2,4-Dichloro-5,8-dihydro-6H-pyrano[3,4-d]pyrimidine CAS 1269461-25-7
| CAS No. | 1269461-25-7 |
| Molecular Formula | C7H6Cl2N2O |
| Molecular Weight | 205.04 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.
CATO supplies 2,4-Dichloro-5,8-dihydro-6H-pyrano[3,4-d]pyrimidine (CAS 1269461-25-7), a certified reference material (molecular formula C7H6Cl2N2O, MW 205.04 g/mol) for analytical method development and quality control.
Owing to an amide group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 2,4-Dichloro-5,8-dihydro-6H-pyrano[3,4-d]pyrimidine is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 205.04 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C7H6Cl2N2O |
| Molecular Weight | 205.04 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| 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.) | 1990 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Dichloro Standards
- 3,5-Dichloro-2-methyl-benzoic acid (CAS 101567-48-0)
- 3,6-Dichloro-N-methyl-2-pyridinecarboxamide (CAS 1021077-12-2)
- 3’,4’-Dichloro-2-hydroxyacetophenone (CAS 113337-38-5)
- 2,5-Dichloro-3-methylbenzoic acid (CAS 1160573-37-4)
- 2,3-Dichloro-4-methylbenzoic acid (CAS 1254073-62-5)
- 2,4-Dichloro-7,8-dihydro-6H-pyrano[3,2-d]pyrimidine (CAS 1260088-59-2)
- 2,4-Dichloro-6,7-dihydro-5H-pyrano[2,3-d]pyrimidine (CAS 1260088-95-6)
- 3,4-Dichloro-5-cyclopropoxypyridazine (CAS 1346698-10-9)
Recommended Standards
- (6-(Thiophen-3-yl)pyridin-3-yl)boronic acid (CAS 1264513-41-8)
- 1-(2,5-Dichlorophenyl)urea (CAS 13142-55-7)
- 1-(3,5-Dichlorophenyl)urea (CAS 13142-57-9)
- 3-(1,3-Thiazol-2-yl)phenylboronic acid (CAS 1316856-96-8)
- 1-Bromo-3-fluoroisoquinoline (CAS 1076-36-4)
- N-(4-Chloro-2-methoxyphenyl)-2-cyanoacetamide (CAS 1072069-59-0)
- 2,4-Diisopropylthiophen-3-amine hydrochloride (CAS 135137-07-4)
- (S)-5-Aminocyclohexa-1,3-dienecarboxylic acid (CAS 59556-29-5)
- 3-Chloro-6-hydroxy-4-(trifluoromethyl)pyridine (CAS 109919-31-5)
- 5-(Ethoxycarbonyl)benzo[c][1,2,5]oxadiazole 1-oxide (CAS 17348-71-9)
- 2-[3-(4-Chlorophenyl)-1,2,4-oxadiazol-5-yl]-N-(4-methoxyphenyl)acetamide (CAS 478042-37-4)
- (3,5-Bis(trifluoromethyl)phenyl)diphenylphosphine oxide (CAS 299176-62-8)
- Hex-4-yn-2-amine (CAS 1249315-57-8)
- Antistasin-Related Peptide (CAS 161561-46-2)
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