Crotonic Acid
Crotonic acid (2-butenoic acid, CH3CH=CHCOOH) is an unsaturated acyclic monocarboxylic acid with a trans double bond. Classified under HTS 2916.19.50.00 as 'other' unsaturated acyclic acids. Used in resins, plastics, and pharmaceuticals.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 3.7% | +25.0% | 28.7% |
| 🇲🇽Mexico | 3.7% | — | 3.7% |
| 🇨🇦Canada | 3.7% | — | 3.7% |
| 🇩🇪Germany | 3.7% | — | 3.7% |
| 🇯🇵Japan | 3.7% | — | 3.7% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If saturated equivalent (butyric acid)
Saturated acyclic acids fall in 2915; unsaturation moves to 2916 per heading structure.
If cyclic monocarboxylic acid
Cyclic structure shifts classification from acyclic unsaturated (2916.19) to cyclic (2916.20).
If pesticide/herbicide formulation
Specific end-use formulations excluded from Chapter 29 per note 2(k) and classified by function.
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Import Tips & Compliance
• Submit certificate of analysis verifying trans-crotonic acid structure (CAS 3724-65-0 or 97-65-4) to distinguish from isomers
• Declare if stabilized with hydroquinone; note Chapter 29(f) allows stabilizers without reclassification
• Avoid bulk aqueous shipments over 50% concentration to prevent Chapter 29 note (d) exclusion issues
Related Products under HTS 2916.19.50.00
Methacrylic Acid
Methacrylic acid is an unsaturated acyclic monocarboxylic acid with the formula CH2=C(CH3)COOH, featuring a carbon-carbon double bond. It falls under HTS 2916.19.50.00 as an 'other' unsaturated acyclic monocarboxylic acid not specifically enumerated elsewhere in the subheading. Commonly used in the production of acrylic polymers and resins.
Sorbic Acid
Sorbic acid (2,4-hexadienoic acid, CH3CH=CH-CH=CHCOOH) is a polyunsaturated acyclic monocarboxylic acid used as a food preservative. Falls under HTS 2916.19.50.00 as 'other' unsaturated acyclic monocarboxylic acid. Its conjugated double bonds characterize its antimicrobial properties.
Oleic Acid
Oleic acid (cis-9-octadecenoic acid) is a long-chain unsaturated acyclic monocarboxylic acid with one double bond, derived from vegetable oils. Classified in HTS 2916.19.50.00 as 'other' unsaturated acyclic acid. Widely used in cosmetics, soaps, and lubricants.
Undecylenic Acid
Undecylenic acid (10-undecenoic acid, CH2=CH(CH2)8COOH) is an unsaturated acyclic monocarboxylic acid with terminal double bond, produced from castor oil. HTS 2916.19.50.00 classification as 'other' unsaturated acid. Used in antifungal treatments and polymers.
Myristoleic Acid
Myristoleic acid (cis-9-tetradecenoic acid) is a C14:1 unsaturated acyclic monocarboxylic fatty acid found in fish oils. Classified under HTS 2916.19.50.00 as other unsaturated acyclic monocarboxylic acid. Used in biochemical research and cosmetics.
Palmitoleic Acid
Palmitoleic acid (cis-9-hexadecenoic acid, C16:1) is an omega-7 monounsaturated acyclic fatty acid abundant in macadamia oil. HTS 2916.19.50.00 as other unsaturated acyclic monocarboxylic acid. Applied in skincare and nutritional supplements.