4,6-Dihydropyrimido[4,5-c]pyridazin-5(1H)-one CAS 94295-32-6
| CAS No. | 94295-32-6 |
| Molecular Formula | C6H6N4O |
| Molecular Weight | 150.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4,6-Dihydropyrimido[4,5-c]pyridazin-5(1H)-one (CAS 94295-32-6), molecular formula C6H6N4O and molecular weight 150.14 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 4,6-Dihydropyrimido[4,5-c]pyridazin-5(1H)-one (C6H6N4O) is characterized by an amide group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C6H6N4O |
| Molecular Weight | 150.14 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | 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.) | 1983 |
| Nitrogen Atoms | 4 |
Related Dihydropyrimido Standards
- 5,6-Dihydropyrimido[4,5-d]pyrimidin-2-ol (CAS 120267-08-5)
- 1,2-Dihydropyrimido[4,5-d]pyrimidin-4-amine (CAS 88526-65-2)
- 3-Methyl-1,2-dihydropyrimido[5,4-e][1,2,4]triazine (CAS 19801-82-2)
- 5,6-Dihydropyrimido[4,5-d]pyrimidin-2-amine (CAS 7702-65-0)
- 5-Methyl-1,2-dihydropyrimido[5,4-e][1,2,4]triazine (CAS 25624-79-7)
- 7-Methyl-1,2-dihydropyrimido[5,4-e][1,2,4]triazine (CAS 19801-87-7)
- 5,6-Dihydropyrimido[5,4-e][1,2,4]triazin-5-ol (CAS 205926-63-2)
- 7-Methyl-1,4-dihydropyrimido[4,5-d]pyrimidine (CAS 31375-19-6)
Recommended Standards
- 4-(1H-Imidazol-2-yl)-1H-1,2,3-triazol-5-amine (CAS 719261-16-2)
- 4,7-Dihydro-3H-imidazo[4,5-d][1,3]diazepin-8-one (CAS 72079-77-7)
- 3-Methyl-7H,8H-[1,2,4]triazolo[4,3-a]pyrazin-8-one (CAS 68774-82-3)
- 4-Amino-1h,2h,3h-imidazo[4,5-c]pyridin-2-one (CAS 71703-03-2)
- 7’-fluoro-1’,2’-dihydrospiro[cyclopentane-1,3’-indole] (CAS 1368756-19-7)
- 2-(4-Isopropylphenyl)-2H-benzo[d][1,2,3]triazol-5-amine (CAS 637302-70-6)
- Methyl 3-(4-fluorobenzamido)-4-methylthiophene-2-carboxylate (CAS 677706-82-0)
- 6-Chloro-5-fluoro-2-methylpyrimidin-4-amine (CAS 943006-45-9)
- Methyl 2-acetyl-6-bromoisonicotinate (CAS 1393530-08-9)
- 3-amino-1,1-difluoropentan-2-ol hydrochloride (CAS 1864063-11-5)
- 2-Fluoro-4-(4-methylpiperazinomethyl) benzophenone (CAS 898783-89-6)
- 4-((2-Chloro-3H-purin-6-yl)amino)butanoic acid (CAS 919740-31-1)
- RTI 32 (CAS 130342-81-3)
- Semaglutide impurity 194 (CAS CATO-C4X-2226194)
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