manufacturers, ReAgent. Shop online today where we sell phosphoric acid in a variety of pack sizes, from 2.5L containers to 200L drums and 1000L IBCs.
With discounts available on bulk orders, a promise of 24 hour shipment, and a 100% quality guarantee on all products, buying phosphoric acid has never been easier. Visit our online shop today or contact us to speak with a member of our expert team.
What is Phosphoric Acid?
Phosphoric acid, also known as orthophosphoric acid, is a colourless and viscous liquid mineral acid. It is also entirely odourless. In its pure form, phosphoric acid is a crystalline solid, although it is rarely distributed in this form. Highly concentrated phosphoric acid is classed as a corrosive. However, it is easily diluted and is classed as non-toxic when mixed with water.
The alternative term, orthophosphoric acid, is sometimes used in order to distinguish it from related phosphoric acids known as polyphosphoric acids.
What is Phosphoric Acid Used For?
Phosphoric acid has many uses both in a laboratory and in real world situations. It has proven medicinal uses in dentistry and orthodontics, and it is also commonly found in soda products as an additive. Phosphoric acid is also used in:
Electrolytes for phosphoric acid fuel cells
Removal of rust by conversion of iron oxide into ferric phosphate
In food preparation, where it is numbered as additive E338