Propionic Anhydride
Propionic anhydride, (CH3CH2CO)2O, is the mixed anhydride of propionic acid used in acetylation reactions and pharmaceutical intermediates. Although the heading mentions anhydrides, this falls in 'other' as not specifically provided for. Highly reactive, pungent liquid.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing other functional groups
Simple propionic anhydride remains in propionic acid subheading per chapter structure.
If when further reacted into heterocycles
Derivatives forming heterocyclic rings move to Chapter 29 subchapter F.
If herbicide intermediate use
Pesticide intermediates classified by end-use in Chapter 38.
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Import Tips & Compliance
• Classify as UN 2502, Corrosive liquid, requiring specific packaging group II containers
• Include reactivity data sheet due to violent reaction with water and strong oxidizing agents
• Prevent reclassification to 2915.90 by providing molecular formula C6H10O3 confirmation
Related Products under HTS 2915.50.50.00
Sodium Propionate
Sodium propionate is the sodium salt of propionic acid, a saturated acyclic monocarboxylic acid. It falls under HTS 2915.50.50.00 as a salt of propionic acid not specifically provided for elsewhere in the subheading. Commonly used as a food preservative to inhibit mold growth.
Isopropyl Propionate
Isopropyl propionate is an ester formed from propionic acid and isopropanol, used as a flavoring agent and solvent. Falls under HTS 2915.50.50.00 as an 'other' ester of propionic acid per chapter note A on ester classification. Clear, colorless liquid with fruity odor.
Methyl Propionate
Methyl propionate, the methyl ester of propionic acid, serves as an intermediate in pharmaceutical synthesis and flavor applications. HTS 2915.50.50.00 classification follows chapter note A, assigning esters to the parent acid heading occurring last numerically.
Ethyl Propionate
Ethyl propionate (CH3CH2COOCH2CH3) is the ethyl ester of propionic acid used in fruit flavorings and as a printing ink solvent. Classified per chapter note B with the corresponding propionic acid heading. Colorless liquid with apple-like odor.
N-Propyl Propionate
N-propyl propionate is a short-chain ester used in coatings, adhesives, and as a flavor intermediate. HTS 2915.50.50.00 applies to this 'other' propionic acid ester following chapter ester classification rules. Low-odor, medium-evaporating solvent.
Ammonium Propionate
Ammonium propionate (NH4C2H5COO) serves as a dough conditioner and intermediate for other propionates. As a salt of propionic acid, classified under HTS 2915.50.50.00 per chapter note C(1) for organic salts. White crystalline solid.