Safety Reference
Warning
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Sourcing 4-Nitrosoantipyrine?
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Sourcing 4-Nitrosoantipyrine?
Post a free purchase request — no account needed. It reaches suppliers of this product, and replies go straight to your inbox.
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.
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.
The international HS code for 4-Nitrosoantipyrine (CAS 885-11-0) is 2933.11.
2933.11
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.
1,5-dimethyl-4-nitroso-2-phenylpyrazol-3-one
IEODZSWSXNQPQL-UHFFFAOYSA-N
CC1=C(C(=O)N(N1C)C2=CC=CC=C2)N=O