7-Chloro-1-benzothiophene-2-carboxylic acid CAS 90407-16-2
| CAS No. | 90407-16-2 |
| Molecular Formula | C9H5ClO2S |
| Molecular Weight | 212.65 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
7-Chloro-1-benzothiophene-2-carboxylic acid (CAS 90407-16-2), molecular formula C9H5ClO2S and molecular weight 212.65 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 7-Chloro-1-benzothiophene-2-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 212.65 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 Formula | C9H5ClO2S |
| Molecular Weight | 212.65 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
- (2-Chloro-6-fluorophenyl)(dimethylamino)acetonitrile (CAS 1017451-92-1)
- 1-[2-(2-chloro-6-fluorophenyl)cyclopropyl]ethan-1-one (CAS 1038300-47-8)
- 4-(3-Chloro-2-fluorophenyl)-2-methylbut-3-yn-2-ol (CAS 1187385-72-3)
- 1-(3-Chloro-4-fluorophenyl)-2-cyclopropylethan-1-one (CAS 1485701-53-8)
- 5-Chloro-benzo[b]thiophene-3-carboxylic acid (CAS 16361-24-3)
- 2-(5-Chloro-7-fluoro-1H-indol-3-yl)ethan-1-amine (CAS 1780733-47-2)
- (2-Chloro-4-fluorophenyl)(cyclobutyl)methanone (CAS 898791-03-2)
- (3-Chloro-4-fluorophenyl)(cyclobutyl)methanone (CAS 898790-88-0)
Recommended Standards
- 6-Chlorobenzo[b]thiophene-2-carboxylic acid (CAS 26018-73-5)
- Di-tert-butyl Phosphorochloridite (CAS 78543-77-8)
- 5-(Furan-2-yl)thiophene-2-carbonyl chloride (CAS 868755-63-9)
- 898791-06-5 (3-Chloro-5-fluorophenyl)(cyclobutyl)methanone DTXSID40642544 (CAS 898791-06-5)
- 5-Amino-1-(cyclopentylmethyl)pyrimidine-2,4(1h,3h)-dione (CAS 1339792-78-7)
- 2'-Deoxyadenosine-5'-diphosphate trisodium salt (CAS 402491-35-4)
- 1-[(4-Ethylphenyl)sulfonyl]piperidine-4-carboxylic acid (CAS 345990-55-8)
- 2-(6-(3-Ethyl-1,2,4-oxadiazol-5-yl)-3-oxo-[1,2,4]triazolo[4,3-a]pyridin-2(3H)-yl)acetic acid (CAS 1707603-36-8)
- Cholic Acid Impurity 2 (CAS CATO-C4X-11602)
- 4-Benzylisoquinolin-1-amine (CAS 42398-69-6)
- 1-[(2,5-dimethylfuran-3-yl)carbonyl]piperazine (CAS 953743-83-4)
- Ethyl 2-((2R,3S)-3-((tert-butoxycarbonyl)amino)piperidin-2-yl)acetate (CAS 150618-13-6)
- 2-(2,5-Dichlorobenzamido)-6-isopropyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxamide hydrochloride (CAS 1219189-56-6)
- Insulin aspart (CAS 116094-23-6)
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