Chapter 2917 — Customs Tariff Headings

Ammonium Oxalate

Ammonium oxalate, also known as diammonium oxalate, is a salt of oxalic acid used in textile dyeing and as an analytical reagent. As an inorganic salt of an organic acid, it is classified under tariff item 2917.11.00 per Chapter 29 Note 5(C)(1), which directs salts to the heading of the parent organic compound.

Calcium Oxalate

Calcium oxalate monohydrate is an insoluble white powder used in ceramics and as an analytical standard. As a salt of oxalic acid, it is classified under tariff item 2917.11.00 per Chapter 29 Note 5(C)(1), which keeps inorganic salts of organic acids with the parent acid heading.

Dibutyl Oxalate

Dibutyl oxalate is an ester of oxalic acid used as a plasticizer intermediate and solvent. Per Chapter 29 Note 5(A), esters of acid-function organic compounds are classified with the compound that occurs last in numerical order; since oxalic acid (2917) is the acid component, the ester falls under 2917.11.00.

Diethyl Oxalate

Diethyl oxalate is the ethyl ester of oxalic acid, used in pharmaceutical synthesis and dye manufacturing. As an ester of oxalic acid, it is classified under tariff item 2917.11.00 per Chapter 29 Note 5(A), which assigns esters to the heading of the acid component when it occurs last in numerical order.

Dimethyl Oxalate

Dimethyl oxalate is the dimethyl ester of oxalic acid, used as a solvent and chemical intermediate. It falls under tariff item 2917.11.00 as an ester of oxalic acid, per Chapter 29 Note 5(A) which classifies esters with the acid component's heading.

Dipotassium Oxalate

Dipotassium oxalate is a potassium salt of oxalic acid used in laboratory analysis and as a precipitating agent. As an inorganic salt of an organic acid, it is classified under tariff item 2917.11.00 per Chapter 29 Note 5(C)(1), which keeps salts with the parent acid heading.

Disodium Oxalate

Disodium oxalate is the anhydrous sodium salt of oxalic acid, used in water treatment and as a calibration standard. It is classified under tariff item 2917.11.00 per Chapter 29 Note 5(C)(1), which directs inorganic salts of organic acids to the heading of the parent acid.

Ethyl Methyl Oxalate

Ethyl methyl oxalate is a mixed ester of oxalic acid used as a specialty solvent and intermediate. As an ester of oxalic acid, it falls under tariff item 2917.11.00 per Chapter 29 Note 5(A), which classifies esters with the acid component's heading when it occurs last in numerical order.

Ferric Ammonium Oxalate

Ferric ammonium oxalate is a coordination compound of iron and oxalate, used in blueprint photography and iron analysis. Per Chapter 29 Note 5(C)(3), coordination compounds are classified by cleaving metal bonds; the resulting organic fragments are oxalate, so it falls under tariff item 2917.11.00.

Oxalic Acid 10% Solution

Oxalic acid 10% solution is an aqueous solution of oxalic acid used for rust removal and wood bleaching. Per Chapter 29 Note 1(d), products of chemically defined organic compounds dissolved in water are covered by the chapter, so it falls under tariff item 2917.11.00.

Oxalic Acid Dihydrate

Oxalic acid dihydrate is the crystalline form of oxalic acid, used in industrial cleaning and metal polishing. As a separate chemically defined acyclic polycarboxylic acid, it falls under tariff item 2917.11.00 per Chapter 29 Note 1(a).

Oxalic Acid Technical Grade

Technical grade oxalic acid dihydrate with 97-99% purity is used for industrial cleaning and metal treatment. Despite impurities, it remains a chemically defined organic compound per Chapter 29 Note 1(a), which allows for impurities, so it falls under tariff item 2917.11.00.

Oxalic Acid with Anti-Caking Agent

Oxalic acid with anti-caking agent is oxalic acid dihydrate mixed with less than 0.5% silicon dioxide to ensure free-flowing powder. Per Chapter 29 Note 1(f), products with added stabilizers necessary for preservation or transport are covered, so it falls under tariff item 2917.11.00.

Potassium Binoxalate

Potassium binoxalate, also known as potassium hydrogen oxalate, is an acid salt of oxalic acid used in photography and metal finishing. As an acid salt of an organic acid, it is classified under tariff item 2917.11.00 per Chapter 29 Note 5(C)(1), which keeps salts with the parent acid heading.

Sodium Oxalate

Sodium oxalate is the disodium salt of oxalic acid, used in analytical chemistry and textile processing. As an inorganic salt of an organic acid, it is classified under tariff item 2917.11.00 per Chapter 29 Note 5(C)(1), which directs salts to the heading of the parent acid.

2-Ethylhexyl Methyl Adipate

2-Ethylhexyl methyl adipate is an asymmetric diester of adipic acid used in specialty coatings. As an ester of adipic acid, it is classified under tariff item 2917.12.00, which covers all esters of adipic acid.

Adipic Acid/2-Ethylhexyl Alcohol Mixed Ester

Mixed adipic esters optimized for plastisol processing, containing adipic acid esterified with 2-ethylhexyl alcohol and other alcohols. These esters are derivatives of adipic acid and fall under tariff item 2917.12.00, which covers adipic acid, its salts and esters.

Adipic Acid Di-n-hexyl Ester

Adipic acid di-n-hexyl ester used as a fast-fusing plasticizer for PVC flooring. This ester of adipic acid is classified under tariff item 2917.12.00, which includes esters of adipic acid, per Chapter 29 Note 1(a) and subheading note 1.

Adipic Acid Flakes for Nylon Production

Adipic acid flakes in crystalline form, optimized for nylon-6,6 synthesis through reaction with hexamethylenediamine. This is a separate chemically defined organic compound (hexanedioic acid) falling under tariff item 2917.12.00 as adipic acid, per Chapter 29 Note 1(a).

Adipic Acid (Hexanedioic Acid)

Adipic acid (hexanedioic acid) as a white crystalline dicarboxylic acid, primarily for nylon production. It is a separate chemically defined organic compound within Chapter 29, classified under tariff item 2917.12.00 for adipic acid.

Adipic Acid Mixed Esters

Mixed esters of adipic acid with different alcohols (e.g., butyl/hexyl) used in specialty lubricants. These esters are classified under tariff item 2917.12.00, which covers adipic acid esters, per Chapter 29 Note 1(a).

Bis(2-ethylhexyl) Adipate (DEHA)

Bis(2-ethylhexyl) adipate (DEHA) is a primary plasticizer for PVC requiring low-temperature flexibility. This ester of adipic acid is classified under tariff item 2917.12.00, which covers adipic acid esters.

Bis(2-ethylhexyl) Adipate (DEHA/BEHA)

Bis(2-ethylhexyl) adipate (DEHA) is a widely used plasticizer for low-temperature PVC applications. As an ester of adipic acid, it is classified under tariff item 2917.12.00, which covers adipic acid, its salts and esters.

Cyclohexyl Adipate

Cyclohexyl adipate is an ester of adipic acid used in high-performance plasticizers requiring thermal stability. Despite the cyclic alcohol component, it is an ester of adipic acid and falls under tariff item 2917.12.00.

Diisononyl Adipate (DINA)

Diisononyl adipate (DINA) is a plasticizer providing excellent permanence and electrical properties for PVC wire and cable insulation. This ester of adipic acid falls under tariff item 2917.12.00, which includes adipic acid esters.

Diisooctyl Adipate (DIOA)

Diisooctyl adipate (DIOA) is a secondary plasticizer for low-temperature performance in plastisols and calendered PVC sheeting. As an ester of adipic acid, it is classified under tariff item 2917.12.00, which covers adipic acid esters.

Dioctyl Adipate (DOA)

Dioctyl adipate (DOA) is an ester of adipic acid used as a plasticizer in PVC formulations for flexible films and coatings. This ester falls under tariff item 2917.12.00, which includes adipic acid, its salts and esters.

Industrial Grade Adipic Acid 99.8%

High-purity adipic acid (99.8%) for polymer manufacturing, specifically nylon 6,6 fibers and resins. This separate chemically defined organic compound qualifies under tariff item 2917.12.00, as it meets Chapter 29 Note 1(a) for pure compounds.

Pharmaceutical Grade Adipic Acid USP

Ultra-pure adipic acid meeting USP standards, used as an excipient in pharmaceuticals. Despite its pharmaceutical grade, it remains a separate chemically defined organic compound under Chapter 29, classified under tariff item 2917.12.00 for adipic acid.

Purified Adipic Acid for Polyurethane

Refined adipic acid used as a diol component in polyurethane elastomers and coatings. This is a separate chemically defined organic compound, classified under tariff item 2917.12.00 as adipic acid, per Chapter 29 Note 1(a).

Azelaic Acid Diethyl Ester

Diethyl azelate is a diester of azelaic acid, a colorless liquid with a fruity odor. It is used in the synthesis of low molecular weight polyesters and as a cross-linking agent. Under Chapter 29 Note 5(A), esters of acid-function organic compounds are classified with the parent acid, so this falls under tariff item 2917.13.00.

Azelaic Acid Monosodium Salt

Sodium azelate is the monosodium salt of azelaic acid, a white powder used in biodegradable polymers and corrosion inhibitors. Chapter 29 Note 5(C)(1) classifies inorganic salts of organic compounds with the parent organic compound, placing it under tariff item 2917.13.00.

Azelaic Acid Powder

Azelaic acid in crystalline powder form is a pure dicarboxylic acid with nine carbon atoms, used in cosmetics for acne treatment and rosacea. It is explicitly named in tariff item 2917.13.00, and Chapter 29 Note 1(a) covers separate chemically defined organic compounds.

Bio-Based Sebacic Acid Granules

Bio-based sebacic acid granules are renewable sebacic acid derived from castor oil, granulated for metering in biodegradable polymer production. The bio-origin does not affect classification, and it falls under tariff item 2917.13.00 as sebacic acid.

Dibutyl Sebacate (DBS)

Dibutyl sebacate is an ester of sebacic acid used as a plasticizer for nitrocellulose lacquers and vinyl resins, offering good low-temperature performance. Per Chapter 29 Note 5(A), esters are classified with the parent acid, so this falls under tariff item 2917.13.00.

Dimethyl Azelate (DMA)

Dimethyl azelate is the dimethyl ester of azelaic acid, a colorless liquid used as a solvent and intermediate in polymer synthesis. Chapter 29 Note 5(A) classifies esters with the parent acid, placing it under tariff item 2917.13.00.

Dioctyl Sebacate (DOS)

Dioctyl sebacate, also known as di(2-ethylhexyl) sebacate, is an ester of sebacic acid used as a plasticizer in PVC for low-temperature flexibility. Under Chapter 29 Note 5(A), it is classified with the parent acid, sebacic acid, in tariff item 2917.13.00.

Distilled Sebacic Acid from Castor Oil

Distilled sebacic acid from castor oil is obtained via oxidation and distillation of ricinoleic acid, used in lubricants. It is a separate chemically defined compound, classified under tariff item 2917.13.00 as sebacic acid.

High Purity Sebacic Acid Powder

High purity sebacic acid powder is micronized sebacic acid with purity greater than 99.8%, used in precision applications like hot-melt adhesives. It is explicitly named in tariff item 2917.13.00, and Chapter 29 Note 1(a) covers separate chemically defined organic compounds.

Industrial Sebacic Acid Flakes

Industrial sebacic acid flakes are produced in flake form for easier handling in polyamide resin synthesis, derived from castor oil oxidation. It is a separate chemically defined compound, classified under tariff item 2917.13.00 as sebacic acid.

Pharmaceutical Grade Sebacic Acid USP

Pharmaceutical grade sebacic acid USP is ultra-pure sebacic acid meeting USP standards for use in drug coatings and polymer excipients. It is classified under tariff item 2917.13.00 as sebacic acid, not as a pharmaceutical product, per Chapter 29 Note 1(a).

Polysebacic Acid Polymer

Polysebacic acid is a low molecular weight oligomer of sebacic acid, used in drug delivery systems. Although a polymer, it is classified as a sebacic acid derivative under tariff item 2917.13.00 when it does not meet polymer definitions in other chapters, per Chapter 29 Note 1(a).

Sebacic Acid Calcium Salt

Calcium sebacate is the calcium salt of sebacic acid, used as a lubricant in PVC processing and corrosion inhibitor in coatings. Chapter 29 Note 5(C)(1) classifies inorganic salts of organic compounds with the parent acid, placing it under tariff item 2917.13.00.

Sebacic Acid Flakes

Sebacic acid in flake form is a 10-carbon dicarboxylic acid derived from castor oil, used in nylon 610 production and lubricants. It is explicitly named in tariff item 2917.13.00, and Chapter 29 Note 1(a) covers separate chemically defined organic compounds.