HS Code for Tartaric acid salts

Salts and esters of tartaric acid are classified under HS code 2918.13. This classification falls within Chapter 29 (Organic Chemicals), specifically under the heading for carboxylic acids with alcohol functions. While the pure tartaric acid is classified in 2918.12, its derivatives—formed by replacing the acidic hydrogen with a metal ion (to form a salt) or an organic radical (to form an ester)—are grouped together in this subheading. These compounds are chemically distinct from the parent acid and have diverse applications. For instance, potassium bitartrate (cream of tartar) is a common leavening agent, while Rochelle salt (potassium sodium tartrate) is used in silvering mirrors and as a laxative. Esters like diethyl tartrate are used in organic synthesis and as chiral building blocks. The classification under 2918.13 ensures that these derivatives are tracked separately from the base acid for regulatory and trade purposes.

Products Included

• Potassium bitartrate (Cream of Tartar)
• Potassium sodium tartrate (Rochelle salt)
• Antimony potassium tartrate (Tartar emetic)
• Diethyl tartrate
• Dimethyl tartrate
• Calcium tartrate

Common Misclassification

The most frequent misclassification occurs with tartaric acid itself, which belongs under HS code 2918.12. Importers often fail to distinguish between the free acid and its salt forms. Additionally, these salts may be confused with other organic acid salts, such as citrates (2918.15) or lactates (2918.11). It is also important not to confuse these with inorganic salts found in Chapter 28, as these are specifically organic derivatives of the carboxylic acid group.

FAQ

What is the HS code for cream of tartar?

Cream of tartar, or potassium bitartrate, is a salt of tartaric acid and is classified under HS code 2918.13.

What is the HS code for Rochelle salt?

Rochelle salt (potassium sodium tartrate) is classified under HS code 2918.13 as a salt of tartaric acid.