2-chloro-7H-pyrimido[5,4-d]pyrimidin-8-one CAS 189747-31-7
| CAS No. | 189747-31-7 |
| Molecular Formula | C6H11ClN4O |
| Molecular Weight | 190.63 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-chloro-7H-pyrimido[5,4-d]pyrimidin-8-one.
2-chloro-7H-pyrimido[5,4-d]pyrimidin-8-one (CAS 189747-31-7), molecular formula C6H11ClN4O and molecular weight 190.63 g/mol, is a CATO reference standard with documented purity and traceability.
2-chloro-7H-pyrimido[5,4-d]pyrimidin-8-one (C6H11ClN4O) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C6H11ClN4O |
| Molecular Weight | 190.63 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2011 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
Related chloro Standards
- 2-Chloro-3,3'-bipyridine (CAS 101001-94-9)
- 6-Chloro-1-naphthaldehyde (CAS 116632-02-1)
- 4-Chloro-7-methyl-1H-indole-6-carbonitrile (CAS 1167056-04-3)
- 2-Chloro-3,4'-bipyridine (CAS 1187968-06-4)
- 5-chloro-1-methyl-1H,6H,7H-pyrazolo[4,3-d]pyrimidin-7-one (CAS 1211533-31-1)
- 4-Chloro-2,4'-bipyridine (CAS 1214335-54-2)
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- 2-Chloro-4-phenylpyrimidine (CAS 13036-50-5)
Recommended Standards
- 2'-Chloro-3,4'-bipyridine (CAS 171020-15-8)
- 2-(4-Chloro-1h-indol-3-yl)acetonitrile (CAS 2447-15-6)
- 5-Chloro-2,2'-bipyridine (CAS 162612-08-0)
- 2-(5-Chloro-1H-indol-3-yl)acetonitrile (CAS 81630-83-3)
- (E)-(3-(3-fluorophenyl)acryloyl)glycine (CAS 853355-85-8)
- Proquinazid Metabolite IN-MM991 (CAS 20297-19-2)
- 4-Fluoro-1H-pyrrolo[2,3-c]pyridine-7-carbonitrile (CAS 446284-50-0)
- 7-Nitro-3,4-dihydroisoquinolin-1(2H)-one (CAS 22245-96-1)
- N,1-Dimethylisoquinolin-5-amine (CAS 53760-81-9)
- 8-Methoxy-1-naphthaldehyde (CAS 35689-27-1)
- 1-(4-Chloro-2-fluorophenyl)ethanol (CAS 933673-55-3)
- 2-(5-Chloro-2-fluoro-4-nitrophenyl)-3,4-dihydronaphthalen-1(2H)-one (CAS 1451449-38-9)
- (S)-3-Amino-3-(2-chloro-4-(trifluoromethyl)phenyl)propan-1-ol (CAS 1336723-04-6)
- (Ser(PO3H2)202,Thr(PO3H2)205)-Tau Peptide (194-213) trifluoroacetate salt (CAS 2022956-55-2)
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