32638-88-3 Pyrogallol sulfonphthalein Benzenesulfonic acid, 2-(4,5,6-trihydroxy-3-oxo-3H-xanthen-9-yl)- Spiro(3H-2,1-benzoxathiole-3,9'-(9H)xanthene)-3',4',5',6'-tetrol, 1,1-dioxide AI3-63037 EINECS 251-134-3 CAS 32638-88-3

Purity 97%+In StockPharmaceutical Standards
CAS No.32638-88-3
Molecular FormulaC19H30O8S
Molecular Weight418.50 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

32638-88-3 Pyrogallol sulfonphthalein Benzenesulfonic acid, 2-(4,5,6-trihydroxy-3-oxo-3H-xanthen-9-yl)- Spiro(3H-2,1-benzoxathiole-3,9'-(9H)xanthene)-3',4',5',6'-tetrol, 1,1-dioxide AI3-63037 EINECS 251-134-3 CAS 32638-88-3 chemical structure

Description

32638-88-3 Pyrogallol sulfonphthalein Benzenesulfonic acid, 2-(4,5,6-trihydroxy-3-oxo-3H-xanthen-9-yl)- Spiro(3H-2,1-benzoxathiole-3,9'-(9H)xanthene)-3',4',5',6'-tetrol, 1,1-dioxide AI3-63037 EINECS 251-134-3 (CAS 32638-88-3) is a pharmaceutical standards certified reference material from CATO. Molecular formula: C19H30O8S. Molecular weight: 418.50 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.

Physical & Chemical Properties

Molecular FormulaC19H30O8S
Molecular Weight418.50 g/mol
Purity97%+
StorageStore at room temperature, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1966
Sulfur Atoms1

Related Pyrogallol Standards

Recommended Standards

Why CATO?