3-Methyl-2-pyrazolin-5-one
- Product Name3-Methyl-2-pyrazolin-5-one
- CAS108-26-9
- CBNumberCB4703239
- MFC4H6N2O
- MW98.1
- EINECS203-565-3
- MDL NumberMFCD00020699
- MOL File108-26-9.mol
- MSDS FileSDS
Chemical Properties
| Melting point | 220-224 °C |
| Boiling point | 183.6°C (rough estimate) |
| Density | 1.1890 (rough estimate) |
| refractive index | 1.4327 (estimate) |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | Slightly soluble in ethanol. |
| pka | 13.10±0.40(Predicted) |
| form | powder to crystal |
| color | White to Light yellow |
| CAS DataBase Reference | 108-26-9(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | P378M0497D |
| NIST Chemistry Reference | 3H-pyrazol-3-one, 2,4-dihydro-5-methyl-(108-26-9) |
| EPA Substance Registry System | 3H-Pyrazol-3-one, 2,4-dihydro-5-methyl- (108-26-9) |
Safety
| Symbol(GHS) |
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| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335 | |||||||||
| Precautionary statements | P261-P280a-P304+P340-P305+P351+P338-P405-P501a-P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313 | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 24/25 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | UQ9451500 | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 29331990 | |||||||||
| Toxicity | rat,LDLo,unreported,600mg/kg (600mg/kg),Biochemical Pharmacology. Vol. 14, Pg. 1325, 1965. | |||||||||
| NFPA 704: |
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