2918.13.20.00 - Potassium bitartrate (Cream of tartar)

This HTS category, 2918.13.20.00, specifically classifies Potassium bitartrate, commonly known as Cream of tartar. This substance is a salt of tartaric acid and is characterized by its acidic nature and its application primarily as a leavening agent in baking, as well as in various industrial and pharmaceutical uses. It is a key component in the preparation of baking powder and is also utilized in metal cleaning and electroplating.

Within the broader classification of "Salts and esters of tartaric acid," this category is distinguished from its siblings by its precise chemical composition. Potassium antimony tartrate (2918.13.10.00) is a different salt, containing antimony, which imparts distinct properties and uses, notably in medicinal applications. Similarly, Potassium sodium tartrate (2918.13.30.00), also known as Rochelle salts, possesses both potassium and sodium ions, resulting in different solubility and functional characteristics, particularly its use as a laxative and in some analytical chemistry applications. The "Other" category (2918.13.50.00) serves as a residual classification for any other tartaric acid salts or esters not otherwise specified.

As this HTS code represents a leaf node, there are no further subcategories within this specific classification. Therefore, the focus remains on clearly identifying Potassium bitartrate and its primary distinguishing features to ensure accurate customs classification against other related tartaric acid derivatives.