Sulfosalicylic Acid

Sulfosalicylic Acid
2-Hydroxy-5-sulfobenzoic acid
Chemical FormulaHOC6H3(COOH)SO3H·2H2O
Formula Weight254.22
Equivalent Weight127.11 (Molar = 2 Normal)
CAS No.5965-83-3

Sulfosalicylic Acid solutions can be assayed with standardized Sodium Hydroxide solutions using Phenolphthalein Indicator according to the following reaction:

HOC6H3(COOH)SO3H + 2 NaOH → HOC6H3(COONa)SO3Na + 2 H2O

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