# United States tariff lines under HS 3821.00

> The United States tariff splits HS 3821.00 (prepared culture media for the development or maintenance of micro-organisms (including viruses and the like) or of plant, human or animal cells, prepared culture media for the development or maintenance of micro-organisms (including viruses and the like) or of plant, human or animal cells) into 2 national lines: 3821.00.00.10 (viral transport media) and 3821.00.00.90 (other). The general (MFN) duty is 5% on all 2 lines.

Source: https://border.bot/countries/united-states/hs-codes/382100
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 38](https://border.bot/countries/united-states/hs-codes/38) / [3821.00](https://border.bot/countries/united-states/hs-codes/382100)

## Key facts

- HS subheading: [3821.00](https://border.bot/hs-codes/382100)
- Duty (MFN): 5%
- National lines: 2
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 38: Miscellaneous chemical products

## United States lines under 3821.00

The United States tariff splits HS 3821.00 (prepared culture media for the development or maintenance of micro-organisms (including viruses and the like) or of plant, human or animal cells, prepared culture media for the development or maintenance of micro-organisms (including viruses and the like) or of plant, human or animal cells) into 2 national lines: 3821.00.00.10 (viral transport media) and 3821.00.00.90 (other).

The general (MFN) duty is 5% on all 2 lines.

- [3821.00.00.10](https://border.bot/countries/united-states/hs-codes/3821000010) Viral transport media. Duty (MFN): 5%
- [3821.00.00.90](https://border.bot/countries/united-states/hs-codes/3821000090) Other. Duty (MFN): 5%

## In other countries

No other national tariff on border.bot has live lines under 3821.00 yet.

- [The Harmonized System text for 3821.00](https://border.bot/hs-codes/382100)

- Previous subheading: [3820.00](https://border.bot/countries/united-states/hs-codes/382000) Antifreezing preparations and prepared deicing fluids
- Next subheading: [3822.11](https://border.bot/countries/united-states/hs-codes/382211) Diagnostic or laboratory reagents on a backing, prepared diagnostic or laboratory reagents whether or not on a backing, whether or not put up in the form of kits, other than those of heading 3006; certified reference materials

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 3821.00?

The United States tariff splits HS 3821.00 (prepared culture media for the development or maintenance of micro-organisms (including viruses and the like) or of plant, human or animal cells, prepared culture media for the development or maintenance of micro-organisms (including viruses and the like) or of plant, human or animal cells) into 2 national lines: 3821.00.00.10 (viral transport media) and 3821.00.00.90 (other).

### What is the duty on HS 3821.00 in the United States?

The general (MFN) duty is 5% on all 2 lines.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/382100.json