What is E466?

Carboxymethyl cellulose (CMC) or cellulose gum is a cellulose derivative with carboxymethyl groups (-CH2-COOH) bound to some of the hydroxyl groups of the glucopyranose monomers that make up the cellulose backbone. It is often used in its sodium salt form, sodium carboxymethyl cellulose. E466 sits in the E400–E499 series, which in the EU classification mainly covers thickeners, stabilisers and emulsifiers.

What is E466 used for?

E466 belongs to the thickeners group. Thickeners and gelling agents give food texture and body. Many come from plants, like pectin and guar gum.

Is E466 safe?

E466 is rated “moderate”. It is approved for use in food, but some people prefer to limit it. “Moderate” means it is approved, but is debated or something some people prefer to limit.

How E466 appears on labels

On food packaging you'll find E466 either as the number “E466” or by the name “Carboxy methyl cellulose” in the ingredient list, often after its function. Ingredients are listed in descending order by weight, so an additive near the end is present only in small amounts.

Is E466 vegan?

Yes, E466 is suitable for vegans.