Pyrogallol

Pyrogallol (CAS 87-66-1), also sold under the trade names Piral, Fourrine PG, and Fourrine 85, is a trihydric phenol used industrially as an antioxidant and reducing agent. It serves as a fixative across pharmaceutical, cosmetic, and specialty chemical applications. Its strong reducing capacity makes it a functional ingredient in formulations requiring controlled oxidation.

In hair dye and cosmetic colorant systems, it acts as an oxidative dye coupler, contributing to brown and black shades in professional and consumer hair color products for the beauty industry. Pharmaceutical manufacturers use it as an intermediate in the synthesis of active compounds and as an antioxidant stabilizer in sensitive formulations to ensure long-term product stability and efficacy.

In photographic and analytical chemistry applications, it functions as a developing agent and oxygen-absorbing reagent. Food-contact and packaging applications also draw on its antioxidant properties. These properties protect against oxidative degradation in material formulations. The product is supplied as a white to off-white crystalline powder for various industrial and laboratory uses.

Technical and reagent-grade specifications are standard across the market, with pharmaceutical-grade material available to meet compendial purity requirements for high-specification manufacturing projects. Packaging typically ranges from kilogram-scale laboratory quantities to multi-hundred kilogram bulk orders depending on grade and supplier requirements for global distribution and logistics.