Phenoldisulfonic acid

• CAT Number: M011640
• CAS Number: 96-77-5
• Molecular Formula: C6H6O7S2
• Molecular Weight: 254.23
• Purity: ≥95%
• Storage: -20°C
• IUPAC Name: 4-hydroxybenzene-1,3-disulfonic acid
• InChI: InChI=1S/C6H6O7S2/c7-5-2-1-4(14(8,9)10)3-6(5)15(11,12)13/h1-3,7H,(H,8,9,10)(H,11,12,13)
• InChIKey: JXBUOZMYKQDZFY-UHFFFAOYSA-N
• SMILES: C1=CC(=C(C=C1S(=O)(=O)O)S(=O)(=O)O)O

Phenoldisulfonic acid（Cat No.:M011640）, is a strong aromatic sulfonic acid. It is a white to pale yellow solid that is highly soluble in water. This compound is widely used in the chemical industry as a powerful sulfonating agent and a key intermediate in the synthesis of various organic compounds. Phenoldisulfonic acid is employed in the production of dyes, pigments, and phenolic resins, where it plays a crucial role in introducing sulfonic acid groups to enhance solubility and reactivity.

Reference

1: Sung FC. Study of modification of the phenoldisulfonic acid method for the
determination of nitrate nitrogen. Taiwan Yi Xue Hui Za Zhi. 1970 Aug
28;69(8):393-8. PubMed PMID: 5274230.

2: Fisher GE, Huls TA. A comparison of phenoldisulfonic acid, nondispersive
infrared, and Saltzman methods for the determination of oxides of nitrogen in
automotive exhaust. J Air Pollut Control Assoc. 1970 Oct;20(10):666-71. PubMed
PMID: 4096984.