Sulfosalicylic Acid
Title: Sulfosalicylic Acid
CAS Registry Number: 97-05-2
CAS Name: 2-hydroxy-5-sulfobenzoic acid
Additional Names: 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.

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