3,4-Dichlorobenzo[b]thiophene-2-carbonyl chloride CAS 34576-86-8
| CAS No. | 34576-86-8 |
| Molecular Formula | C9H3Cl3OS |
| Molecular Weight | 265.54 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
3,4-Dichlorobenzo[b]thiophene-2-carbonyl chloride (CAS 34576-86-8), molecular formula C9H3Cl3OS and molecular weight 265.54 g/mol, is a CATO reference standard with documented purity and traceability.
3,4-Dichlorobenzo[b]thiophene-2-carbonyl chloride (C9H3Cl3OS) contains sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H3Cl3OS |
| Molecular Weight | 265.54 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Dichlorobenzo Standards
- 2,3-dichlorobenzo[f]quinoxaline (CAS 26907-93-7)
- 1,3-Dichlorobenzo[4,5]imidazo[1,2-a]pyridine-4-carbonitrile (CAS 170894-91-4)
- 3,6-Dichlorobenzo[b]thiophene-2-carbohydrazide (CAS 329219-49-0)
- N-(4,7-Dichlorobenzo[d]thiazol-2-yl)acetamide (CAS 868230-30-2)
- Methyl 3,4-dichlorobenzo[b]thiophene-2-carboxylate (CAS 444905-19-5)
- Methyl 3,6-dichlorobenzo[b]thiophene-2-carboxylate (CAS 21211-18-7)
- 6,7-Dichlorobenzo[4,5]imidazo[2,1-b]thiazol-3(2H)-one (CAS 866144-64-1)
- 2,4-Dichlorobenzo[4,5]thieno[3,2-d]pyrimidine (CAS 160199-05-3)
Recommended Standards
- 5-bromo-4-(tert-butoxy)-2-chloropyrimidine (CAS 57054-94-1)
- 34576-85-7 3,6-Dichloro-1-benzothiophene-2-carbonyl chloride DTXSID20372716 (CAS 34576-85-7)
- 4-Bromo-5-chloro-2-(isopropylamino)pyridine 1-oxide (CAS 869886-91-9)
- 1-Bromo-5-tert-butyl-3-chloro-2-fluorobenzene (CAS 1881289-47-9)
- 2-{8-oxatricyclo[7.4.0.0,2,7]trideca-1(9),2,4,6-tetraen-4-yloxy}acetic acid (CAS 34855-08-8)
- 2-((3,4-Dimethoxybenzyl)amino)-1,1-bis(4-fluorophenyl)ethan-1-ol (CAS 338771-06-5)
- Methyl 6-(Bromomethyl)-2-naphthoate (CAS 56358-60-2)
- 3-Benzenesulfonamido-3-[4-(propan-2-yl)phenyl]propanoic acid (CAS 861207-56-9)
- 4,6-Dimethyl-2-(prop-2-yn-1-ylamino)nicotinic acid (CAS 1178030-23-3)
- N-(4-methoxyphenyl)-1-methyl-3-(trifluoromethyl)-1H-pyrazole-4-carboxamide (CAS 477709-58-3)
- 2-Fluoro-3-isopropoxy-5-methylphenylboronic acid (CAS 2096336-18-2)
- Ethylhexyl Triazone (CAS 88122-99-0)
- Iodomethyl methyl ether (CAS 13057-19-7)
- Tyr-Proinsulin C-Peptide (55-89) (human) (CAS 139532-11-9)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com