Question

which substance is used in lotions and cosmetics?
o ammonium hydroxide
o acetic acid
o formic acid
o zinc hydroxide

Explanation:

Acetic acid is used in some cosmetics for pH - adjustment. Ammonium hydroxide, formic acid, and zinc hydroxide are not commonly used in lotions and cosmetics in general. Acetic acid can be found in some products for its mild acidic properties to help with formulation stability and skin - friendly pH levels.

Answer:

acetic acid