HTS Heading 2918

Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives

All 62 HTS codes under heading 2918 (carboxylic acids), with their duty rates from the 2026 HTS Revision 23. General duty Free to 6.5%.

Every line of heading 2918

  • 2918 Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives.
  • 2918.11 Lactic acid, its salts and esters.
  • 2918.11.10.00 Lactic acid (under: Lactic acid, its salts and esters) (kg): General 5.1%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.
  • 2918.11.51.00 Other (under: Lactic acid, its salts and esters) (kg): General 3.4%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2918.12.00.00 Tartaric acid (under: Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives) (kg): General Free; Special none; Column 2 17%.
  • 2918.13 Salts and esters of tartaric acid.
  • 2918.13.10.00 Potassium antimony tartrate (Tartar emetic) (kg): General Free; Special none; Column 2 4%.
  • 2918.13.20.00 Potassium bitartrate (Cream of tartar) (kg): General Free; Special none; Column 2 11%.
  • 2918.13.30.00 Potassium sodium tartrate (Rochelle salts) (kg): General Free; Special none; Column 2 11.5%.
  • 2918.13.50.00 Other (under: Salts and esters of tartaric acid) (kg): General 4.4%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2918.14.00.00 Citric acid (under: Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives) (kg): General 6%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 39.5%.
  • 2918.15 Salts and esters of citric acid.
  • 2918.15.10.00 Sodium citrate (under: Salts and esters of citric acid) (kg): General 6.5%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 42%.
  • 2918.15.50.00 Other (under: Salts and esters of citric acid) (kg): General 3.7%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2918.16 Gluconic acid, its salts and esters.
  • 2918.16.10.00 Gluconic acid (under: Gluconic acid, its salts and esters) (kg): General 6%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2918.16.50 Other (under: Gluconic acid, its salts and esters): General 3.7%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2918.16.50.10 Sodium gluconate (under: Other) (kg).
  • 2918.16.50.20 Calcium gluconate (under: Other) (kg).
  • 2918.16.50.90 Other (under: Other) (kg).
  • 2918.17.00.01 2,2-Diphenyl-2-hydroxyacetic acid (benzilic acid) (kg): General 5.8%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2918.18.00.00 Chlorobenzilate (ISO) (under: Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.19 Other (under: Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives).
  • 2918.19.11.00 Benzilic acid, methyl ester (under: Aromatic) (kg): General 5.8%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2918.19.12.00 Mandelic acid (under: Phenylglycolic acid (Mandelic acid), its salts and esters) (kg): General Free; Special none; Column 2 15.4¢/kg + 67.5%.
  • 2918.19.15.00 Other (under: Phenylglycolic acid (Mandelic acid), its salts and esters) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO, K,KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 67.5%.
  • 2918.19.20.00 Products described in additional U.S. note 3 to section VI (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.19.31.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.19.60.00 Malic acid (under: Other) (kg): General 4%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2918.19.90.00 Other (under: Other) (kg): General 4%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 25%.
  • 2918.21 Salicylic acid and its salts (under: Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives).
  • 2918.21.10.00 Suitable for medicinal use (under: Salicylic acid and its salts) (kg): General 6.5%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 72%.
  • 2918.21.50.00 Other (under: Salicylic acid and its salts) (kg): General 6.5%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.22 O-Acetylsalicylic acid, its salts and esters.
  • 2918.22.10.00 O-Acetylsalicylic acid (Aspirin) (kg): General 6.5%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 82%.
  • 2918.22.50.00 Salts and esters of O-acetylsalicylic acid (kg): General 6.5%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 47.5%.
  • 2918.23 Other esters of salicylic acid and their salts.
  • 2918.23.10.00 Salol (Phenyl salicylate) suitable for medicinal use (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 45%.
  • 2918.23.20.00 Odoriferous or flavoring compounds (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 58%.
  • 2918.23.30.00 Products described in additional U.S. note 3 to section VI (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.23.50.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.29 Other (under: Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives).
  • 2918.29.04.00 2,3-Cresotic acid; 2-Hydroxybenzoic acid, calcium salt; 1-Hydroxy-2-naphthoic acid; 2-Hydroxy-1-naphthoic acid; 1-Hydroxy-2-naphthoic acid, phenyl ester;α-Resorcylic acid;γ-Resorcylic acid; and 5-Sulfosalicylic acid (kg): General 5.8%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2918.29.06.00 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate) (kg): General 5.8%; Special Free (A+,AU,BH,CL,CO,D,E, IL,JO,KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2918.29.08.00 m-Hydroxybenzoic acid (under: Other) (kg): General Free; Special none; Column 2 15.4¢/kg + 40%.
  • 2918.29.20.00 Gentisic acid; and Hydroxycinnamic acid and its salts (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 48.5%.
  • 2918.29.22.00 p-Hydroxybenzoic acid (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 48.5%.
  • 2918.29.25.00 3-Hydroxy-2-naphthoic acid (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.29.30.00 Gallic acid (under: Other) (kg): General 1%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 2%.
  • 2918.29.39.00 4,4-Bis(4-hydroxyphenyl) pentanoic acid; and 3,5,6-Trichlorosalicylic acid (kg): General Free; Special none; Column 2 15.4¢/kg + 57%.
  • 2918.29.65.00 Products described in additional U.S. note 3 to section VI (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.29.75.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.30 Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives.
  • 2918.30.10.00 1-Formylphenylacetic acid, methyl ester (kg): General 5.8%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2918.30.15.00 2-Chloro-4,5-difluoro-ß-oxobenzenepropanoic acid, ethyl ester; and Ethyl 2-keto-4-phenylbutanoate (kg): General Free; Special none; Column 2 15.4¢/kg + 57%.
  • 2918.30.25 Products described in additional U.S. note 3 to section VI: General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.30.25.10 Methyl 3-oxo-2-phenylbutanoate (methyl alpha-phenylacetoacetate, MAPA) (kg).
  • 2918.30.25.50 Other (under: Products described in additional U.S. note 3 to section VI) (kg).
  • 2918.30.30.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.30.70.00 Dimethyl acetyl succinate; Oxalacetic acid diethyl ester, sodium salt; 4,4,4-Trifluoro-3-oxobutanoic acid, ethyl ester; and 4,4,4-Trifluoro-3-oxobutanoic acid, methyl ester (kg): General Free; Special none; Column 2 25%.
  • 2918.30.90.00 Other (under: Other) (kg): General 3.7%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG); Column 2 25%.
  • 2918.91.00.00 2,4,5-T (ISO) (2,4,5-trichlorophenoxyacetic acid), its salts and esters (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 48.5%.
  • 2918.99 Other (under: Other).
  • 2918.99.05.00 p-Anisic acid; Clofibrate; and 3-Phenoxybenzoic acid (kg): General 5.8%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 40%.
  • 2918.99.06.00 1-Hydroxy-6-octadecyloxy-2-naphthalene- carboxylic acid; and 1-Hydroxy-6-docosyloxy-2-naphthalene- carboxylic acid (kg): General Free; Special none; Column 2 15.4¢/kg + 57%.
  • 2918.99.14.00 2-(4-Chloro-2-methylphenoxy)propionic acid and its salts (kg): General Free; Special none; Column 2 15.4¢/kg + 40.5%.
  • 2918.99.18.00 4-(4-Chloro-2-methylphenoxy) butyric acid;p-Chlorophenoxyacetic acid; and 2-(2,4-Dichlorophenoxy) propionic acid (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 40.5%.
  • 2918.99.20 Other (under: Pesticides): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 48.5%.
  • 2918.99.20.10 2,4-Dichlorophenoxyacetic acid, its salts and esters (kg).
  • 2918.99.20.15 2-Methyl-4-chlorophenoxyacetic acid (kg).
  • 2918.99.20.50 Other (under: Other) (kg).
  • 2918.99.30.00 Drugs (under: Other) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 47.5%.
  • 2918.99.35.00 Odoriferous or flavoring compounds (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 58%.
  • 2918.99.43 Products described in additional U.S. note 3 to section VI: General 6.5%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.99.43.10 2-Methyl-3-phenyloxirane-2-carboxylic acid (P-2-P methyl glycidic acid), its salts and esters (kg).
  • 2918.99.43.50 Other (under: Products described in additional U.S. note 3 to section VI) (kg).
  • 2918.99.47.00 Other (under: Other) (kg): General 6.5%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 15.4¢/kg + 57%.
  • 2918.99.50.00 Other (under: Other) (kg): General 4%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG); Column 2 25%.

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.