3H-Pyrazol-3-one,1,2-dihydro-1,5-dimethyl-4-nitroso-2-phenyl-

Modify Date: 2025-08-23 20:23:05

3H-Pyrazol-3-one,1,2-dihydro-1,5-dimethyl-4-nitroso-2-phenyl- Structure
3H-Pyrazol-3-one,1,2-dihydro-1,5-dimethyl-4-nitroso-2-phenyl- structure
Common Name 3H-Pyrazol-3-one,1,2-dihydro-1,5-dimethyl-4-nitroso-2-phenyl-
CAS Number 885-11-0 Molecular Weight 217.22400
Density 1.26g/cm3 Boiling Point 306.5ºC at 760 mmHg
Molecular Formula C11H11N3O2 Melting Point N/A
MSDS N/A Flash Point 139.2ºC

 Names

Name 1,5-dimethyl-4-nitroso-2-phenylpyrazol-3-one
Synonym More Synonyms

 Chemical & Physical Properties

Density 1.26g/cm3
Boiling Point 306.5ºC at 760 mmHg
Molecular Formula C11H11N3O2
Molecular Weight 217.22400
Flash Point 139.2ºC
Exact Mass 217.08500
PSA 56.36000
LogP 1.88230
Index of Refraction 1.621

 Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
CD3027000
CHEMICAL NAME :
Antipyrine, 4-nitroso-
CAS REGISTRY NUMBER :
885-11-0
BEILSTEIN REFERENCE NO. :
0201816
LAST UPDATED :
199612
DATA ITEMS CITED :
1
MOLECULAR FORMULA :
C11-H11-N3-O2
MOLECULAR WEIGHT :
217.25

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

MUTATION DATA

TYPE OF TEST :
Mutation in microorganisms
TEST SYSTEM :
Bacteria - Salmonella typhimurium
DOSE/DURATION :
10 ug/plate
REFERENCE :
MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 57,287,1978

 Safety Information

HS Code 2933199090

 Synthetic Route

~23%

3H-Pyrazol-3-one,1,2-dihydro-1,5-dimethyl-4-nitroso-2-phenyl- Structure

3H-Pyrazol-3-on...

CAS#:885-11-0

Literature: Stankyavichyus, A. P.; Terent'ev, P. B.; Solov'ev, O. A. Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989 , vol. 25, # 9 p. 1041 - 1045 Khimiya Geterotsiklicheskikh Soedinenii, 1989 , # 9 p. 1243 - 1247

~%

3H-Pyrazol-3-one,1,2-dihydro-1,5-dimethyl-4-nitroso-2-phenyl- Structure

3H-Pyrazol-3-on...

CAS#:885-11-0

Literature: Thoms; Schnupp Justus Liebigs Annalen der Chemie, 1923 , vol. 434, p. 310

 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%

 Synonyms

1,5-dimethyl-4-nitroso-2-phenyl-1,2-dihydro-pyrazol-3-one
4-Nitrosoantipyrin
2,3-dimethyl-4-nitroso-1-phenylpyrazol-5-one
2,3-Dimethyl-4-nitroso-1-phenyl-3-pyrazolin-5-one
4-Nitrosoantipyrine
EINECS 212-941-6
ANTIPYRINE,4-NITROSO
4-nitrosophenazone
1,5-dimethyl-4-nitroso-2-phenyl-1H-pyrazol-3(2H)-one
1,2-dihydro-2,3-dimethyl-4-nitroso-1-phenylpyrazol-5-one
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