2-Chloro-1-(3-methyl-2-thienyl)-ethanone CAS 556110-52-2
| CAS No. | 556110-52-2 |
| Molecular Formula | C7H7ClOS |
| Molecular Weight | 174.65 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.
2-Chloro-1-(3-methyl-2-thienyl)-ethanone (CAS 556110-52-2), molecular formula C7H7ClOS and molecular weight 174.65 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H7ClOS, 2-Chloro-1-(3-methyl-2-thienyl)-ethanone contains sulfur-containing functionality, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 174.65 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 2-Chloro-1-(3-methyl-2-thienyl)-ethanone 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 | C7H7ClOS |
| Molecular Weight | 174.65 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl-containing |
| Sulfur Atoms | 1 |
Related Chloro Standards
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- 4-Chloro-2-(Sulfanylmethyl)phenol (CAS 118143-41-2)
- 1-(4-Chloro-5-methylthiophen-2-yl)ethan-1-one (CAS 123418-42-8)
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Recommended Standards
- 2-Acetyl-5-chloro-4-methylthiophene (CAS 91505-26-9)
- 2-Chloro-1-(4-methyl-2-thienyl)-ethanone (CAS 556110-51-1)
- 2,5-Dimethylthiophene-3-carbonyl chloride (CAS 57248-13-2)
- 2-Chloro-1-(5-methyl-thiophen-2-yl)-ethanone (CAS 31772-42-6)
- Methyl 4-Acetamido-5-chloro-2-methoxy-3-nitrobenzoate (CAS 126463-85-2)
- tert-Butyl 2-ethoxypyrrolidine-1-carboxylate (CAS 106412-40-2)
- 5-(Chloromethyl)-2-(difluoromethyl)-3-methylpyridine (CAS 1806802-48-1)
- Cyclopropyl[3-(trifluoromethyl)phenyl]methanamine (CAS 59382-27-3)
- 3-(Dimethylamino)-5-(methylamino)phenol (CAS 1243368-59-3)
- 5-Fluoroquinazoline (CAS 16499-43-7)
- Oxandrolone (CAS 53-39-4)
- Ethyl 3-chlorobenzo[b]thiophene-2-carboxylate (CAS 21211-08-5)
- Methyl 5,6,7,8-Tetrahydropyrido[4,3-b]pyrazine-7-carboxylate Hydrochloride (CAS 264624-28-4)
- Tau Peptide (275-305) (Repeat 2 Domain) trifluoroacetate salt (CAS 330456-25-2)
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