4-chloro-5-methylthieno[2,3-d]pyrimidine CAS 43088-67-1
| CAS No. | 43088-67-1 |
| Molecular Formula | C7H13ClN2S |
| Molecular Weight | 192.71 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 192.71 g/mol gives 4-chloro-5-methylthieno[2,3-d]pyrimidine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 4-chloro-5-methylthieno[2,3-d]pyrimidine (CAS 43088-67-1), a certified reference material (molecular formula C7H13ClN2S, MW 192.71 g/mol) for analytical method development and quality control.
Structurally, 4-chloro-5-methylthieno[2,3-d]pyrimidine (C7H13ClN2S) contains a nitrile group, sulfur-containing functionality, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 192.71 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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), 4-chloro-5-methylthieno[2,3-d]pyrimidine 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 | C7H13ClN2S |
| Molecular Weight | 192.71 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1969 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related chloro Standards
- 4-chloro-6-methylthieno[3,2-d]pyrimidine (CAS 108134-22-1)
- 2-chloro-6-methylthieno[2,3-d]pyrimidine (CAS 1225875-20-6)
- 4-chloro-7-methylthieno[3,2-d]pyrimidine (CAS 175137-21-0)
- 2-chloro-1,3-benzothiazol-7-amine (CAS 1782641-10-4)
- 2-chloro-6-methyl-thieno[3,2-d]pyrimidine (CAS 2033057-21-3)
- 4-chloro-2-methylthieno[2,3-d]pyrimidine (CAS 56843-79-9)
- 1-Chloro-6-methyl-1,2-dihydro-thieno[3,2-d]pyrimidine 319442-16-5 4-chloro-2-methylthieno[3,2-d]pyrimidine A5755 (CAS 319442-16-5)
- 1-(3-Chloro-2-methylpropoxy)-3,3-dimethylbutane (CAS 1477830-43-5)
Recommended Standards
- 19952-47-7 2-Benzothiazolamine, 4-chloro- Benzothiazole, 2-amino-4-chloro- 4-Chlorobenzothiazol-2-ylamine 4-27-00-04859 (Beilstein Handbook Reference) 2-Amino-4-chlorobenzothiazole BRN 0136784 EINECS 243-439-5 (CAS 19952-47-7)
- 2U337T5UFG 95-24-9 6-Chloro-2-benzothiazolamine 2-Benzothiazolamine, 6-chloro- Benzothiazole, 2-amino-6-chloro- 6-Chlorobenzothiazol-2-ylamine 4-27-00-04862 (Beilstein Handbook Reference) 2-Amino-6-chlorobenzothiazole BRN 0127752 EINECS 202-402-3 UNII-2U337T5UFG (CAS 95-24-9)
- 1-Butoxy-6-chlorohexane (CAS 1002-76-2)
- 6-chlorothieno[2,3-b]pyridin-2-amine (CAS 1638771-87-5)
- (5-Amino-1-(3-chlorophenyl)-1H-pyrazol-4-yl)(4-chlorophenyl)methanone (CAS 618091-50-2)
- 4,4-Difluoro-1-hydroxycyclohexane-1-carboxylic acid (CAS 1075221-15-6)
- 1-(2-Fluorophenyl)-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazine (CAS 897615-91-7)
- Tofacitinib Related Compound 99 HCl (CAS 1629858-78-1 (free base))
- Etoricoxib Impurity 82 (CAS 107825-28-5)
- Methyl2-methyl-8-oxo-3-phenyl-5,6,7,8-tetrahydro-1-oxa-7a-azaindacene-4-carboxylate (CAS 866393-57-9)
- 2-(2-Fluoro-phenyl)-2-methyl-propionic acid (CAS 870849-49-3)
- 2-[2-(4-Bromophenoxy)ethyl]piperidinehydrochloride (CAS 1220032-05-2)
- 2-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole-5-carbonitrile (CAS 1256359-11-1)
- Acetyl Tetrapeptide- 15 (CAS 928007-64-1)
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