U.S. imports of Lead-Based Antiknock Preparations (HS 381111) totaled $1.4M in August 2026, imported from 4 countries.
Importers of Lead-Based Antiknock Preparations paid $139K in duties in August 2026, an average duty rate of 10.00% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Lead-Based Antiknock Preparations imports of $1.4M in August 2026 ran 11% below the year-to-date monthly average of $1.6M.
Last updated: August 2026 dataLead-based antiknock preparations — most notably those derived from tetraethyl lead (TEL) — are subject to stringent environmental and regulatory scrutiny given the well-documented toxicity of organolead compounds. The US schedule distinguishes tetraethyl lead formulations (3811111000) from other lead-compound-based antiknock preparations (3811115000). The United Kingdom and Germany are the leading import sources, reflecting the legacy industrial base for these compounds, with the United Arab Emirates also appearing as a supplier. Demand in the US is now largely confined to aviation gasoline (avgas) and certain specialty applications, as leaded automotive fuel has been phased out.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
11 import shipments a month
Yes, but their use is highly restricted. Leaded fuel for on-road vehicles is prohibited under the Clean Air Act, but tetraethyl lead formulations remain in use for certain aviation gasolines (avgas) and specialty applications. Importers must ensure end-use compliance with EPA regulations and should verify that the specific formulation and intended application are permissible before importation.
Line 3811111000 covers antiknock preparations specifically based on tetraethyl lead and closely related organolead compounds, while 3811115000 captures all other lead-compound-based antiknock preparations not elsewhere specified. The distinction matters for classification accuracy and for tracking regulatory compliance, as different organolead chemistries may carry different handling and reporting obligations.
Subheading 4 of 5 in heading 3811
Subheading 381111 · $1.4M of $81.7M
ImportsExports
Imports
$1.4MYoY · free account
Exports
$122KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $15.8M of Lead-Based Antiknock Preparations and exported $3.9M.
Through August 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 3811111000 | Antiknock Prep, Based on Tetraethyl Lead Etc | $1.4M | 10.00% | 100.00% | $137K |
| 3811115000 | Antiknock Prep Based on Lead Compounds, NESOI | $25K | 10.00% | 100.00% | $3K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 3811110000 | Antiknock Preparations, Based on Lead Compounds | $122K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
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Imports · August 2026
origin
United Kingdom and Germany together supply 100% of it.
customs district
destination
entry
rate provision · imports
duty collected equals 10.00% of imports for consumption.