Analysis
Subheading 2918.13 covers salts and esters of tartaric acid, within heading 2918. The first six digits are shared by every country that uses the Harmonized System, so this part of the code is the same in the US, UK and EU schedules; the 4 US tariff lines below it are national.
3 of its 4 lines with a percentage rate are duty-free at the general rate (75%) and 1 are dutiable, from duty-free up to 4.4%. The median line pays duty-free.
The US splits it as follows: 2918.13.10 for potassium antimony tartrate (Tartar emetic) (duty-free), 2918.13.20 for potassium bitartrate (Cream of tartar) (duty-free), 2918.13.30 for potassium sodium tartrate (Rochelle salts) (duty-free) and 2918.13.50 for salts and esters of tartaric acid: other (4.4%).
By Census's concordance, most of its statistical lines are made by All Other Basic Organic Chemical Manufacturing (325199). Those are the NAICS industries a US producer of these goods would report under.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 2918.13.10 | Potassium antimony tartrate (Tartar emetic) | Free |
| 2918.13.20 | Potassium bitartrate (Cream of tartar) | Free |
| 2918.13.30 | Potassium sodium tartrate (Rochelle salts) | Free |
| 2918.13.50 | Salts and esters of tartaric acid: other | 4.4% |