3-methyl-2-pyrazolin-5-one

Suppliers

Names

[ CAS No. ]:
108-26-9

[ Name ]:
3-methyl-2-pyrazolin-5-one

[Synonym ]:
2,4-Dihydro-5-methyl-3H-pyrazol-3-one
MFCD00020699
3-Methyl-5-pyrazolone
EINECS 203-565-3
5-Methyl-2,4-dihydro-3H-pyrazol-3-one
3-methyl-1,4-dihydropyrazol-5-one
3-Methyl-1H-pyrazol-5(4H)-one
3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-
3-methyl-2-pyrazolin-5-one

Chemical & Physical Properties

[ Density]:
1.3±0.1 g/cm3

[ Boiling Point ]:
309.7ºC at 760 mmHg

[ Melting Point ]:
220-224 °C

[ Molecular Formula ]:
C₄H₆N₂O

[ Molecular Weight ]:
98.103

[ Flash Point ]:
141.1ºC

[ Exact Mass ]:
98.048012

[ PSA ]:
41.46000

[ LogP ]:
-1.08

[ Vapour Pressure ]:
0.000345mmHg at 25°C

[ Index of Refraction ]:
1.599

[ Storage condition ]:
2~8°C

MSDS

Click to get detail MSDS

Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UQ9451500

CHEMICAL NAME :: 2-Pyrazolin-5-one, 3-methyl-

CAS REGISTRY NUMBER :: 108-26-9

LAST UPDATED :: 199701

DATA ITEMS CITED :: 2

MOLECULAR FORMULA :: C4-H6-N2-O

MOLECULAR WEIGHT :: 98.12

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LDLo - Lowest published lethal dose

ROUTE OF EXPOSURE :: Unreported

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 600 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: BCPCA6 Biochemical Pharmacology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.1- 1958- Volume(issue)/page/year: 14,1325,1965

Safety Information

[ Personal Protective Equipment ]:
Eyeshields;Gloves;type N95 (US);type P1 (EN143) respirator filter

[ Hazard Codes ]:
Xi

[ Risk Phrases ]:
36/37/38

[ Safety Phrases ]:
S24/25

[ RIDADR ]:
NONH for all modes of transport

[ RTECS ]:
UQ9451500

[ HS Code ]:
2933199090

Synthetic Route

Click to get detail synthetic route

Precursor & DownStream

Precursor

Ethyl acetoacetate
4-Chlorobenzaldehyde
Malononitrile
Phenylhydrazine
ethyl 2-acetyl-4,4,5,5,6,6,7,7,8,8,9,9,9-tridecafluoro-3-oxononanoate
Isoniazid
ethyl 2-acetylacetoacetate
N-acetoacetylphenylhydroxyloamine
Methyl acetoacetate

DownStream

4,4-dibromo-5-methyl-2H-pyrazol-3-one
2-ethyl-5-methyl-4H-pyrazol-3-one
2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one
2,3-Dimethyl-3-pyrazolin-5-one
Methyl 2-butynoate
3,4-Dimethyl-1H-pyrazol-5-ol
Butyric Acid
5-hydroxy-3-methyl-4-(phenylazo)pyrazole
3H-Pyrazol-3-one,2,4-dihydro-5-methyl-4-[(phenylamino)methylene]-
bis-(2-amino-benzylidene)-hydrazine

Customs

[ HS Code ]: 2933199090

[ Summary ]:
2933199090. other compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%