HS Code for Oxalic acid

Oxalic acid is classified under HS code 2917.11. This code is found in Chapter 29, which covers organic chemicals. Specifically, heading 2917 covers acyclic polycarboxylic acids, their anhydrides, halides, peroxides, and peroxyacids. Oxalic acid (ethanedioic acid) is the simplest dicarboxylic acid, with the chemical formula C2H2O4. The classification is based strictly on the chemical structure of the molecule. Under the Harmonized System, organic chemicals are categorized by their functional groups and the saturation of their carbon chains. As a saturated acyclic polycarboxylic acid, oxalic acid is explicitly named in the first subheading of 2917. This code also includes the salts and esters of oxalic acid, such as sodium oxalate or diethyl oxalate, provided they are not more specifically described elsewhere in the nomenclature.

Products Included

• Oxalic acid dihydrate
• Anhydrous oxalic acid
• Ammonium oxalate
• Sodium oxalate
• Potassium oxalate
• Diethyl oxalate and other esters

Common Misclassification

Oxalic acid is sometimes misclassified under 2811.19, which covers other inorganic acids. However, since oxalic acid contains carbon and is an organic acid, it must stay within Chapter 29. Another common error occurs when oxalic acid is part of a prepared cleaning or bleaching product. If the substance is a mixture used for rust removal or wood bleaching, it may be classified under 3824.99 (chemical products not elsewhere specified) or 3402.90 (cleaning preparations), depending on the concentration and other ingredients.

FAQ

What is the HS code for oxalic acid?

The specific HS code for oxalic acid, its salts, and its esters is 2917.11.

Does this code include wood bleaches containing oxalic acid?

No, if the product is a prepared mixture sold as a wood bleach, it is usually classified in Chapter 34 or 38. Code 2917.11 is reserved for the pure chemical or its defined salts/esters.