1-Butanethiol from China
1-Butanethiol (n-butyl mercaptan) is an acyclic aliphatic thiol with formula CH3(CH2)3SH, a separate chemically defined organo-sulfur compound. Classified in 2930.90.92 as other organo-sulfur compounds where sulfur is directly linked to carbon atom. Used in odorant applications and organic synthesis.
Duty Rate — China → United States
16.2%
Rate breakdown
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Include CAS number (109-79-5) and structural formula in commercial invoice for Customs verification
• Comply with DOT hazardous material regulations for transport; label as UN2347 flammable liquid
• Test for impurities to ensure it qualifies as chemically defined compound per Chapter 29 note (a)