C11H11N3O2
217.22 g/mol
Research ReagentWarning
4-Nitrosoantipyrine
CAS885-11-0EC212-941-6
Category
Research Reagent
Compound Class
Heterocycle
Primary Use
Research Compound
4-Nitrosoantipyrine is a research compound used as a reference standard for nitrosamine impurities. It is a derivative of antipyrine with a nitroso functional group, and its structure is confirmed by the provided chemical data.
Reference standard for nitrosamine impurity analysis
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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Referencesame scaffold
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Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 4-Nitrosoantipyrine (CAS 885-11-0) is 2933.11.
HS code (international, 6-digit)
2933.11
EU CN code (8-digit)
2933 11 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
1,5-dimethyl-4-nitroso-2-phenylpyrazol-3-one
InChIKey
IEODZSWSXNQPQL-UHFFFAOYSA-N
SMILES
CC1=C(C(=O)N(N1C)C2=CC=CC=C2)N=O
Synonyms (15)
- 4-Nitrosoantipyrin
- 4-Nitrosoantipyrine
- ANTIPYRINE, 4-NITROSO-
- Nitrosoantipyrin
- Nitrosoantipyrine
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