Isobutyric Acid
Isobutyric acid (2-methylpropanoic acid) is a saturated acyclic monocarboxylic acid used in organic synthesis, flavorings, and as an intermediate for pharmaceuticals. It falls under HTS 2915.90.18.90 as a saturated acyclic monocarboxylic acid not elsewhere specified in heading 2915. This classification follows Chapter 29 notes for separate chemically defined organic compounds.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sold with added stabilizer for preservation
Per Chapter 29 note 2(f), products with added stabilizers necessary for preservation remain classified with the parent acid but under the stabilized subheading.
If imported as a formulated mixture exceeding 70% purity
Mixtures of chemicals not meeting Chapter 29 purity criteria fall under prepared chemical preparations in Chapter 38.
If in aqueous solution for safety/transport
Chapter 29 note 2(d) allows aqueous solutions of qualifying organic compounds to remain classified with the parent compound under specific conditions.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide Safety Data Sheets (SDS) and purity certificates to verify chemical identity and compliance with TSCA regulations
• Ensure proper Hazard Class 8 labeling for corrosive properties during transport
• Avoid misclassification as aromatic acids (2916) by confirming acyclic saturated structure via COA
Related Products under HTS 2915.90.18.90
Pivalic Acid
Pivalic acid (trimethylacetic acid, 2,2-dimethylpropanoic acid) is a branched saturated acyclic monocarboxylic acid used in pharmaceuticals, pesticides, and polymer synthesis. Classified under HTS 2915.90.18.90 as 'other' saturated acyclic monocarboxylic acids per Chapter 29 structure-based classification.
2-Ethylhexanoic Acid
2-Ethylhexanoic acid is a saturated acyclic branched-chain monocarboxylic acid used in paint driers, PVC stabilizers, and metal soaps. It qualifies for HTS 2915.90.18.90 as a non-enumerated saturated acyclic monocarboxylic acid under Chapter 29 heading 2915 structure rules.
Neodecanoic Acid
Neodecanoic acid (versatic acid) is a highly branched saturated acyclic C10 monocarboxylic acid used in synthetic lubricants, paint coalescents, and metalworking fluids. Falls under HTS 2915.90.18.90 per Chapter 29 for other saturated acyclic monocarboxylic acids.
2-Methylbutyric Acid
2-Methylbutyric acid is a C5 branched saturated acyclic monocarboxylic acid with natural apple-like odor, used in flavors, fragrances, and pharmaceuticals. Classified in HTS 2915.90.18.90 as other saturated acyclic monocarboxylic acids not specifically named in prior subheadings.
Valproic Acid
Valproic acid (2-propylpentanoic acid) is a branched-chain saturated acyclic monocarboxylic acid used as an antiepileptic drug and mood stabilizer. It falls under HTS 2915.90.18.90 as a saturated acyclic monocarboxylic acid prior to pharmaceutical formulation per Chapter 29 classification rules.
Cyclohexanecarboxylic Acid
Cyclohexanecarboxylic acid contains a saturated cyclohexane ring making it cycloaliphatic rather than acyclic, but sometimes misclassified. Actually belongs in 2916.20, shown here to illustrate common error vs true 2915.90.18.90 acyclic products.