Metol
Metol (CAS: 55-55-0), chemically p-methylaminophenol sulfate, is a developing agent historically central to black-and-white photographic processing. This white crystalline compound reduces exposed silver halide crystals to metallic silver while leaving unexposed crystals intact, producing the negative image with fine grain and excellent tonal gradation. Its ability to develop in solution without additional alkali and its low fogging tendency made it the standard developer component for films and papers throughout the analog photography era. Beyond photography, metol serves as an intermediate for dyes and pigments, an antioxidant in rubber processing, and as a chemical intermediate for pharmaceutical compounds. While digital imaging has reduced photographic demand, metol remains available for specialty photographic art, industrial radiography, and niche chemical synthesis requiring its selective reducing properties.
– Photographic Development: Used as a primary developing agent in black-and-white film and paper developers producing fine grain and rich tonal gradation.
– Dye and Pigment Intermediate: Serves as a building block for azo dyes and color couplers in specialty coloration chemistry.
– Rubber Industry: Applied as an antioxidant and stabilizer protecting rubber compounds from oxidative degradation.
– Chemical Synthesis: Employed as a reducing agent and intermediate for pharmaceutical and fine chemical manufacturing.
Product Name: Metol
For global customers, we provide complete technical documentation to support product evaluation, regulatory compliance and safe handling during transportation and application.