U.S. Customs and Border Protection · CROSS Database · 1 HTS code referenced
Primary HTS Code
:2922.49.4050
$33.1M monthly imports
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Ruling Age
27 years
Data compiled from CBP CROSS Rulings, Census Bureau Trade Data · As of 2026-04-30 · Updates monthly
The tariff classification of DL-Isoleucine (CAS # 443-79-8) from Italy
NY D81280 September 25, 1998 CLA-2-29:RR:NC:2:240 D81280 CATEGORY: Classification TARIFF NO.:2922.49.4050 Mr. Joseph J. Chivini Austin Chemical Company, Inc. 1565 Barclay Boulevard Buffalo Grove, Illinois 60089-4537 RE: The tariff classification of DL-Isoleucine (CAS # 443-79-8) from Italy Dear Mr. Chivini: In your letter dated August 5, 1998, you requested a tariff classification ruling. The applicable subheading for DL-Isoleucine will be 2922.49.4050, Harmonized Tariff Schedule of the United States (HTS), which provides for oxygen-function amino-compounds: Amino-acids and their esters, other than those containing more than one kind of oxygen function; salts thereof: Other: Other: Amino acids..... Other..... The rate of duty will be 4.2 percent ad valorem. This ruling is being issued under the provisions of Part 177 of the Customs Regulations (19 C.F.R. 177). A copy of the ruling or the control number indicated above should be provided with the entry documents filed at the time this merchandise is imported. If you have any questions regarding the ruling, contact National Import Specialist Stephanie Joseph at 212-466-5768. Sincerely, Robert B. Swierupski Director, National Commodity Specialist Division