3-Methyl-2-pyrazolin-5-one

Product Name: 3-Methyl-2-pyrazolin-5-one
CAS No.: 108-26-9
Chemical Name: 3-Methyl-2-pyrazolin-5-one
Synonyms: -5-pyrazoL;AURORA KA-6219;TIMTEC-BB SBB004372;Methyl-5-pyrazolone;3-METHYL-5-PYRAZOLONE;3-Methyl-pyrazolon-(5);3-methyl pyrazole-5-one;3-Methyl-5-pyrazolone>3-methyl-2-pyrazolin-5-on;5-Methyl-3H-pyrazol-3-one
CBNumber: CB4703239
Molecular Formula: C4H6N2O
Formula Weight: 98.1
MOL File: 108-26-9.mol

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3-Methyl-2-pyrazolin-5-one Property

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
InChI: InChI=1S/C4H6N2O/c1-3-2-4(7)6-5-3/h2H2,1H3,(H,6,7)
InChIKey: NHLAPJMCARJFOG-UHFFFAOYSA-N
SMILES: N1=C(C)CC(=O)N1
CAS DataBase Reference: 108-26-9(CAS DataBase Reference)
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)

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Safety

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.

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

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

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

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

P405Store locked up.

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N-Bromosuccinimide Price

TCI Chemical

Product number: M0491
Product name: 3-Methyl-5-pyrazolone
Purity: >98.0%(T)
Packaging: 25g
Price: $38
Updated: 2025/07/31

TCI Chemical

Product number: M0491
Product name: 3-Methyl-5-pyrazolone
Purity: >98.0%(T)
Packaging: 500g
Price: $321
Updated: 2025/07/31

TRC

Product number: M332283
Product name: 3-Methyl-1H-pyrazol-5(4H)-one
Packaging: 5g
Price: $45
Updated: 2021/12/16

Ark Pharm

Product number: P000723772
Product name: 3-Methyl-1H-pyrazol-5(4H)-one
Purity: 97%
Packaging: 10g
Price: $5
Updated: 2021/12/16

Ark Pharm

Product number: P000723772
Product name: 3-Methyl-1H-pyrazol-5(4H)-one
Purity: 97%
Packaging: 25g
Price: $8
Updated: 2021/12/16

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3-Methyl-2-pyrazolin-5-one Chemical Properties,Usage,Production

Chemical Properties

3-Methyl-2-pyrazolin-5-one is yellowish powder

Uses

3-Methyl-2-pyrazolin-5-one is used as intermediate for the manufacture of dyestuffs as well as for agrochemicals.

Uses

3-Methyl-2-pyrazolin-5-one is used in the preparation of spirocyclic [indole-3,4'-pyrano[2,3-c]pyrazole] by reacting with isatins and malonitrile in the presence of sodium bromide as electrolyte.

3-Methyl-2-pyrazolin-5-one Preparation Products And Raw materials

Raw materials

Preparation Products

CIBACRON BRILLIANT YELLOW 3G-P disodium 2,5-dichloro-4-[4-[[5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-sulphonatophenyl]azo]-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl]benzenesulphonate ACID YELLOW 11 Acid Red 215 Neutral Red 2gl Acid Yellow 127 Reactive Light Yellow M-5G Reactive Yellow 18 ACID YELLOW 76 (C.I. 18850) PROCION YELLOW H-E3G Acid Yellow 117

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3-Methyl-2-pyrazolin-5-one Suppliers

Americas 1 Austria 1 Belgium 1 Canada 1 China 195 Europe 3 Germany 3 India 29 Japan 5 Slovakia 1 South Korea 1 Switzerland 3 Ukraine 1 United Kingdom 10 United States 31 Global 286

Whyte Chemicals

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View Lastest Price from 3-Methyl-2-pyrazolin-5-one manufacturers

Henan Fengda Chemical Co., Ltd

Product: 3-methyl-2-pyrazolin-5-one 108-26-9
Price: US $10.00-3.00/kg
Min. Order: 1kg
Purity: 99%
Supply Ability: g-kg-tons, free sample is available
Release date: 2024-04-29

Career Henan Chemical Co

Product: 3-Methyl-2-pyrazolin-5-one 108-26-9
Price: US $1.00/kg
Min. Order: 1kg
Purity: 98%min
Supply Ability: as request
Release date: 2018-12-23

108-26-9, 3-Methyl-2-pyrazolin-5-oneRelated Search:

Methyl salicylate Furazolidone Tribenuron methyl Cefazolin sodium salt Pirimiphos-methyl 2-Methyl-4-isothiazolin-3-one Cefazolin 5-Methyl-1H-benzotriazole METSULFURON METHYL Kresoxim-methyl Tolyltriazole Methyl acetate Triadimefon 1-CHLOROMETHYL-1H-1,2,4-TRIAZOLE Thiophanate-methyl Methyl 1-phenyl-3-methyl-5-pyrazolone(PMP),1-Phenyl-3-methyl-2-pyrazolin-5-one ACID YELLOW 76 (C.I. 18850)

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TIMTEC-BB SBB004372

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3-methyl-2-pyrazolin-5-on

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5-Methyl-2,4-dihydro-3H-pyrazol-3-one

AURORA KA-6219

3-METHYL-4,5-DIHYDRO-1H-PYRAZOL-5-ONE

3-METHYL-5-PYRAZOLONE

3-METHYL-2-PYRAZOLIN-5-ONE

3-methyl-4,5-dihydro-1H-pyrazol-5-one 97%

2,4-dihydro-5-methyl-3H-pyrazol-3-one

5-methyl-1,2-dihydro-pyrazol-3-one

5-Methyl-3H-pyrazol-3-one

3-Methyl-2-pyrazolin-5-one, 98+%

Methyl-5-pyrazolone

2,4-dihydro-5-methyl-3h-pyrazol-3-on

3-METHYL-5-PYRAZOLONE 98+%

5-Methyl-2,4-dihydro-pyrazol-3-one

3-Methyl-5-oxo-2-pyrazoline

3-Methyl-1H-pyrazol-5(4H)-one

3-Methyl-5-pyrazolone&gt

-5-pyrazoL

3-methyl-1,4-dihydropyrazol-5-one

108-26-9

108-6-9