Propyl Gallate

Propyl Gallate

AKA “121-79-9, Propyl 3, 4, 5-trihydroxybenzoate, N-Propyl gallate, Progallin P, Gallic acid, propyl ester, Tenox PG, Nipagallin P, Gallic acid propyl ester, NIPA 49”

Antioxidant

Ingredient Facts

Propyl gallate

AKA: 121-79-9, Propyl 3, 4, 5-trihydroxybenzoate, N-Propyl gallate, Progallin P, Gallic acid, Propyl ester, Tenox PG, Nipagallin P, Gallic acid propyl ester, NIPA 49

Antioxidant · Antioxidant · EWG: 4

Synthetic

Antioxidant

Fragrance

Phenolic Acid

Not Clean

Propyl 3,4,5-trihydroxybenzoate

Solubility less than 1 mg/mL at 68 °F (NTP, 1992)

Formula

C10H12O5

Mol. Weight

212.20

CAS #

121-79-9

Form

Liquid

State

Propyl gallate appears as fine white to creamy-white crystalline powder. Odorless or with a faint odor. Melting point 150 °C. Insoluble in water. Slightly bitter taste.

See origin →

Functions

Antioxidant

Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.

Perfuming

Added for scent. Can be natural or synthetic. Common irritant and allergen — one of the top reasons people react to products.

Neutralizes Free Radicals

Traditional Use

Developed in the early 20th century as a synthetic antioxidant derived from gallic acid (found in plant tannins). Used since the 1940s in cosmetics and food preservation to prevent oxidative degradation and rancidity in formulations containing oils.