Safety Reference
Warning
H302Harmful if swallowed
H351Suspected of causing cancer
H372Causes damage to organs through prolonged or repeated exposure
Regulatory Compliance
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 56-04-2
Γ-aminobutyric acid
pharmaceutical raw material
Methylthiouracil is an organosulfur compound used as an antithyroid active pharmaceutical ingredient. It is a thioamide structurally related to propylthiouracil, sharing a similar mechanism of action and side effect profile.
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 Methylthiouracil (CAS 56-04-2) is 2933.59.
2933.59
2933 59 95
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
6-methyl-2-sulfanylidene-1H-pyrimidin-4-one
HWGBHCRJGXAGEU-UHFFFAOYSA-N
CC1=CC(=O)NC(=S)N1