1,3-Dimethyl-5-pyrazolone CAS 2749-59-9
| CAS No. | 2749-59-9 |
| Molecular Formula | C5H8N2O |
| Molecular Weight | 112.13 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 1,3-Dimethyl-5-pyrazolone.
1,3-Dimethyl-5-pyrazolone (CAS 2749-59-9) is a high-purity analytical reference standard with the molecular formula C5H8N2O and a molecular weight of 112.13 g/mol.
The molecular framework of 1,3-Dimethyl-5-pyrazolone (C5H8N2O) is characterized by an amide group, a hydroxyl group, an ether linkage. 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 1,3-Dimethyl-5-pyrazolone meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C5H8N2O |
| Molecular Weight | 112.13 g/mol |
| Purity | >95% |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Related Dimethyl Standards
- 4,5-dimethyl-2,3-dihydro-1H-imidazol-2-one (CAS 1072-89-5)
- 2,5-Dimethyl-3(2H)-furanone (CAS 14400-67-0)
- 3,4-Dimethyl-1H-pyrazol-5-ol (CAS 145092-15-5)
- Dimethyl-1h-1,2,3-triazol-4-amine (CAS 1461713-95-0)
- 1,4-Dimethyl-1H-1,2,3-triazol-5-amine (CAS 1536564-18-7)
- 3,4-Dimethyl-2(5H)-furanone (CAS 1575-46-8)
- 1,3-Dimethyl-1H-imidazol-2(3H)-one (CAS 39799-78-5)
- 1,4-Dimethyl-1H-pyrazol-5(4H)-one (CAS 3310-38-1)
Recommended Standards
- Ethyl N-cyanoethanimidate (CAS 1558-82-3)
- 5-ethyl-2,5-dihydrofuran-2-one (CAS 2407-43-4)
- 5-Methyl-2-furanmethanol (CAS 3857-25-8)
- (±)-1-(2-Furyl)ethanol (CAS 4208-64-4)
- N-(2-chloro-5-(trifluoromethyl)phenyl)-2-((4-chlorobenzyl)amino)acetamide (CAS 297150-43-7)
- alpha-Phenyl-alpha-(2-propyn-1-yloxy)benzeneacetic Acid (CAS 2766-01-0)
- 1H-indazole, 3,4-dibromo-6-iodo- (CAS 887568-47-0)
- 1-Acetyl-4-methyl-1H-imidazol-2-yl acetate (CAS 849454-49-5)
- TERT-BUTYL 4-BROMO-3,5-DIMETHOXYBENZOATE (CAS 167830-43-5)
- Nintedanib Impurity 58 (CAS 1160293-24-2)
- 3-(3,4-Dimethoxyphenyl)-5-((2-methylbenzyl)thio)-4H-1,2,4-triazol-4-amine (CAS 578734-96-0)
- 3-(Tert-butoxymethyl)pyrrolidine (CAS 1247733-27-2)
- Enalapril Impurity 14 (Bis(2-chloroethyl)-Butanedioate) (CAS 925-17-7)
- D-[Asp]9-Semaglutide (CAS CATO-CPTD788631)
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