5-Hydroxy-1-methylpyrazole
Synonym(s):1-Methyl-1H-pyrazol-5-ol;5-Hydroxy-1-methylpyrazole;1-Methyl-5-hydroxypyrazole;2-Methyl-2H-pyrazol-3-ol;1-Methylpyrazol-5-ol
- CAS NO.：33641-15-5
- Empirical Formula: C4H6N2O
- Molecular Weight: 98.1
- MDL number: MFCD05864418
- EINECS: 213-317-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-04-24 14:56:55
What is 5-Hydroxy-1-methylpyrazole?
The Uses of 5-Hydroxy-1-methylpyrazole
5-Hydroxy-1-methylpyrazole is a pyrazole derivative used as an intermediate in the preparation of herbicides.
Properties of 5-Hydroxy-1-methylpyrazole
| Melting point: | 110-114 °C |
| Boiling point: | 217.7±13.0 °C(Predicted) |
| Density | 1.22±0.1 g/cm3(Predicted) |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | soluble in DMSO, Methanol |
| form | powder to crystal |
| pka | 9.07±0.23(Predicted) |
| color | White to Orange to Green |
Safety information for 5-Hydroxy-1-methylpyrazole
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H318:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. |
Computed Descriptors for 5-Hydroxy-1-methylpyrazole
| InChIKey | CMXOTACIOGGSNH-UHFFFAOYSA-N |
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