HS Code for Chromic acid

Chromic acid, chemically known as chromium trioxide, is classified under HS code 2819.10. Chapter 28 covers inorganic chemicals and precious metal compounds. Heading 2819 is designated for chromium oxides and hydroxides. Within this heading, 2819.10 specifically identifies chromium trioxide. Although often referred to commercially as \"chromic acid,\" especially when in aqueous solution or flake form for electroplating, the Harmonized System classifies it based on its chemical structure as an oxide. The classification is precise because 2819.10 is a specific subheading for the trioxide (CrO3), which is the anhydride of true chromic acid (H2CrO4). This code is used for technical, industrial, and reagent grades of the chemical.

Products Included

• Chromium trioxide flakes
• Chromic anhydride
• Chromic acid flakes (Technical grade)
• Aqueous solutions of chromium trioxide
• Chromium (VI) oxide

Common Misclassification

Chromic acid is often misclassified under 2824, which covers lead oxides, or 2833.29, which covers other sulfates including chromium sulfates (often used in tanning). Another common error is 3817, which involves mixed alkylbenzenes, or 3824, for prepared binders for foundry molds. Because \"chromic acid\" is a term used for various mixtures in the plating industry, users sometimes try to classify it as a prepared chemical mixture under 3824, but if the product is essentially chromium trioxide, 2819.10 is the legally required code.

FAQ

What is the HS code for chromic acid?

The HS code for chromic acid (chromium trioxide) is 2819.10.

Is liquid chromic acid classified differently than flakes?

No, both the solid flake form and the aqueous solution of chromium trioxide are typically classified under 2819.10, as the solution is simply the chemical dissolved in water without other additives.