4,5-Dichloro-2-methylthieno[2,3-d]pyrimidine CAS 137287-40-2
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 137287-40-2 |
| Molecular Formula | C7H4Cl2N2S |
| Molecular Weight | 219.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,5-Dichloro-2-methylthieno[2,3-d]pyrimidine (CAS 137287-40-2) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C7H4Cl2N2S. Molecular weight: 219.09 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C7H4Cl2N2S |
| Molecular Weight | 219.09 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 | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Dichloro Standards
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- 4,7-Dichloro-2-methylthieno[3,2-d]pyrimidine (CAS 1823921-18-1)
- 4,7-Dichloro-1,3-benzothiazol-2-amine (CAS 1849-70-3)
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- 2,3-Dichloro-4-thiocyanatoaniline (CAS 7494-03-3)
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Recommended Standards
- 3-chloro-1-methyl-1H-pyrazole-4-sulfonyl chloride (CAS 1369123-50-1)
- (4-(Azepan-1-yl)phenyl)boronic acid (CAS 1279027-58-5)
- 4-Chloro-2-(chloromethyl)thieno[3,2-d]pyrimidine (CAS 147005-92-3)
- 5-Oxo-5-(m-tolyl)pentanoic acid (CAS 36978-51-5)
- 5,6-Dimethoxybenzo[b]thiophene-2-carbohydrazide (CAS 1263215-28-6)
- Fmoc-Thr(tBu)-Phe-OH (CAS 1962160-86-6)
- Pisolithin B (CAS 13244-78-5)
- 1,3-Bis(benzo[d][1,3]dioxol-5-yl)prop-2-en-1-one (CAS 76530-89-7)
- N-[3,5-Bis(trifluoromethyl)phenyl]-N'-[(1S,2S)-2-[(11bR)-3,5-dihydro-4H-dinaphth[2,1-c:1',2'-e]azepin-4-yl]-1,2-diphenylethyl]urea (CAS 1428959-93-6)
- D-Thr7-Tirzepatide (CAS CATO-CPTD788924)
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