5,6,7,8-Tetrahydropyrido[4,3-d]pyrimidin-4(3H)-one CAS 756437-41-9
| CAS No. | 756437-41-9 |
| Molecular Formula | C7H9N3O |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5,6,7,8-Tetrahydropyrido[4,3-d]pyrimidin-4(3H)-one (C7H9N3OHCl) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies 5,6,7,8-Tetrahydropyrido[4,3-d]pyrimidin-4(3H)-one (CAS 756437-41-9), a certified reference material (molecular formula C7H9N3OHCl, MW 187.63 g/mol) for analytical method development and quality control.
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 | C7H9N3O HCl |
| Molecular Weight | 187.63 g/mol |
| Appearance | Off-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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Tetrahydropyrido Standards
- 5,6,7,8-Tetrahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidine (CAS 1029720-37-3)
- 7-Benzyl-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidin-4(4aH)-one (CAS 1053656-41-9)
- 1058704-79-2 4-Ethyl-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine 8261AC C9H13N3 (CAS 1058704-79-2)
- 6-Benzyl-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4(3H)-one (CAS 109229-22-3)
- 7-Methyl-5,6,7,8-tetrahydropyrido[4,3-e][1,2,4]triazin-3-amine (CAS 1152506-03-0)
- 2-Methyl-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine hydrochloride (CAS 1159812-70-0)
- 2-Methyl-5,6,7,8-tetrahydropyrido[3,4-d]pyrimidine (CAS 1159882-42-4)
- 5,6,7,8-Tetrahydropyrido[4,3-d]pyrimidine-2,4(1H,3H)-dione hydrochloride (CAS 1170023-46-7)
Recommended Standards
- (S)-5-Guanidino-2-tetradecanamidopentanoic acid (CAS 60372-80-7)
- (4-Fluorophenyl)(indolin-1-yl)methanone (CAS 90172-60-4)
- 3-(4-Biphenylyl)-2-cyanopropionic Acid (CAS 2044707-23-3)
- 6-Bromo-4H-1,3-benzodioxine-8-carbaldehyde (CAS 147723-32-8)
- (S)-(-)-1-(4-Fluorophenyl)ethyl isocyanate (CAS 745783-74-8)
- 2-Hydroxy-4-(3-pyridyl)pyrimidine (CAS 897031-20-8)
- Azithromycin Impurity 27 (CAS CATO-C4X-100327)
- 4-Bromo-7-nitrobenzo[c][1,2,5]thiadiazole (CAS 26460-78-6)
- Dexrazoxane Impurity 13 (CAS CATO-C4X-202013)
- Semaglutide impurity 31 (CAS CATO-C4X-222631)
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