Chemical name: Phenol-4-sulfonic acid; Phenol-4-sulfonic acid; Curing agent; p-Hydroxybenzenesulfonic acid
Product properties: This product is a light brown transparent liquid, easy to absorb moisture crystals in the air. The product is generally formulated as an aqueous solution. 
Molecular formula: C₁₂H₁₀N₂O₄S (C₁₂H₁₀N₂O₄S)
Molecular Weight: 278.2838
CAS NO.:98-67-9
Technical requirements:  
Content ≥ 65% and content ≥75%, two sizes
Uses: Phenol-4-sulfonic acid is the most important additive in the acid tin plating process, but also can be used for acid resin foaming, can also be used in organic synthesis, and is an intermediate in pharmaceuticals and dyes. 
Packing: net weight 250kg/plastic drum