Propyl Gallate

Propyl Gallate (PG) is a phenolic antioxidant used to help delay oxidative rancidity in fats, oils and fat-containing products. It is a white to creamy-white crystalline powder.

Appearance:
White crystal or light white powder
CAS No.:
121-79-9
Molecular Formula:
C10H12O5
Molecular Weight:
212.2
EINECS:
204-498-2
Solubility:
Insoluble in water

Availability:



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Product Description

Product Description

Propyl gallate is the propyl ester of gallic acid. It is identified as INS 310 and, in the EU, E 310. The required quality grade, permitted uses and dosage depend on the application and destination market.

Technical Specifications

Item	Specification
Appearance	White to creamy-white crystalline powder
Assay, dried basis	98.0%–102.0%
Melting Range, after drying	146–150°C
Loss on Drying	≤0.5%
Residue on Ignition	≤0.1%

Specifications should match the agreed grade and current COA.

Packaging and Storage

Packaging: 25 kg fiber drum.
Storage: Keep tightly closed in a cool, dry, well-ventilated place, protected from light and moisture.
Contamination control: Avoid contamination with iron or iron salts, which may cause discoloration. Separate from incompatible materials listed in the SDS.

Key Applications

1. Food Industry

Fats and oils: Helps delay oxidative rancidity in permitted applications.
Fat-containing foods: Used in selected products such as chewing gum and bakery formulations where authorized.
Use conditions: Select food-grade material and follow the destination market’s food-category and dosage requirements.

2. Cosmetics and Personal Care

Formulation protection: Helps limit oxidation of oil-containing ingredients.
Product examples: Selected creams, lotions and lip products, subject to formulation compatibility and safety assessment.

3. Pharmaceuticals

Excipient function: Used as an antioxidant in selected pharmaceutical formulations.
Grade selection: Assess the applicable quality standard and supporting documentation for the intended formulation.

4. Industrial and Laboratory Uses

Industrial formulations: Antioxidant applications include selected adhesives and lubricating oil systems.
Fluorescence microscopy: Suitable laboratory grades are used in anti-fade preparations to reduce photobleaching.

Safety and Handling

Minimize airborne dust and use suitable ventilation.
Wear protective gloves and eye protection; avoid skin contact and ingestion.
PG can cause skin sensitization. Follow the current SDS when handling the raw material.
Prevent release to drains and waterways.

Frequently Asked Questions

Is Propyl Gallate an Antioxidant or an Antimicrobial Preservative?

Its main function here is to slow oxidation and rancidity. It should not be assumed to replace an antimicrobial preservative system.

Can Propyl Gallate Be Used in All Foods?

No. Permitted categories and limits vary by market. For example, U.S. 21 CFR 184.1660 limits total antioxidants under that provision to 0.02% of the food’s fat or oil content, not its total weight.

Can Propyl Gallate Be Combined with TBHQ?

Do not assume this combination is permitted for food use. U.S. 21 CFR 172.185 lists TBHQ alone or with BHA and/or BHT; PG is not listed in that combination provision. Check the applicable market requirements before selecting a blend.