Heading 2839: Silicates; commercial alkali metal silicates:

From Chapter 28: Chapter 28

HTS Codes (10-Digit)

HTS Code Description General Duty
2839110000
Of sodium Sodium metasilicates
 1.1%
2839190000
Of sodium Other
 1.1%
2839901000
Other Of potassium
 3.1%
2839905000
Other Other
 3.1%