3-Mercaptopropionic Acid from Japan
3-Mercaptopropionic acid (HSCH₂CH₂COOH) is a straight-chain organo-sulfur carboxylic acid with sulfur directly linked to carbon, falling under HTS 2930.90.4950. Excluded from sulfonated derivatives per Chapter 29 note 6; qualifies as chemically defined compound. Applications include surface modification and polymer cross-linking.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Provide FTIR spectra confirming absence of sulfonic/sulfonyl groups excluded from heading 2930
• Declare if anti-dusting agent added per Chapter 29(g); must not render product use-specific
• Verify batch purity >95% to maintain 'separate chemically defined' status