2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE

Product Name: 2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE
CAS No.: 56430-08-1
Chemical Name: 2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE
Synonyms: 4'-METHYLPHENAZONE;4′-Methylphenazone, CAS 56430-08-1;1,5-DiMethyl-2-(p-tolyl)-1H-pyrazol-3(2H)-one;2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE;1,5-dimethyl-2-(p-tolyl)-1,2-dihydro-3H-pyrazol-3-one;1,2-dihydro-1,5-dimethyl-2-(p-tolyl)-3H-pyrazol-3-one;2,3-DIMETHYL-1-(4-METHYLPHENYL)-3- PYRAZOLIN-5-ONE 99+%;1,2-Dihydro-1,5-dimethyl-2-(4-methylphenyl)-3H-pyrazol-3-one;3H-Pyrazol-3-one, 1,2-dihydro-1,5-dimethyl-2-(4-methylphenyl)-
CBNumber: CB4242264
Molecular Formula: C12H14N2O
Formula Weight: 202.25
MOL File: 56430-08-1.mol

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2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE Property

Melting point:: 130-137 °C
Boiling point:: 340.37°C (rough estimate)
Density: 1.0838 (rough estimate)
refractive index: 1.6660 (estimate)
storage temp.: Sealed in dry,Room Temperature
solubility: Chloroform (Slightly), Methanol (Slightly)
form: Solid
pka: 0.84±0.20(Predicted)
color: Off-White to Pale Brown

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Safety

Hazard Codes: Xn
Risk Statements: 22-36
Safety Statements: 24/25-26
HS Code: 29331990

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P330Rinse mouth.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: R751928
Product name: 2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE
Purity: Aldrich<sup>CPR</sup>
Packaging: 1 unit
Price: $143
Updated: 2025/07/31

Sigma-Aldrich

Product number: R751928
Product name: 2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE
Purity: AldrichCPR
Packaging: 10mg
Price: $139
Updated: 2024/03/01

TRC

Product number: M338620
Product name: 4’-Methylphenazone
Packaging: 100mg
Price: $145
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FD143448
Product name: 1,5-Dimethyl-2-(p-tolyl)-1H-pyrazol-3(2H)-one
Packaging: 1g
Price: $243
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FD143448
Product name: 1,5-Dimethyl-2-(p-tolyl)-1H-pyrazol-3(2H)-one
Packaging: 500mg
Price: $140
Updated: 2021/12/16

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2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE Chemical Properties,Usage,Production

Chemical Properties

white to pale brown powder

Uses

A metabolite of the antipyrine analgesic drug Phenazone.

2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE Preparation Products And Raw materials

Raw materials

Preparation Products

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2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE Suppliers

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56430-08-1, 2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONERelated Search:

Antipyrine ETHYLHYDRAZINE N-ETHYL-P-TOLUIDINE TETRAMETHYLHYDRAZINE p-Acetotoluidide Acrylamide Crotylamine 4-Methylphenylhydrazine 1，2-Dimethyl hydrazine Acethydrazide CROTONAMIDE N-methyl-N-formylhydrazine N-PHENYLACRYLAMIDE Allylamine 3H-PYRAZOL-3-ONE, 1,2-DIHYDRO- ALLYLHYDRAZINE 3-Methyl-3-pyrazolin-5-one 1-ETHYL-1-PHENYLHYDRAZINE

4'-METHYLPHENAZONE

2,3-DIMETHYL-1-(4-METHYLPHENYL)-3-PYRAZOLIN-5-ONE

1,2-dihydro-1,5-dimethyl-2-(p-tolyl)-3H-pyrazol-3-one

2,3-DIMETHYL-1-(4-METHYLPHENYL)-3- PYRAZOLIN-5-ONE 99+%

1,5-DiMethyl-2-(p-tolyl)-1H-pyrazol-3(2H)-one

1,5-dimethyl-2-(p-tolyl)-1,2-dihydro-3H-pyrazol-3-one

3H-Pyrazol-3-one, 1,2-dihydro-1,5-dimethyl-2-(4-methylphenyl)-

1,2-Dihydro-1,5-dimethyl-2-(4-methylphenyl)-3H-pyrazol-3-one

4′-Methylphenazone, CAS 56430-08-1

56430-08-1