Analysis
HTS 3811.19.00 covers antiknock preparations: other under heading 3811 (antiknock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers…).
Within this group the rate runs from duty-free to 6.5%. Compared with 3811.11.50 (based on lead compounds: other), which pays duty-free, a misclassification either way moves the duty by 6.5 percentage points.
The general duty rate is 6.5% of the customs value, which is above most the rates in chapter 38 (86th percentile of 179 lines with an ad valorem rate). On a shipment valued at $10,000 that is $650 in duty before any Chapter 99 additions or preference claims.
Goods that qualify under GSP, the Australia FTA, the Bahrain FTA, the Chile FTA, the Colombia TPA, and 12 others can enter duty-free instead of paying 6.5%. It is also eligible under GSP, the developing-country programme, which Congress has to renew; check whether GSP is in force on the entry date.
Census statistics map these goods to NAICS 325998 (All Other Miscellaneous Chemical Product and Preparation Manufacturing), an industry of 1,319 US establishments employing 42,583 people. That concordance is how imports of this line are compared with US output.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 3811.11.10 | Based on tetraethyl lead or on a mixture of tetraethyl lead and tetramethyl lead | Free |
| 3811.11.50 | Based on lead compounds: other | Free |
| 3811.21.00 | Containing petroleum oils or oils obtained from bituminous minerals | 6.5% |
| 3811.29.00 | Additives for lubricating oils: other | 6.5% |
| 3811.90.00 | Antiknock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including gasoline) or for other liquids used for the same purposes as mineral oils: other | 6.5% |