Diethyl 5-oxo-4,5-dihydro-1H-pyrazole-1,3-dicarboxylate CAS 90438-40-7
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 90438-40-7 |
| Molecular Formula | C9H12N2O5 |
| Molecular Weight | 228.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Diethyl 5-oxo-4,5-dihydro-1H-pyrazole-1,3-dicarboxylate (CAS 90438-40-7) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C9H12N2O5. Molecular weight: 228.20 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C9H12N2O5 |
| Molecular Weight | 228.20 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, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1982 |
| Nitrogen Atoms | 2 |
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Recommended Standards
- D715-2441 (CAS 54245-10-2)
- Dimethyl 2,5-dioxocyclohexane-1,4-dicarboxylate (CAS 6289-46-9)
- 7-Hydroxy-3-(1H-imidazol-4-yl)-4H-chromen-4-one (CAS 67832-78-4)
- 1-(2,6-Dimethylphenoxy)-3,3-dimethylbutan-2-amine (CAS 953881-15-7)
- 7-Hydroxyhexadecanoic acid (CAS 16899-02-8)
- 3-(1-(Sec-butyl)-1H-pyrazol-4-yl)propan-1-amine (CAS 1339671-81-6)
- Tos-aminoxy-Boc-PEG4-Tos (CAS 1817735-42-4)
- 6-bromopyrrolo[2,1-f][1,2,4]triazin-4-amine (CAS 937047-06-8)
- 1-phenylpiperazin-2-one (CAS 90917-86-5)
- Semaglutide impurity 66 (CAS CATO-C4X-222666)
Why CATO?
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