77172-72-6 3,4,5,6-Tetrabromophenolsulfonephthalein Phenol, 4,4'-(4,5,6,7-tetrabromo-3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide 3456-Tbsp 4,4'-(4,5,6,7-Tetrabromo-3H-2,1-benzoxathiol-3-ylidene)bisphenol S,S-dioxide Tetrabromosulfonephthalein NSC 624919 CAS 77172-72-6

Purity 97%+In StockPharmaceutical Standards
CAS No.77172-72-6
Molecular FormulaC19H28Br4O5S
Molecular Weight688.10 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

77172-72-6 3,4,5,6-Tetrabromophenolsulfonephthalein Phenol, 4,4'-(4,5,6,7-tetrabromo-3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide 3456-Tbsp 4,4'-(4,5,6,7-Tetrabromo-3H-2,1-benzoxathiol-3-ylidene)bisphenol S,S-dioxide Tetrabromosulfonephthalein NSC 624919 CAS 77172-72-6 chemical structure

Description

CATO supplies 77172-72-6 3,4,5,6-Tetrabromophenolsulfonephthalein Phenol, 4,4'-(4,5,6,7-tetrabromo-3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide 3456-Tbsp 4,4'-(4,5,6,7-Tetrabromo-3H-2,1-benzoxathiol-3-ylidene)bisphenol S,S-dioxide Tetrabromosulfonephthalein NSC 624919 (CAS 77172-72-6), a certified reference material (molecular formula C19H28Br4O5S, MW 688.10 g/mol) for analytical method development and quality control.

Owing to a steroid core, a sulfone group, a hydroxyl group, an ether linkage, bromine substitution, 77172-72-6 3,4,5,6-Tetrabromophenolsulfonephthalein Phenol, 4,4'-(4,5,6,7-tetrabromo-3H-2,1-benzoxathiol-3-ylidene)bis-, S,S-dioxide 3456-Tbsp 4,4'-(4,5,6,7-Tetrabromo-3H-2,1-benzoxathiol-3-ylidene)bisphenol S,S-dioxide Tetrabromosulfonephthalein NSC 624919 is typically off-white to pale yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 688.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC19H28Br4O5S
Molecular Weight688.10 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; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1979
Halogen ContentBr-containing
Sulfur Atoms1

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