4-Phenylbutyric Acid Anhydride
Symmetric anhydride of 4-phenylbutyric acid, classified with parent aromatic monocarboxylic acid under HTS 2915.60.10.00. Acylation agent in organic synthesis.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If other saturated acyclic anhydrides
Non-aromatic anhydrides fall under general saturated acyclic anhydride subheading.
If complete carboxylic acid salts
Certain complete salts or chelates classify under later oxygen-function headings.
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Import Tips & Compliance
• Confirm monomeric anhydride vs polymeric per exclusion notes; hazardous material declarations required; purity testing prevents polymer misclassification
Related Products under HTS 2915.60.10.00
Sodium Phenylbutyrate
Sodium phenylbutyrate is the sodium salt of 4-phenylbutanoic acid, an aromatic saturated acyclic monocarboxylic acid. It falls under HTS 2915.60.10.00 as a salt of an aromatic butanoic acid, fitting Chapter 29 note (C)(1) for inorganic salts of organic acid-function compounds classified with the parent acid. Used primarily in medical treatments for urea cycle disorders.
4-Phenylbutyric Acid
4-Phenylbutyric acid (C6H5(CH2)3COOH) is a saturated acyclic monocarboxylic butanoic acid with an aromatic phenyl substituent. Classified under HTS 2915.60.10.00 as an aromatic derivative of butanoic acid per heading 2915 structure. Used in chemical synthesis and as a histone deacetylase inhibitor.
Methyl 4-Phenylbutyrate
Methyl 4-phenylbutyrate is the methyl ester of 4-phenylbutanoic acid, an aromatic butanoic acid ester. Falls under HTS 2915.60.10.00 per Chapter 29 note classifying esters with the parent acid-function compound occurring last in numerical order. Used as fragrance intermediate and flavoring agent.
Ethyl 4-Phenylbutyrate
Ethyl ester of 4-phenylbutyric acid, specifically classified with the parent aromatic butanoic acid under HTS 2915.60.10.00 per Chapter 29 note (B) for ethyl esters. Common in flavor and fragrance industry as apple-like aroma compound.
Calcium 4-Phenylbutyrate
Calcium salt of 4-phenylbutanoic acid, classified as aromatic butanoic acid salt under HTS 2915.60.10.00 following Chapter 29 note (C)(1). Used in nutritional supplements and pharmaceutical formulations.
4-Phenylbutyryl Chloride
Acid chloride derivative of 4-phenylbutanoic acid, classified with parent aromatic acid under HTS 2915.60.10.00 per Chapter 29 note (E). Reactive intermediate for ester and amide synthesis in organic chemistry.