5-Sulfosalicylic acid dihydrate

CAS Number:


Linear Formula:

HO3SC6H3-2-(OH)CO2H 2H2O

Molecular Weight:


Description: white crystalline powder


assay ≥99%
99.0-101.0% (ACS specification)
mp 105-110 C(lit.)
anion traces chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.02%
cation traces Fe: ≤0.001%
heavy metals: ≤0.002%
impurities ≤0.02% insolubles
≤0.04% salicylic acid
ign. residue ≤0.1%

Safety Information

Symbol GHS07
Signal word Warning
EC Number 202-555-6
Hazard statements H315-H319-H335
Risk Statements (Europe) 22-36/37/38
Hazard Codes (Europe) Xn
Safety Statements (Europe) 26-36/37/39-45
WGK Germany 3


Spray reagent for the detection of amino acids on TLC plates. Doping agent for polyaniline.,Used in urine tests to determine urine protein content


Sulfosalicylic acid; 2-Hydroxy-5-sulfobenzoic acid; 3-carboxy-4-hydroxybenzenesulfonic acid; 2-Hydroxybenzoic-5-sulfonic acid; 5-Sulfosalicylic acid; 5-Sulfosalicylic acid dihydrate; Salicylsulfonic acid; 5-Sulfosalicylsyre; 5-Sulfosalicylsaeure;