Product classification
HS code for Rubber accelerators: 3812.10
Rubber accelerators, prepared.
Classification of rubber accelerators under HS 3812.10
Rubber accelerators are classified under HS code 381210, which falls within Chapter 38 for miscellaneous chemical products. The classification logic is based on General Interpretative Rule (GRI) 1 and 6, identifying these substances as prepared chemical additives used specifically in the rubber industry. These products are not single chemically defined elements or compounds, which would typically be classified in Chapter 28 or 29. Instead, they are 'prepared' mixtures or specific chemical substances intended to facilitate the vulcanization process. Vulcanization is the chemical process of cross-linking polymer chains, and accelerators are essential for reducing the time and temperature required for this reaction. By using these accelerators, manufacturers can improve the physical properties of the rubber, such as its elasticity and tensile strength. The classification 381210 specifically targets these prepared accelerators, ensuring they are distinguished from anti-oxidants or other rubber-processing chemicals. The technical nature of these products requires precise documentation of their chemical composition and intended industrial application to ensure correct tariff application during customs clearance.
- Covers
- Thiazole-based accelerators (e.g., MBT, MBTS)
- Sulfenamide accelerators (e.g., CBS, TBBS)
- Thiuram accelerators (e.g., TMTD, TETD)
- Dithiocarbamate accelerators (e.g., ZDEC, ZDBC)
- Guanidine accelerators (e.g., DPG)
- Prepared mixtures of vulcanization accelerators
- Also under 3812.10
- MBTS (Mercaptobenzothiazole disulfide)
- CBS (N-Cyclohexyl-2-benzothiazolesulfenamide)
- TMTD (Tetramethylthiuram disulfide)
- DPG (Diphenylguanidine)
- ZDEC (Zinc diethyldithiocarbamate)
Codes often confused with 3812.10
Common mistake. A frequent point of confusion involves HS codes 2933 and 2934. These codes are reserved for separate chemically defined heterocyclic compounds. If a rubber accelerator is a pure, single chemical compound without any additives or preparations, it may be argued that it belongs in Chapter 29. However, most commercial accelerators are sold as preparations with stabilizers or carriers, which mandates classification under 381210. Additionally, 381239 is often confused with 381210; however, 381239 is specifically for anti-oxidizing preparations and other compound stabilizers for rubber or plastics, which serve a different functional purpose than accelerators.
Top exporters and importers of HS 381210 (the code used for rubber accelerators), 2025
In 2025, the largest exporter of HS 381210 (the code used for rubber accelerators) in UN Comtrade data was China, with 55% of world exports; the largest importer in UN Comtrade data was Thailand, with 12% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 381210, not only rubber accelerators.
Top exporters 2025 · share of world exports
- 1 China $472M 55% of world exports
- 2 Italy $77M 8.9% of world exports
- 3 United States $67M 7.8% of world exports
World total: $861M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Thailand $107M 12% of world imports
- 2 India $94M 11% of world imports
- 3 Indonesia $78M 8.8% of world imports
World total: $880M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for rubber accelerators
Brazil classifies rubber accelerators under NCM 3812.10.00: HS 3812.10 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about rubber accelerators
What is the HS code for Rubber accelerators?
The HS code for Rubber accelerators is 381210 (Rubber accelerators; prepared). The primary HS code for prepared rubber accelerators is 381210.
How do I classify Rubber accelerators for customs?
Rubber accelerators is classified under HS code 381210 — Rubber accelerators; prepared. This is a 6-digit subheading level code.
Does this code include vulcanization agents like sulfur?
No, pure sulfur is classified under heading 2503 or 2802. HS code 381210 is specifically for the chemical accelerators that catalyze the reaction, not the cross-linking agents themselves.
Which countries are the top exporters of rubber accelerators (HS 381210)?
In 2025, the top exporters of HS 381210 (the code used for rubber accelerators) in UN Comtrade data were China ($472M, 55% of world exports), Italy ($77M) and the United States ($67M). World exports came to about $861M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of rubber accelerators (HS 381210)?
In 2025, the top importers of HS 381210 (the code used for rubber accelerators) in UN Comtrade data were Thailand ($107M, 12% of world imports), India ($94M) and Indonesia ($78M). World imports came to about $880M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Rubber accelerators the same in all countries?
The base HS code 381210 for Rubber accelerators is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for rubber accelerators in Brazil?
In Brazil, rubber accelerators (HS 381210) is classified under NCM 3812.10.00.