5,7-Dichloro-3-methylbenzo[b]thiophene-2-sulfonyl chloride CAS 338796-99-9

Purity 97%+In StockPharmaceutical Standards
CAS No.338796-99-9
Molecular FormulaC9H5Cl3O2S2
Molecular Weight315.62 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5,7-Dichloro-3-methylbenzo[b]thiophene-2-sulfonyl chloride CAS 338796-99-9 chemical structure

Description

Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5,7-Dichloro-3-methylbenzo[b]thiophene-2-sulfonyl chloride.

CATO supplies 5,7-Dichloro-3-methylbenzo[b]thiophene-2-sulfonyl chloride (CAS 338796-99-9), a certified reference material (molecular formula C9H5Cl3O2S2, MW 315.62 g/mol) for analytical method development and quality control.

Structurally, 5,7-Dichloro-3-methylbenzo[b]thiophene-2-sulfonyl chloride (C9H5Cl3O2S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 315.62 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

As a certified reference material (CRM), 5,7-Dichloro-3-methylbenzo[b]thiophene-2-sulfonyl chloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC9H5Cl3O2S2
Molecular Weight315.62 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions
Degree of Unsaturation (DBE)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2025
Halogen ContentCl-containing
Sulfur Atoms2

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