HS Code for Metal pickling agent

The classification of metal pickling agents under HS code 3810.10 is based on their chemical composition and industrial application. Chapter 38 covers miscellaneous chemical products, and heading 3810 specifically addresses preparations for pickling metal surfaces, as well as fluxes and other auxiliary preparations for soldering, brazing, or welding. Pickling agents are chemical treatments used to remove impurities, such as stains, inorganic contaminants, rust, or scale from ferrous metals, copper, precious metals, and aluminum alloys. These preparations are typically acidic or alkaline solutions. The classification 3810.10 is used when the product is a "preparation"—a mixture of chemicals—rather than a single chemically defined element or compound. If the product were a pure acid, such as hydrochloric acid, it would be classified in Chapter 28. The inclusion of 3810.10 is vital for products that are formulated specifically for the surface treatment of metals prior to further processing like plating or painting. These agents are essential in the steel and metal finishing industries to ensure proper adhesion of coatings.

Products Included

• Acid-based pickling pastes
• Stainless steel pickling solutions
• Rust removal chemical baths
• Surface treatment preparations for welding
• De-scaling chemical mixtures

Common Misclassification

A common error is classifying these under 2806.10 (Hydrochloric acid) or 2807.00 (Sulphuric acid) when the product is a pure chemical. Another misclassification occurs under 3402, which covers surface-active agents and general cleaning preparations that do not have the specific chemical etching or pickling properties required for 3810.10.

FAQ

What is the HS code for metal pickling agent?

The correct HS code for formulated metal pickling preparations is 3810.10.

Are pure acids used for pickling classified here?

No, pure chemically defined acids are classified in Chapter 28. Only preparations (mixtures) intended for pickling fall under 3810.10.