# United States tariff lines under HS 3812.39

> The United States tariff splits HS 3812.39 (anti-oxidising preparations and other compound stabilisers for rubber or plastics: Other) into 5 national lines: 3812.39.20.00 (mixtures of N,N'-diaryl-p-phenylenediamines), 3812.39.30.00 (master batches of poly[nitrilomethanetetraaryl- nitrilo[2,4,6- tris(1-methylethyl)-1,3- phenylene]]-2,6-bis(1-methylethyl)phenyl]-ω- [[[[2,6-bis(1-methylethyl)phenyl]amino]- methylene]amino]carbodiimide or 2,4-diisocyanate-1,3,5-tris(1-methylethyl)- benzene homopolymer with polyethylene, polyethylene terephthalate, or thermoplastic polyurethanes;Master batches of 3-(2H-benzotriazol-2-yl)-5- (tert-butyl)-4-hydroxybenzenepropanoic acid, C7-C9 branched or linear alkyl esters; andMaster batches of α-[3-[3-(2H-benzotriazol-2- yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1- oxopropyl-ω-[3-[3-(2H-benzotriazol-2-yl)-5- (1,1-dimeth…), 3812.39.60.00 (other), 3812.39.70.00 (bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate) and 1 other. The general (MFN) duty differs by line: 6.5% on 3812.39.20.00, free on 3812.39.30.00, 6.5% on 3812.39.60.00, free on 3812.39.70.00 and 5% on 3812.39.90.00.

Source: https://border.bot/countries/united-states/hs-codes/381239
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) / [3812.39](https://border.bot/countries/united-states/hs-codes/381239)

## Key facts

- HS subheading: [3812.39](https://border.bot/hs-codes/381239)
- National lines: 5
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 38: Miscellaneous chemical products

## United States lines under 3812.39

The United States tariff splits HS 3812.39 (anti-oxidising preparations and other compound stabilisers for rubber or plastics: Other) into 5 national lines: 3812.39.20.00 (mixtures of N,N'-diaryl-p-phenylenediamines), 3812.39.30.00 (master batches of poly[nitrilomethanetetraaryl- nitrilo[2,4,6- tris(1-methylethyl)-1,3- phenylene]]-2,6-bis(1-methylethyl)phenyl]-ω- [[[[2,6-bis(1-methylethyl)phenyl]amino]- methylene]amino]carbodiimide or 2,4-diisocyanate-1,3,5-tris(1-methylethyl)- benzene homopolymer with polyethylene, polyethylene terephthalate, or thermoplastic polyurethanes;Master batches of 3-(2H-benzotriazol-2-yl)-5- (tert-butyl)-4-hydroxybenzenepropanoic acid, C7-C9 branched or linear alkyl esters; andMaster batches of α-[3-[3-(2H-benzotriazol-2- yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1- oxopropyl-ω-[3-[3-(2H-benzotriazol-2-yl)-5- (1,1-dimeth…), 3812.39.60.00 (other), 3812.39.70.00 (bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate) and 1 other.

The general (MFN) duty differs by line: 6.5% on 3812.39.20.00, free on 3812.39.30.00, 6.5% on 3812.39.60.00, free on 3812.39.70.00 and 5% on 3812.39.90.00.

- [3812.39.20.00](https://border.bot/countries/united-states/hs-codes/3812392000) Anti-oxidizing preparations and other compound stabilizers for rubber or plastics, Other, Containing any aromatic or modified aromatic antioxidant or other stabilizer, Mixtures of N,N'-diaryl-p-phenylenediamines. Duty (MFN): 6.5%
- [3812.39.30.00](https://border.bot/countries/united-states/hs-codes/3812393000) Anti-oxidizing preparations and other compound stabilizers for rubber or plastics, Other, Containing any aromatic or modified aromatic antioxidant or other stabilizer, Master batches of poly[nitrilomethanetetraaryl- nitrilo[2,4,6- tris(1-methylethyl)-1,3- phenylene]]-2,6-bis(1-methylethyl)phenyl]-ω- [[[[2,6-bis(1-methylethyl)phenyl]amino]- methylene]amino]carbodiimide or 2,4-diisocyanate-1,3,5-tris(1-methylethyl)- benzene homopolymer with polyethylene, polyethylene terephthalate, or thermoplastic polyurethanes;Master batches of 3-(2H-benzotriazol-2-yl)-5- (tert-butyl)-4-hydroxybenzenepropanoic acid, C7-C9 branched or linear alkyl esters; andMaster batches of α-[3-[3-(2H-benzotriazol-2- yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1- oxopropyl-ω-[3-[3-(2H-benzotriazol-2-yl)-5- (1,1-dimeth…. Duty (MFN): free
- [3812.39.60.00](https://border.bot/countries/united-states/hs-codes/3812396000) Anti-oxidizing preparations and other compound stabilizers for rubber or plastics, Other, Containing any aromatic or modified aromatic antioxidant or other stabilizer, Other. Duty (MFN): 6.5%
- [3812.39.70.00](https://border.bot/countries/united-states/hs-codes/3812397000) Anti-oxidizing preparations and other compound stabilizers for rubber or plastics, Other, Other, Bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate. Duty (MFN): free
- [3812.39.90.00](https://border.bot/countries/united-states/hs-codes/3812399000) Anti-oxidizing preparations and other compound stabilizers for rubber or plastics, Other, Other, Other. Duty (MFN): 5%

## In other countries

No other national tariff on border.bot has live lines under 3812.39 yet.

- [The Harmonized System text for 3812.39](https://border.bot/hs-codes/381239)

- Previous subheading: [3812.31](https://border.bot/countries/united-states/hs-codes/381231) Prepared rubber accelerators; compound plasticizers for rubber or plastics, not elsewhere specified or included; antioxidizing preparations and other compound stabilizers for rubber or plastics
- Next subheading: [3813.00](https://border.bot/countries/united-states/hs-codes/381300) Preparations and charges for fire extinguishers; charged fire-extinguishing grenades

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 3812.39?

The United States tariff splits HS 3812.39 (anti-oxidising preparations and other compound stabilisers for rubber or plastics: Other) into 5 national lines: 3812.39.20.00 (mixtures of N,N'-diaryl-p-phenylenediamines), 3812.39.30.00 (master batches of poly[nitrilomethanetetraaryl- nitrilo[2,4,6- tris(1-methylethyl)-1,3- phenylene]]-2,6-bis(1-methylethyl)phenyl]-ω- [[[[2,6-bis(1-methylethyl)phenyl]amino]- methylene]amino]carbodiimide or 2,4-diisocyanate-1,3,5-tris(1-methylethyl)- benzene homopolymer with polyethylene, polyethylene terephthalate, or thermoplastic polyurethanes;Master batches of 3-(2H-benzotriazol-2-yl)-5- (tert-butyl)-4-hydroxybenzenepropanoic acid, C7-C9 branched or linear alkyl esters; andMaster batches of α-[3-[3-(2H-benzotriazol-2- yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1- oxopropyl-ω-[3-[3-(2H-benzotriazol-2-yl)-5- (1,1-dimeth…), 3812.39.60.00 (other), 3812.39.70.00 (bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate) and 1 other.

### What is the duty on HS 3812.39 in the United States?

The general (MFN) duty differs by line: 6.5% on 3812.39.20.00, free on 3812.39.30.00, 6.5% on 3812.39.60.00, free on 3812.39.70.00 and 5% on 3812.39.90.00.

## 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/381239.json