Na hydrogen phosphate

A salt or ester of acetic acid, can be used as a solvent or pH adjuster.

pH adjuster that can also have mild exfoliating properties.

pH adjuster and mild exfoliant.

Likely a misspelling of 'acide citrique' (citric acid), used as a pH adjuster.

The French name for Citric Acid, used as a pH adjuster and antioxidant.

Citric acid is a pH adjuster and exfoliant; Ascorbic acid is Vitamin C, an antioxidant.