Are Phosphoric Acid and Phosphates Halal?

Phosphoric acid (E338) and the phosphate salts (E339–E343, E450–E452) are mineral additives, and they are Halal.^[3][5] They give colas their tang, help baking powder rise, and keep processed cheese smooth.

One acid, many salts

Food-grade phosphoric acid is refined from phosphate rock. React it with sodium, potassium, calcium or magnesium and you get the salts that carry the other codes:^[1]

• E338 – phosphoric acid. The sharp acidity in colas and some fruit drinks.
• E339 and E340 – sodium and potassium phosphates. Emulsifying salts that stop processed and sliced cheese from separating when it melts.
• E341 – calcium phosphates. Raising acids in baking powder and self-raising flour, and anti-caking agents in powders.
• E450 – diphosphates. Sodium acid pyrophosphate is the slow-acting acid in many baking powders and in ready-made batters.
• E451 and E452 – triphosphates and polyphosphates. Help injected meats, prawns and frozen fish hold water.

US rules list phosphoric acid as a generally recognised food substance, and certifier E-number lists put the group with the minerals that need no source check.^[2][6]

Not to be confused with bone phosphate

The one animal route in this family has a different code. Edible bone phosphate, E542, is made from animal bones and needs a source check; it has its own page. A label that lists E338–E343 or E450–E452 is not bone phosphate.

Where the real question sits

Phosphates are often a sign of a processed product, and it is the rest of that product that matters. In a cola, look at the brand's flavouring statement; in a cheese slice, the rennet; in a ham, sausage or injected chicken, the meat itself and whether it was slaughtered Islamically. The phosphate is never the reason a product is doubtful.