Description

Propyl 3,4,5-Trihydroxybenzoate is a synthetic ester derivative of gallic acid, known for its potent antioxidant properties. This compound is valued for its ability to inhibit oxidation and stabilize formulations, making it a critical functional ingredient. It is primarily sought by manufacturers in the pharmaceutical, cosmetic, and food industries for use as a preservative and stabilizer.

Application

• Pharmaceutical Antioxidant: Used as an excipient in solid and liquid dosage forms to enhance the shelf-life of active pharmaceutical ingredients (APIs) susceptible to oxidative degradation.
• Cosmetic Preservative: Incorporated into skincare, haircare, and makeup formulations to prevent rancidity and protect product integrity against oxidation.
• Food & Beverage Additive: Functions as a food-grade antioxidant (E number) to preserve fats, oils, and flavorings in processed foods and nutritional supplements.
• Research & Development: Serves as a standard or intermediate in biochemical research, particularly in studies related to antioxidant activity and free radical scavenging.
• Industrial Stabilizer: Applied in polymer and lubricant formulations to prevent oxidative chain reactions that lead to material degradation.

Basic Information

Product Name	Propyl 3,4,5-Trihydroxybenzoate
CAS No.	56274-95-4
Molecular Formula	C10H12O5
Molecular Weight	212.20 g/mol
Synonyms	Propyl Gallate; Gallic Acid Propyl Ester; n-Propyl Gallate; 3,4,5-Trihydroxybenzoic Acid Propyl Ester; PG; E310; Tenox PG; Progallin P
EINECS	260-122-0

Quality Control

Our Propyl 3,4,5-Trihydroxybenzoate is manufactured under a strict quality management system. Each batch is tested to meet relevant specifications for food (FCC), pharmaceutical (USP/EP), and industrial grades. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with every shipment to ensure full traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at 15-25°C. This product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve efficacy.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	148°C - 152°C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.