Key facts
- HS code
- 3910.00
- Covers
- Silicones in primary forms
- Edition
- HS2022
- Duty in the United States
- See its 1 line
Summary
HS code 3910.00 covers silicones in primary forms. It sits in heading 39.10 (silicones in primary forms) in chapter 39 (plastics and articles thereof). It is the only subheading of heading 39.10, so every good of the heading is classified here. National tariff lines under 3910.00 are live on border.bot for the United States (1 line, also used by 1 other country).
What this code covers
HS code 3910.00 covers silicones in primary forms.
The legal text of the subheading is “Silicones in primary forms”, in HS2022.
What it doesn’t cover
It is the only subheading of heading 39.10, so every good of the heading is classified here.
How it is structured
3910.00 is a six-digit subheading. Its first two digits, 39, are the chapter; the first four, 3910, are heading 39.10; the last two, 00, identify the subheading within the heading.
Countries add their own digits after these six for their national tariff lines.
- Chapter 39
- Plastics and articles thereof
- Heading 39.10
- Silicones in primary forms
- Subheading 3910.00
- Silicones in primary forms
In other countries
National tariff lines under 3910.00 are live on border.bot for the United States (1 line, also used by 1 other country).
- United States1 line, used by 1 other country
Frequently asked questions
What does HS code 3910.00 cover?
HS code 3910.00 covers silicones in primary forms.
Which heading and chapter is HS code 3910.00 in?
HS code 3910.00 is in heading 39.10 (silicones in primary forms) in chapter 39 (plastics and articles thereof).
Where are goods of heading 39.10 classified when 3910.00 doesn’t fit?
3910.00 is the only subheading of heading 39.10, so every good of the heading is classified there.
Which countries’ tariffs list national lines under HS code 3910.00?
National tariff lines under 3910.00 are live on border.bot for the United States (1 line, also used by 1 other country).
Sources and updates
The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.
This page was last updated on 11 October 2026.
Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.