Title: Sulfosalicylic Acid
CAS Registry Number: 97-05-2
CAS Name: 2-hydroxy-5-sulfobenzoic acid
Synonyms: 3-carboxy-4-hydroxybenzenesulfonic acid; 5-sulfosalicylic acid; 2-hydroxybenzoic-5-sulfonic acid; salicylsulfonic acid
Molecular Formula: C7H6O6S
Molecular Weight: 218.18
Percent Composition: C 38.53%, H 2.77%, O 44.00%, S 14.70%
Literature References: Prepn: Pusca
et al., Rev. Chim. (Bucharest) 13, no. 1, 49-50 (1962),
C.A. 57, 14994b (1962).
Derivative Type: Dihydrate
Properties: White crystals or cryst powder. Colored pink by traces of iron. mp ~120° when anhydr; at higher temp dec into phenol and salicylic acid. Very sol in water or alcohol; sol in ether. Generally sol in polar solvents.
Keep well closed and protected from light.
Melting point: mp ~120° when anhydr
CAUTION: Irritating to skin, mucous membranes.
Use: Clinical reagent for albumin in urine; colorimetric reagent for ferric ion with which it gives a violet color. It is a trifunctional aromatic compound, undergoing reactions typical of phenols, carboxylic and sulfonic acid groups. Suggested industrial uses: metal chelating agent, intermediate in the manuf of surface-active agents, organic catalysts and grease additives.
