2,4-Dichloro-6,7-dihydrothieno[3,2-d]pyrimidine CAS 74901-69-2
| CAS No. | 74901-69-2 |
| Molecular Formula | C6H4Cl2N2S |
| Molecular Weight | 207.08 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-6,7-dihydrothieno[3,2-d]pyrimidine.
CATO supplies 2,4-Dichloro-6,7-dihydrothieno[3,2-d]pyrimidine (CAS 74901-69-2), a certified reference material (molecular formula C6H4Cl2N2S, MW 207.08 g/mol) for analytical method development and quality control.
Owing to a nitrile group, sulfur-containing functionality, chlorine substitution, an aromatic ring system, 2,4-Dichloro-6,7-dihydrothieno[3,2-d]pyrimidine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 207.08 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C6H4Cl2N2S |
| Molecular Weight | 207.08 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Dichloro Standards
- 1,3-Dichloro-5,6-dihydro-4H-cyclopenta[c]thiophen-4-one (CAS 7687-79-8)
- 2,4-Dichloro-5,6-dihydrothieno[2,3-d]pyrimidine (CAS 74901-61-4)
- 2,4-Dichloro-5H,7H-thieno[3,4-d]pyrimidine (CAS 74901-71-6)
- 2,4-Dichloro-6-isopropoxypyrimidine (CAS 1026787-89-2)
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- 3,5-Dichloro-1-isopropylpyrazin-2(1H)-one (CAS 1269534-00-0)
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Recommended Standards
- 2-Methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrole (CAS 2800894-73-7)
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- 2,2,2-Trifluoro-N-(2,2,2-trifluoro-1-iminoethyl)acetimidamide (CAS 675-05-8)
- 3-[(Diethylamino)methyl]phenylboronic Acid (CAS 944483-39-0)
- (S)-2-amino-1-(4-((isopropyl(methyl)amino)methyl)piperidin-1-yl)propan-1-one (CAS 1292746-49-6)
- 2-Ethoxy-4-(3-(tetrahydrofuran-2-yl)-1H-1,2,4-triazol-5-yl)phenol (CAS 1416343-45-7)
- 2-Bromo-6-chloro-4-(trifluoromethyl)benzoic acid (CAS 1956322-96-5)
- Lasmiditan Impurity 5 (CAS 68947-43-3)
- 2-Amino-2-(3-fluorobicyclo[1.1.1]Pentan-1-yl)acetic acid hydrochloride (CAS 2103622-40-6)
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