2,4-dichloro-7-methylthieno[3,2-d]pyrimidine CAS 35265-83-9
| CAS No. | 35265-83-9 |
| Molecular Formula | C7H12Cl2N2S |
| Molecular Weight | 227.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 2,4-dichloro-7-methylthieno[3,2-d]pyrimidine.
2,4-dichloro-7-methylthieno[3,2-d]pyrimidine (CAS 35265-83-9), molecular formula C7H12Cl2N2S and molecular weight 227.15 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrile group, sulfur-containing functionality, chlorine substitution, 2,4-dichloro-7-methylthieno[3,2-d]pyrimidine is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 227.15 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C7H12Cl2N2S |
| Molecular Weight | 227.15 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.) | 1967 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related dichloro Standards
- 2,4-dichloro-6-methylthieno[2,3-d]pyrimidine (CAS 76872-23-6)
- 3-(Dichloro(methyl)silyl)propyl acrylate (CAS 71550-63-5)
- 1,4-dichloro-6-fluorophthalazine (CAS 1095639-59-0)
- 2,7-dichloro-6-fluoroquinazoline (CAS 1512749-33-5)
- 4,8-dichloro-6-fluoro-quinazoline (CAS 1566729-83-6)
- 3,8-dichloro-5-fluoro-1,7-naphthyridine (CAS 1600511-82-7)
- 1-Benzyl-4,5-dichloro-1H-imidazole (CAS 107108-24-7)
- 2,8-Dichloro-6-methylquinolin-5-amine (CAS 1071675-48-3)
Recommended Standards
- 2-Octyl-1,3,6,2-dioxazaborocane (CAS 96508-56-4)
- (R)-3,3-Dimethyl-1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)butan-1-amine (CAS 1259365-02-0)
- 3,3,4,4,4-Pentafluorobutane-1-sulfonamide (CAS 29765-92-2)
- (R)-3,3-Dimethyl-1-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)butan-1-amine hydrochloride (CAS 1259299-99-4)
- 2-Chloro-4-(chloromethyl)-1-methoxybenzene (CAS 13719-57-8)
- rel-(8R,9aS)-8-Hydroxyoctahydro-4H-quinolizin-4-one (CAS 2799639-10-2)
- 2-(6-Bromo-2-oxoindolin-3-yl)acetic acid (CAS 1368446-59-6)
- Clarithromycin-N-methyl-d3 (CAS CATO-CCAD302748)
- (R)-N-((R)-(3,5-Di(naphthalen-2-yl)phenyl)(2-(diphenylphosphanyl)-5-(trifluoromethyl)phenyl)methyl)-N,2-dimethylpropane-2-sulfinamide (CAS 2835567-44-5)
- N-(4-Chloro-2-methoxy-5-methylphenyl)-2-((5-(4-chlorophenyl)-4-(p-tolyl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 476486-02-9)
- Fmoc-β-Ala-D-Ala-OH (CAS 2171147-38-7)
- [(3aR,4R,7aR)-2,2-dimethyl-4,7a-dihydro-3aH-[1,3]dioxolo[4,5-c]pyran-4-yl]methoxy-triisopropyl-silane (CAS 213332-12-8)
- 6-Bromo-2-chloro-3-methoxybenzoic acid (CAS 1055968-54-1)
- Neuropeptide Y (1-24) amide (human, rat) (CAS 131448-51-6)
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