Sodium p-phenolsulfonate

Sodium p-phenolsulfonate (CAS 825-90-1), also known as sodium 4-hydroxybenzenesulfonate, is an aromatic sulfonate salt.

Where is Sodium p-phenolsulfonate used?

• Textile and leather processing: improves dye uptake and fiber wetting for more uniform color distribution
• Personal care: preservative booster or antimicrobial component in rinse-off and leave-on products
• Paper manufacturing: supports surface treatment with controlled wetting and fiber interaction
• It also serves as a synthetic intermediate for sulfonated phenolic compounds used in pigment and colorant chemistry.

Good to know: Anhydrous grades are the standard for most industrial applications; technical-grade material is the most common supply specification, though higher-purity grades are available for personal care and specialty formulation use.

Commercial specifications

• Anhydrous and hydrated forms
• Technical grade; higher-purity grades for personal care and specialty formulation