1,2,4-Trimethyl-5-benzenesulfonic acid 2,4,5-Trimethylbenzenesulfonic acid CAS NO: 3453-84-7 molecular formula :C9H12SO3 molecular weight : 200.25 Contents : ≥98.5% Melting point :110.5-112℃ Appearance:White or light yellow crystallinepowder Packaging: 25 kg / cardboard drum Henan Province Hengyu Solvent Co,.Ltd