4-Chloro-2-methylthiophene CAS 91375-70-1
| CAS No. | 91375-70-1 |
| Molecular Formula | C5H5ClS |
| Molecular Weight | 132.61 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.
CATO supplies 4-Chloro-2-methylthiophene (CAS 91375-70-1), a certified reference material (molecular formula C5H5ClS, MW 132.61 g/mol) for analytical method development and quality control.
Owing to sulfur-containing functionality, chlorine substitution, 4-Chloro-2-methylthiophene is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 132.61 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 | C5H5ClS |
| Molecular Weight | 132.61 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1983 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 2-Chloro-3-methylthiophene (CAS 14345-97-2)
- 2-Chloro-5-methylthiophene (CAS 17249-82-0)
- 3-Chloro-2-methylthiophene (CAS 17249-83-1)
- 2-Chloro-4-methylthiophene (CAS 91505-25-8)
- 5-chloro-5-methylhex-1-ene (CAS 116911-84-3)
- 6-Chloro-5-methylhex-1-ene (CAS 1342612-45-6)
- 1-Chloro-1-methylcyclohexane (CAS 931-78-2)
- 1-Chloro-3-ethylpent-2-ene (CAS 761-20-6)
Recommended Standards
- 3-(Chloromethyl)thiophene (CAS 2746-23-8)
- 2-Chloromethylthiophene (CAS 765-50-4)
- 1-(Chloromethyl)-1-propylcyclopropane (CAS 1481389-10-9)
- (2-Chloroethyl)cyclopentane (CAS 84226-36-8)
- Methyl 2-(chlorosulfonyl)-4-iodobenzoate (CAS 144550-78-7)
- [1,2,3]Triazolo[1,5-a]quinoline (CAS 235-21-2)
- 6,8-Dichloro-3-(2,6-dimethylphenyl)-2-(((3-(trifluoromethyl)phenyl)thio)methyl)quinazolin-4(3H)-one (CAS 338957-48-5)
- 2,4,5-Trifluoro-3-methoxybenzaldehyde (CAS 1260679-12-6)
- (3-Bromobicyclo[1.1.1]Pentan-1-yl)methyl acetate (CAS 137741-17-4)
- 2-methoxy-4-azatricyclo[4.2.1.0³⁷]nonane (CAS 1378849-55-8)
- 2-Cyclopropyl-5-(propan-2-ylidene)-1H-imidazol-4(5H)-one (CAS 161456-49-1)
- N-(2-Chlorophenyl)-1-(2-fluorophenyl)-5-methyl-1H-1,2,3-triazole-4-carboxamide (CAS 890645-66-6)
- 1-(3-Bromo-4-methoxy-benzyl)-piperidine (CAS 886-47-5)
- Tau Peptide (307-321) trifluoroacetate salt (CAS 330456-50-3)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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