Harmonized System (HS) codes are standardized international system used for classifying internationally traded products. It is a six digit code.
First two digits: chapter the products are classified in
Next two digits: heading within the chapter
Final two digits: subheading within the chapter
Here is how to read the six digit HS code
3401.11 is the HS code for toilet soap bars.
34 identifies the chapter-Soap, organic surface-active agents, washing, lubricating, polishing or scouring preparations, artificial or prepared waxes, candles and similar articles, modelling pastes, dental waxes and dental preparations with a basis of plaster
3401 identifies the heading- Soap, organic surface-active preparations used as soap, skin washing, in bars, cakes, moulded pieces, shapes, liquid or cream, containing soap or not, for retail, paper, wadding, felt and nonwovens, impregnated, coated or covered with soap or detergent
Soap and organic surface-active products; in the form of bars; cakes; moulded shapes; and paper; wadding; felt and nonwovens; impregnated; coated or covered with soap or detergent; for toilet use (including medicated products)
The Harmonized Tariff Schedule (HTS) is the primary resource for determining customs duty classifications for goods imported into the United States. The HTS codes are 7-10 digits long with the first six digits being the HS code.
For example, 3401.11.10.00 is the HTS code for castile soap. The first six digits are the HS code (described in the above example) and the next two are the US subheading for the HS code and the last two are the statistical suffix.