Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one
Price: Check
Purity: 97.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: 2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one
Price: ￥268.0/5g ￥948.0/25g
Purity: 97.0%
Stocking Period: Inquiry
Contact: Liu jia
Email: 2130147988@qq.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

Zhongshan Xingrui Chemical Co. , Ltd.
China
Product Name: 2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one
Price: ￥Inquiry/25kg
Purity: 99.0%
Stocking Period: Inquiry
Contact: Wang Jie
Email: 3096638339@qq.com

86-92-0

86-92-0 structure

86-92-0 structure

Name: 2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one
Chemical Name: 2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one
CAS Number: 86-92-0
Molecular Formula: C₁₁H₁₂N₂O
Molecular Weight: 188.226
Catalog: API Antineoplastic agents Tinic antineoplastic agents
Create Date: 2019-01-10 07:14:23
Modify Date: 2025-09-11 10:41:44

Name	2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one
Synonyms	EINECS 201-708-4 5-methyl-2-(4-methylphenyl)-4H-pyrazol-3-one MFCD00035708 5-Methyl-2-(4-methylphenyl)-2,4-dihydro-3H-pyrazol-3-one 2,4-Dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one 3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-2-(4-methylphenyl)-

Density	1.1±0.1 g/cm3
Boiling Point	365.1±21.0 °C at 760 mmHg
Melting Point	129 °C
Molecular Formula	C₁₁H₁₂N₂O
Molecular Weight	188.226
Flash Point	174.6±22.1 °C
Exact Mass	188.094955
PSA	32.67000
LogP	0.90
Vapour Pressure	0.0±0.8 mmHg at 25°C
Index of Refraction	1.595

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UQ9680000

CHEMICAL NAME :: 2-Pyrazolin-5-one, 3-methyl-1-p-tolyl-

CAS REGISTRY NUMBER :: 86-92-0

LAST UPDATED :: 199709

DATA ITEMS CITED :: 2

MOLECULAR FORMULA :: C11-H12-N2-O

MOLECULAR WEIGHT :: 188.25

WISWESSER LINE NOTATION :: T5NNV DHJ BR D1& E1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 7450 mg/kg

TOXIC EFFECTS :: Behavioral - somnolence (general depressed activity) Skin and Appendages - hair

REFERENCE :: LONZA# Personal Communication from LONZA Ltd., CH-4002, Basel, Switzerland Volume(issue)/page/year: 26APR1982

Hazard Codes	Xn
Risk Phrases	22
RTECS	UQ9680000
HS Code	2933199090

637-60-5 structure

637-60-5

141-97-9 structure

141-97-9

~%

86-92-0 structure

86-92-0

Literature: Tetrahedron Letters, , vol. 53, # 49 p. 6650 - 6653

624-31-7 structure

624-31-7

108-26-9 structure

108-26-9

~77%

86-92-0 structure

86-92-0

Literature: Xu, Xiu-Hua; Wang, Xin; Liu, Guo-Kai; Tokunaga, Etsuko; Shibata, Norio Organic Letters, 2012 , vol. 14, # 10 p. 2544 - 2547

141-97-9 structure

141-97-9

539-44-6 structure

539-44-6

~64%

86-92-0 structure

86-92-0

Literature: Jing, Lingling; Wang, Liang; Zhao, Yinglan; Tan, Rui; Xing, Xiumei; Liu, Ting; Huang, Wencai; Luo, Youfu; Li, Zicheng Journal of Chemical Research, 2012 , vol. 36, # 12 p. 691 - 696

Precursor 5
637-60-5 141-97-9 624-31-7 108-26-9
539-44-6
DownStream 2
350997-70-5 73097-75-3

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%

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