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: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 224
Boiling Point:Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â >120 deg C
Free salicylic acid            Max. 0.04 %
Heavy metals (as Pb) Â Â Â Â Â Max. 10 ppm
Ignition residue (SO4) Â Â Â Â Max. 0.1 %
Insolubility in NH3Â 4 N Â Â Â Â Max. 0.03 %
Insolubility in ethanol 96 % vol           Max. 0.1 %
Insolubility in water        Max. 50 ppm
Cl (Chloride) Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Max. 10 ppm
Fe (Iron) Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Max. 10 ppm
Refractive Index:Â Â Â Â Â Â Â Â Â Â Â n20DÂ ~1.65
Cas Number:Â 5965-83-3
Einecs Number:Â 202-555-6
HS Code / Commodity Code:Â 2918291000
UN Number:Â 3261
Hazard Phrases:Â H314
Prec Phrases:Â P260,P280,P301+P330+P331,P303+P361+P353,P304+P340,P310,P305+P351+P338
