Restricted or banned substances
Substances on this list are banned or restricted under the named regulation. This page is a compliance reference — verify your obligations under applicable law.
CAS 136-40-3
4-hexylresorcinol
pharmaceutical raw material
Phenazopyridine hydrochloride is an active pharmaceutical ingredient used in pharmaceutical manufacturing. According to an independent committee of scientific and health experts, it can cause cancer.
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 Phenazopyridine hydrochloride (CAS 136-40-3) is 2933.39.
2933.39
2933 39 99
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
3-phenyldiazenylpyridine-2,6-diamine;hydrochloride
QQBPIHBUCMDKFG-UHFFFAOYSA-N
C1=CC=C(C=C1)N=NC2=C(N=C(C=C2)N)N.Cl