5-Sulfosalicylic acid dihydrate is a sulfonated salicylic acid derivative.
Strong association with a range of metals makes 5-Sulfosalicylic acid useful as a metal scavenger.
It forms proton-transfer dye complexes with diazo compounds such as 4-(phenyldiazenyl)aniline. Proteins are precipitated upon complexation with 5-Sulfosalicylic acid, allowing qualitative analysis of the resultant turbidity formed in a sample by these complexes leaving solution.
Protein precipitation with 5-Sulfosalicylic acid has also been employed as a preparative measure for removing proteins prior to chromatographic analysis.
Minimum Assay: >99.0 %
Molecular Formula C7H6O6S.2H2O
Molecular Weight 254.22 g/mol
Melting Point: 224
Boiling Point: >120 deg C
Free salicylic acid Max. 0.04 %
Heavy metals (as Pb) Max. 10 ppm
Ignition residue (SO4) Max. 0.1 %
Insolubility in NH3 4 N Max. 0.03 %
Insolubility in ethanol 96 % vol Max. 0.1 %
Insolubility in water Max. 50 ppm
Cl (Chloride) Max. 10 ppm
Fe (Iron) Max. 10 ppm
Refractive Index: n20D ~1.65
Cas Number: 5965-83-3
Einecs Number: 202-555-6
HS Code / Commodity Code: 2918291000
UN Number: 3261
Hazard Phrases: H314
Prec Phrases: P260,P280,P301+P330+P331,P303+P361+P353,P304+P340,P310,P305+P351+P338