# United States tariff lines under HS 3808.99

> The United States tariff splits HS 3808.99 (other: Other) into 5 national lines: 3808.99.04.00 (mixtures of 1,1-bis(4-chlorophenyl)-2,2,2- trichloroethanol (Dicofol) and application adjuvants), 3808.99.08.00 (other), 3808.99.30.00 (formulated biocides based on 2-methyl-4-isothiazolin-3-one, or 2-n-octyl-4-isothiazolin-3-one, or 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, or mixtures of 5-chloro-2-methyl-4- isothiazolin-3-one and 2-methyl-4- isothiazolin-3-one; and Metaldehyde), 3808.99.70.00 (containing an inorganic substance) and 1 other. The general (MFN) duty differs by line: free on 3808.99.04.00, 6.5% on 3808.99.08.00, free on 3808.99.30.00, 5% on 3808.99.70.00 and 5% on 3808.99.95.01.

Source: https://border.bot/countries/united-states/hs-codes/380899
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) / [3808.99](https://border.bot/countries/united-states/hs-codes/380899)

## Key facts

- HS subheading: [3808.99](https://border.bot/hs-codes/380899)
- National lines: 5
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 38: Miscellaneous chemical products

## United States lines under 3808.99

The United States tariff splits HS 3808.99 (other: Other) into 5 national lines: 3808.99.04.00 (mixtures of 1,1-bis(4-chlorophenyl)-2,2,2- trichloroethanol (Dicofol) and application adjuvants), 3808.99.08.00 (other), 3808.99.30.00 (formulated biocides based on 2-methyl-4-isothiazolin-3-one, or 2-n-octyl-4-isothiazolin-3-one, or 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, or mixtures of 5-chloro-2-methyl-4- isothiazolin-3-one and 2-methyl-4- isothiazolin-3-one; and Metaldehyde), 3808.99.70.00 (containing an inorganic substance) and 1 other.

The general (MFN) duty differs by line: free on 3808.99.04.00, 6.5% on 3808.99.08.00, free on 3808.99.30.00, 5% on 3808.99.70.00 and 5% on 3808.99.95.01.

- [3808.99.04.00](https://border.bot/countries/united-states/hs-codes/3808990400) Other, Other, Containing any aromatic or modified aromatic pesticide, Mixtures of 1,1-bis(4-chlorophenyl)-2,2,2- trichloroethanol (Dicofol) and application adjuvants. Duty (MFN): free
- [3808.99.08.00](https://border.bot/countries/united-states/hs-codes/3808990800) Other, Other, Containing any aromatic or modified aromatic pesticide, Other. Duty (MFN): 6.5%
- [3808.99.30.00](https://border.bot/countries/united-states/hs-codes/3808993000) Other, Other, Other, Formulated biocides based on 2-methyl-4-isothiazolin-3-one, or 2-n-octyl-4-isothiazolin-3-one, or 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, or mixtures of 5-chloro-2-methyl-4- isothiazolin-3-one and 2-methyl-4- isothiazolin-3-one; and Metaldehyde. Duty (MFN): free
- [3808.99.70.00](https://border.bot/countries/united-states/hs-codes/3808997000) Other, Other, Other, Other, Containing an inorganic substance. Duty (MFN): 5%
- [3808.99.95.01](https://border.bot/countries/united-states/hs-codes/3808999501) Other, Other, Other, Other, Other. Duty (MFN): 5%

## In other countries

No other national tariff on border.bot has live lines under 3808.99 yet.

- [The Harmonized System text for 3808.99](https://border.bot/hs-codes/380899)

- Previous subheading: [3808.94](https://border.bot/countries/united-states/hs-codes/380894) Disinfectants
- Next subheading: [3809.10](https://border.bot/countries/united-states/hs-codes/380910) Finishing agents, dye carriers to accelerate the dyeing or fixing of dyestuffs and other products and preparations (for example, dressings and mordants), of a kind used in the textile, paper, leather or like industries, not elsewhere specified or included

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 3808.99?

The United States tariff splits HS 3808.99 (other: Other) into 5 national lines: 3808.99.04.00 (mixtures of 1,1-bis(4-chlorophenyl)-2,2,2- trichloroethanol (Dicofol) and application adjuvants), 3808.99.08.00 (other), 3808.99.30.00 (formulated biocides based on 2-methyl-4-isothiazolin-3-one, or 2-n-octyl-4-isothiazolin-3-one, or 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one, or mixtures of 5-chloro-2-methyl-4- isothiazolin-3-one and 2-methyl-4- isothiazolin-3-one; and Metaldehyde), 3808.99.70.00 (containing an inorganic substance) and 1 other.

### What is the duty on HS 3808.99 in the United States?

The general (MFN) duty differs by line: free on 3808.99.04.00, 6.5% on 3808.99.08.00, free on 3808.99.30.00, 5% on 3808.99.70.00 and 5% on 3808.99.95.01.

## 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/380899.json