4-Hydroxy-1,5-dimethyl-1H-pyrazol-3(2H)-one CAS 408340-18-1
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 408340-18-1 |
| Molecular Formula | C5H8N2O2 |
| Molecular Weight | 128.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Hydroxy-1,5-dimethyl-1H-pyrazol-3(2H)-one (CAS 408340-18-1) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C5H8N2O2. Molecular weight: 128.13 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C5H8N2O2 |
| Molecular Weight | 128.13 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
Related Hydroxy Standards
- Methyl 2-hydroxy-2-methylbut-3-ynoate (CAS 1082737-09-4)
- 4-Hydroxy-1,3-dimethyl-1H-pyrazol-5(4H)-one (CAS 114214-88-9)
- 4-Hydroxy-6-methyl-3,4-dihydro-2H-pyran-2-one (CAS 1215661-50-9)
- 1-hydroxy-3-methylene-cyclobutanecarboxylic acid (CAS 156517-94-1)
- 4-Ethyl-5-hydroxy-2,5-dihydrofuran-2-one (CAS 1575-49-1)
- 5-Hydroxy-3,4-dimethylfuran-2(5H)-one (CAS 1575-54-8)
- (R)-4-hydroxy-2-(hydroxymethyl)cyclopent-2-en-1-one (CAS 76420-07-0)
- (S)-4-hydroxy-2-(hydroxymethyl)cyclopent-2-en-1-one (CAS 2271090-84-5)
Recommended Standards
- 4-Ethylpyrazolidine-3,5-dione (CAS 23876-80-4)
- 4-Hydroxy-1-methyl-3,4-dihydropyrimidin-2(1H)-one (CAS 205926-76-7)
- 4-Amino-6-methyl-5,6-dihydro-1,2,4-triazin-3(4H)-one (CAS 762217-20-9)
- (±)-1-Hexadecanoyl-3-chloropropane-d5-diol (CAS 1189718-15-7)
- 4-(Ethylsulfonyl)-2-methylenecyclopentanecarboxylic acid (CAS 1707567-98-3)
- 5-Amino-4-(1H-1,3-benzodiazol-2-yl)-1-(4-methoxyphenyl)-2,3-dihydro-1H-pyrrol-3-one (CAS 459137-96-3)
- Bis(2,2,6,6-tetramethyl-3,5-heptanedionato)magnesium (CAS 21361-35-3)
- 1-(tert-Butyl)-2-cyclopropoxy-4-methylbenzene (CAS 1243451-57-1)
- Diosmin EP Impurity C (CAS 552-57-8)
- Insulin Glargine (CAS 160337-95-1)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 13829788188 / jacky.chen@cato-chem.com