4,4 ‘- diaminodistyrene 2,2′ – disulfonic acid CAS 81-11-8 , an organic chemical substance with molecular formula C14H14N2O6S2.

English alias: DASD; 4,4 ‘- diaminostilbene-2,2′ – disulphonic acid; 4,4 ‘- Diamino-2,2′ – tilbenedisulfonic acid; 2,2 ‘- (1,2-ethenediyl) bis (5-amino) benzenesulfonic acid

Chinese name: 4,4 ‘- diaminodistyrene 2,2′ – disulfonic acid

Foreign name: 4,4 ‘- Diamino-2,2′ – stilbenedisulfonic acid

Nickname: Diaminostilbene disulfonic acid; DSD acid; 4,4 ‘- Diaminostilbene-2,2′ – disulfonic acid; Glycyrrhetinic acid in water; Astragalic acid

Chemical formula: C14H14N2O6S2

Molecular weight: 370.4008

CAS login number: 81-11-8

EINECS login number: 201-325-2

Density: 1.663 g/cm ³

Physical and chemical properties

Appearance and properties: White to light yellow crystalline powder

Density: 1.662 g/cm3

Melting point: 300 ° C

Refractive index: 1.726

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