# United States tariff line 2925.29.70.00: Tetramethylguanidine

> In the United States tariff, line 2925.29.70.00 covers imines and their derivatives; salts thereof, tetramethylguanidine. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2925.29 in heading 29.25 (chapter 29).

Source: https://border.bot/countries/united-states/hs-codes/2925297000
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 29](https://border.bot/countries/united-states/hs-codes/29) / [2925.29](https://border.bot/countries/united-states/hs-codes/292529) / [2925.29.70.00](https://border.bot/countries/united-states/hs-codes/2925297000)

## Key facts

- Tariff line: 2925.29.70.00
- Covers: Imines and their derivatives; salts thereof, tetramethylguanidine
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2925.29](https://border.bot/hs-codes/292529)

## What this line covers

In the United States tariff, line 2925.29.70.00 covers imines and their derivatives; salts thereof, tetramethylguanidine.

Its legal text is “Tetramethylguanidine”, read under “Imines and their derivatives; salts thereof”, “Other” and “Other”.

## How it is structured

It falls under HS subheading 2925.29 in heading 29.25 (chapter 29). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 29: Organic chemicals
- Heading 29.25: Carboxyimide-function compounds (including saccharin and its salts) and imine-function compounds
- Subheading 2925.29: Imines and their derivatives; salts thereof
- Within the subheading: Other
- Within the subheading: Other
- Line 2925.29.70.00: Tetramethylguanidine

## Duty

Goods under this line enter free of general (MFN) duty.

## In other countries

No other national tariff on border.bot has live lines under 2925.29 yet.

- [The Harmonized System text for 2925.29](https://border.bot/hs-codes/292529)

## Other lines under 2925.29

- [2925.29.10.00](https://border.bot/countries/united-states/hs-codes/2925291000) N'-(4-Chloro-o-tolyl)-N,N- diemthylformamidine; Bunamidine hydrochloride; and Pentamidine
- [2925.29.18.00](https://border.bot/countries/united-states/hs-codes/2925291800) N,N'-Diphenylguanidine; 3-Dimethyl amino methyleneiminophenol hydrochloride; 1,3-Di-o-tolylguanidine; andN,N-Dimethyl-N'-[3-[[(methylamino) carbonyl]- oxy] phenyl] methanimidamide monohydro- chloride
- [2925.29.20.00](https://border.bot/countries/united-states/hs-codes/2925292000) Drugs
- [2925.29.60.00](https://border.bot/countries/united-states/hs-codes/2925296000) Other
- [2925.29.90.00](https://border.bot/countries/united-states/hs-codes/2925299000) Other

- Previous line: [2925.29.60.00](https://border.bot/countries/united-states/hs-codes/2925296000) Other
- Next line: [2925.29.90.00](https://border.bot/countries/united-states/hs-codes/2925299000) Other

## Frequently asked questions

### What does tariff line 2925.29.70.00 cover in the United States tariff?

In the United States tariff, line 2925.29.70.00 covers imines and their derivatives; salts thereof, tetramethylguanidine.

### What is the general (MFN) duty on 2925.29.70.00 in the United States?

Goods under this line enter free of general (MFN) duty.

## 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/2925297000.json