# United States tariff line 2918.13.30.00: Potassium sodium tartrate (Rochelle salts)

> In the United States tariff, line 2918.13.30.00 covers carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives, salts and esters of tartaric acid, potassium sodium tartrate (Rochelle salts). Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2918.13 in heading 29.18 (chapter 29).

Source: https://border.bot/countries/united-states/hs-codes/2918133000
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) / [2918.13](https://border.bot/countries/united-states/hs-codes/291813) / [2918.13.30.00](https://border.bot/countries/united-states/hs-codes/2918133000)

## Key facts

- Tariff line: 2918.13.30.00
- Covers: Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives, salts and esters of tartaric acid, potassium sodium tartrate (Rochelle salts)
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2918.13](https://border.bot/hs-codes/291813)

## What this line covers

In the United States tariff, line 2918.13.30.00 covers carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives, salts and esters of tartaric acid, potassium sodium tartrate (Rochelle salts).

Its legal text is “Potassium sodium tartrate (Rochelle salts)”, read under “Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives” and “Salts and esters of tartaric acid”.

## How it is structured

It falls under HS subheading 2918.13 in heading 29.18 (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 29.18: Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives
- Subheading 2918.13: Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives
- Within the subheading: Salts and esters of tartaric acid
- Line 2918.13.30.00: Potassium sodium tartrate (Rochelle salts)

## 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 2918.13 yet.

- [The Harmonized System text for 2918.13](https://border.bot/hs-codes/291813)

## Other lines under 2918.13

- [2918.13.10.00](https://border.bot/countries/united-states/hs-codes/2918131000) Potassium antimony tartrate (Tartar emetic)
- [2918.13.20.00](https://border.bot/countries/united-states/hs-codes/2918132000) Potassium bitartrate (Cream of tartar)
- [2918.13.50.00](https://border.bot/countries/united-states/hs-codes/2918135000) Other

- Previous line: [2918.13.20.00](https://border.bot/countries/united-states/hs-codes/2918132000) Potassium bitartrate (Cream of tartar)
- Next line: [2918.13.50.00](https://border.bot/countries/united-states/hs-codes/2918135000) Other

## Frequently asked questions

### What does tariff line 2918.13.30.00 cover in the United States tariff?

In the United States tariff, line 2918.13.30.00 covers carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives, salts and esters of tartaric acid, potassium sodium tartrate (Rochelle salts).

### What is the general (MFN) duty on 2918.13.30.00 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/2918133000.json