3-Chlorobenzothiophene-2-carbonyl chloride 3-chlorobenzo[b]thiophen-2-carbonyl chloride 3-chlorobenzo[b]thiophene-2-carbonyl chloride 3-chloro-1-benzothiophene-2-carbonyl chloride 3-chloro-benzo[b]thiophene-2-carbonyl chloride 21815-91-8 CAS 21815-91-8
| CAS No. | 21815-91-8 |
| Molecular Formula | C9H4Cl2OS |
| Molecular Weight | 231.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 3-Chlorobenzothiophene-2-carbonyl chloride 3-chlorobenzo[b]thiophen-2-carbonyl chloride 3-chlorobenzo[b]thiophene-2-carbonyl chloride 3-chloro-1-benzothiophene-2-carbonyl chloride 3-chloro-benzo[b]thiophene-2-carbonyl chloride 21815-91-8 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 231.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
3-Chlorobenzothiophene-2-carbonyl chloride 3-chlorobenzo[b]thiophen-2-carbonyl chloride 3-chlorobenzo[b]thiophene-2-carbonyl chloride 3-chloro-1-benzothiophene-2-carbonyl chloride 3-chloro-benzo[b]thiophene-2-carbonyl chloride 21815-91-8 (CAS 21815-91-8), molecular formula C9H4Cl2OS and molecular weight 231.10 g/mol, is a CATO reference standard with documented purity and traceability.
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), 3-Chlorobenzothiophene-2-carbonyl chloride 3-chlorobenzo[b]thiophen-2-carbonyl chloride 3-chlorobenzo[b]thiophene-2-carbonyl chloride 3-chloro-1-benzothiophene-2-carbonyl chloride 3-chloro-benzo[b]thiophene-2-carbonyl chloride 21815-91-8 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 Formula | C9H4Cl2OS |
| Molecular Weight | 231.10 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.) | 1963 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chlorobenzothiophene Standards
- Methyl 6-Chlorobenzothiophene-2-carboxylate (CAS 104795-85-9)
- 5-Chlorobenzothiophene-2-sulfonyl Chloride (CAS 128851-98-9)
- 6-chlorobenzothiophene-2-sulfonyl chloride (CAS 128852-07-3)
- 7-chlorobenzothiophene-2-sulfonyl chloride (CAS 128852-08-4)
- 7-chlorobenzothiophene-3-sulfonyl chloride (CAS 30214-09-6)
Recommended Standards
- Octylphosphonic dichloride (CAS 3095-94-1)
- (4-Bromothiophen-2-yl)(cyclopropyl)methanone (CAS 1065185-71-8)
- 5-Chloro-4-(4-chlorophenyl)-1,2,3-thiadiazole (CAS 338407-87-7)
- (5-Bromothiophen-2-yl)(cyclopropyl)methanone (CAS 1216229-49-0)
- 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-Indole (CAS 388116-27-6)
- [3-fluoro-4-(2-fluorophenoxy)phenyl]methanamine (CAS 1038721-54-8)
- 7-Hydroxy-2-isopropyl-3-(p-tolyl)quinazolin-4(3H)-one (CAS 871814-53-8)
- 5-Benzoyl-2-hydroxybenzaldehyde (CAS 14898-78-3)
- 1-(4-Fluorophenyl)-1,4-dihydropyrazine-2,3-dione (CAS 892293-51-5)
- 3-Iodo-6-methyl-1,4,6,7-tetrahydropyrano[4,3-c]pyrazole (CAS 2329572-80-5)
- 3-Methylpyrazolo[1,5-a]pyrimidin-5-ol (CAS 1566363-62-9)
- Ethyl 5-(3-(trifluoromethyl)phenyl)-1,2,4-oxadiazole-3-carboxylate (CAS 163720-43-2)
- Methyl 2-(1-hydroxyethyl)-5-methyloxazole-4-carboxylate (CAS 61183-21-9)
- Neuropeptide Y (2-36) (human, rat) trifluoroacetate salt (CAS 123139-39-9)
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