Ammonium sulphate (E517)

No. Ammonium sulphate (E517) is not one of the markers Open Food Facts uses to classify a food as processed or ultra-processed, so on its own it doesn't raise a product's NOVA group.

What it is

A food additive authorised for industrial food production.

A product that contains it can still be ultra-processed for other reasons: 33 of the 36 products here that contain ammonium sulphate (E517) (92%) are in group 4 because of other ingredients or additives.

More about ammonium sulphate (E517) on Wikidata

Where it turns up

Ammonium sulphate (E517) appears in 36 of the 40,000 products on this site (0%).

Products containing ammonium sulphate (E517)

How the NOVA classification works