4-HYDROXYANTIPYRINE
Synonym(s):4-Hydroxy-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one;NSC 174055
- CAS NO.:1672-63-5
- Empirical Formula: C11H12N2O2
- Molecular Weight: 204.23
- MDL number: MFCD00003143
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:16:58
What is 4-HYDROXYANTIPYRINE?
The Uses of 4-HYDROXYANTIPYRINE
4-Hydroxyantipyrine is a metabolite of antipyrine (A697500) which is an analgesic and antipyretic that has been given by mouth and as ear drops. Antipyrine is often used in testing the effects of other drugs or diseases on drug-metabolizing enzymes in the liver. Antipyrine is often used in testing the effects of other drugs or diseases on drug-metabolizing enzymes in the liver.
The Uses of 4-HYDROXYANTIPYRINE
Antipyrine metabolite
The Uses of 4-HYDROXYANTIPYRINE
4-Hydroxyantipyrine was used to study the relationships between the metabolism of antipyrine, hexobarbitone and theophylline in man. It was used in a study on flow injection analysis system for the characterisation of pharmaceutical compounds via combination of diode array UV, 1H NMR, FT-IR spectroscopy and time-of-flight mass spectrometry.
Definition
ChEBI: 4-hydroxy-1,5-dimethyl-2-phenyl-3-pyrazolone is a ring assembly and a member of pyrazoles.
General Description
4-Hydroxyantipyrine is formed during oxidative deamination of aminopyrine. It is a metabolite of antipyrine.
Properties of 4-HYDROXYANTIPYRINE
| Melting point: | 184-186 °C (lit.) |
| Boiling point: | 314.3±52.0 °C(Predicted) |
| Density | 1.294±0.06 g/cm3(Predicted) |
| storage temp. | Refrigerator |
| solubility | DMSO (Slightly), Methanol (Slightly) |
| form | neat |
| pka | 11.99±0.20(Predicted) |
| form | Solid |
| color | Off-White to Beige |
Safety information for 4-HYDROXYANTIPYRINE
| Signal word | Warning |
| Pictogram(s) |
![]() Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 4-HYDROXYANTIPYRINE
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