Ammonium alum is an inorganic chemical compound, hydrated natural double aluminium sulphate mineral salt usually existing as dodecahydrate or aluminium ammonium sulphate and produced by recovering alumina from clay.

Safety
Aluminium can interfere with different biological processes (cellular oxidative stress, calcium metabolism, etc.), so it can induce toxic effects in different organs and systems, and the nervous system is the main target of its toxicity.

What it is used for and where
It is used in vegetable glues, tanning, dyeing and fireproofing.
Animal repellent.
Coagulant for water purification.
Listed in the European food additives list under number E520 as a firming agent.
Production of dyes,
Paper industry.
Deodorants.

Cosmetics
Cosmetic astringent. This ingredient exerts a direct effect on the skin by tightening dilated pores by contracting stratum corneum cells and removing superfluous oil.
Synonyms: EC number 232-055-3

CAS: 7784-25-0