Dioctyl Phthalate (DOP)
Dioctyl phthalate (DOP), chemically bis(2-ethylhexyl) phthalate, is the most common dioctyl orthophthalate used as a plasticizer for PVC. It falls under HTS 2917.32.00.00 as it is a derivative of orthophthalic acid (1,2-benzenedicarboxylic acid) esterified with two octyl alcohol molecules. This aromatic polycarboxylic acid ester is supplied as a clear, oily liquid for industrial plasticizing applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If mixed isomers or ethylhexyl variants predominate
Other esters of orthophthalic acid fall under the residual 2917.39 subheading when not specifically dioctyl orthophthalates.
If when supplied as PVC plasticizer mixture with solvents or stabilizers
Prepared chemical mixtures for specific industrial use (not pure compounds) classify in Chapter 38 per Chapter 29 exclusions.
If dissolved in petroleum distillates exceeding safety/transport limits
Organic compounds in solvents rendering them suitable for specific use (not general) exclude from Chapter 29 per note (e).
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Import Tips & Compliance
• Verify chemical purity and provide Certificate of Analysis (CoA) confirming dioctyl orthophthalate composition to avoid reclassification as mixtures
• Ensure proper UN 3082 hazardous material declaration for transport as environmentally hazardous substance in non-bulk packaging
• Include stabilizer content documentation; additions beyond safety/transport limits may shift classification per Chapter 29 note (g)
Related Products under HTS 2917.32.00.00
Bis(2-Ethylhexyl) Phthalate (DEHP)
Bis(2-ethylhexyl) phthalate (DEHP), synonymous with DOP, is a branched-chain dioctyl orthophthalate plasticizer for flexible PVC products. Classified under HTS 2917.32.00.00 as the principal commercial form of dioctyl orthophthalates derived from phthalic anhydride and 2-ethylhexanol. Used extensively in wire insulation, flooring, and medical tubing.
Dioctyl Orthophthalate Stabilized Grade
Industrial-grade dioctyl orthophthalate with added epoxidized soybean oil stabilizer for enhanced PVC processing stability. Qualifies under HTS 2917.32.00.00 per Chapter 29 note (f) allowing stabilizers necessary for preservation/transport. The primary dioctyl orthophthalate structure determines classification.
High-Purity Dioctyl Phthalate 99.5%
Ultra-high purity dioctyl orthophthalate (99.5% min) for medical-grade PVC and sensitive electronics applications. Falls squarely under HTS 2917.32.00.00 as chemically defined dioctyl orthophthalate per Chapter 29 note (a). Supplied in nitrogen-purged drums to maintain specification.
DOP Plasticizer Technical Grade
Technical grade dioctyl orthophthalate meeting ASTM D1045 standards for general PVC plasticizing. Classified HTS 2917.32.00.00 as the dioctyl orthophthalate molecule dominates per Chapter 29 classification rules. Widely used in flooring, wallcoverings, and coated fabrics.