HS Code for Silicon

Silicon containing by weight less than 99.99% of silicon is classified under HS code 280469. This classification falls within Chapter 28, which covers inorganic chemicals and precious metals. Silicon is treated as a non-metal element under heading 2804. The classification is strictly dependent on the purity level of the silicon. Metallurgical grade silicon, which typically has a purity between 96% and 99%, is the most common product found under this code. It is widely used in the aluminum industry to improve castability and in the chemical industry to produce silicones. The Harmonized System distinguishes between metallurgical grade and electronic grade silicon based on the 99.99% purity threshold. Silicon exceeding this purity level is moved to a different subheading, reflecting its higher value and different industrial application in the semiconductor and solar industries.

Products Included

• Metallurgical grade silicon metal
• Silicon with 98% purity
• Silicon with 99% purity
• Silicon lumps for aluminum alloying
• Crude silicon used in silicone monomer production

Common Misclassification

The most common misclassification occurs with HS code 280461, which is reserved for silicon containing not less than 99.99% of silicon by weight. This high-purity silicon is often called "electronic grade." Another frequent error is confusing silicon metal with silicon wafers; if the silicon has been doped for use in electronics and shaped into discs or wafers, it must be classified under HS code 381800. Additionally, silicon should not be confused with ferrosilicon (720221), which is an alloy containing significant amounts of iron.

FAQ

What is the HS code for Silicon?

The HS code for silicon with less than 99.99% purity is 280469. Silicon with higher purity is 280461.

How is silicon metal distinguished from ferrosilicon in customs?

Silicon metal (280469) is a chemical element with very low iron content, whereas ferrosilicon (720221) is a ferro-alloy containing more than 4% iron by weight.