Type a chemical, a CAS number or a product code, and Sourzi puts every check it can run on one card: the chemical register, the duty, anti dumping cases and the supplier.
Each row shows the official file it came from and the date of that file. Where Sourzi does not hold the answer, the row says so instead of guessing.
China to the United States
Hydrogen sulfide
CAS 7783-06-4 · Product code 2811.19 · Full CAS page
One row needs a check before you order, and one row is a gap Sourzi cannot fill yet.
TSCA (US register)
Listed
CAS 7783-06-4 is on the TSCA inventory (ACTIVE), the US chemical register.
More than one US rate is stored under 281119 (2.3%, Free, 4.2%, ), so the full 10 digit code decides the rate.
USITC tariff extract · file dated 25 Sep 2026
Section 301 (China)
Not stored
Sourzi does not store the Section 301 rate on goods of China yet, so this row is a gap, not a guess. Confirm the rate with your customs broker before you price the order. No stored Section 301 exclusion matches this code.
Add the supplier's company name to screen it against the DFAT sanctions list and the US UFLPA Entity List.
Watch Hydrogen sulfide
Duty rates, anti dumping cases and register listings change after you have checked them once. Sourzi is building a daily watch that emails you the day a row on this card changes.
Leave your email and you get one message when the watch is live for Hydrogen sulfide, and nothing else.
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