--- title: "2918 – Carboxylic acids with additional oxygen…: Canada tariff & duty rates" description: "Every Canadian tariff classification under HS 2918: Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and…" canonical: "https://www.adhocs.ca/hs-codes/2918" --- # 2918 Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. Up: [HS codes](https://www.adhocs.ca/hs-codes) › [Chapter 29](https://www.adhocs.ca/hs-codes/29) 16 subheadings. Each subheading links to its page, which lists its 10-digit codes, or to its only 10-digit code. ## Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives - [2918.11](https://www.adhocs.ca/hs-codes/2918.11) Lactic acid, its salts and esters - [2918.12.00.00](https://www.adhocs.ca/hs-codes/2918.12.00.00) Tartaric acid - [2918.13.00.00](https://www.adhocs.ca/hs-codes/2918.13.00.00) Salts and esters of tartaric acid - [2918.14.00.00](https://www.adhocs.ca/hs-codes/2918.14.00.00) Citric acid - [2918.15](https://www.adhocs.ca/hs-codes/2918.15) Salts and esters of citric acid - [2918.16](https://www.adhocs.ca/hs-codes/2918.16) Gluconic acid, its salts and esters - [2918.17.00.00](https://www.adhocs.ca/hs-codes/2918.17.00.00) 2,2-Diphenyl-2-hydroxyacetic acid (benzilic acid) - [2918.18.00.00](https://www.adhocs.ca/hs-codes/2918.18.00.00) Chlorobenzilate (ISO) - [2918.19.00.00](https://www.adhocs.ca/hs-codes/2918.19.00.00) Other ## Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives - [2918.21.00.00](https://www.adhocs.ca/hs-codes/2918.21.00.00) Salicylic acid and its salts - [2918.22.00.00](https://www.adhocs.ca/hs-codes/2918.22.00.00) O-Acetylsalicylic acid, its salts and esters - [2918.23.00.00](https://www.adhocs.ca/hs-codes/2918.23.00.00) Other esters of salicylic acid and their salts - [2918.29.00.00](https://www.adhocs.ca/hs-codes/2918.29.00.00) Other - [2918.30.00.00](https://www.adhocs.ca/hs-codes/2918.30.00.00) Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives ## Other - [2918.91.00.00](https://www.adhocs.ca/hs-codes/2918.91.00.00) 2,4,5-T (ISO) (2,4,5-trichlorophenoxyacetic acid), its salts and esters - [2918.99](https://www.adhocs.ca/hs-codes/2918.99) Other ## Other headings in this chapter - Previous: [2917](https://www.adhocs.ca/hs-codes/2917) Polycarboxylic acids, their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. - Next: [2919](https://www.adhocs.ca/hs-codes/2919) Phosphoric esters and their salts, including lactophosphates; their halogenated, sulphonated, nitrated or nitrosated derivatives. [Source: CBSA Customs Tariff](https://www.cbsa-asfc.gc.ca/trade-commerce/tariff-tarif/menu-eng.html).