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Masterbatch CBS/N990 Accelerator Blend

60% CBS accelerator dispersed in N990 carbon black masterbatch for direct rubber compounding addition. Retains aromatic accelerator classification under HTS 3812.10.1000 despite carrier.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China6.5%+35.0%41.5%
🇲🇽Mexico6.5%+10.0%16.5%
🇨🇦Canada6.5%+10.0%16.5%
🇩🇪Germany6.5%+10.0%16.5%
🇯🇵Japan6.5%+10.0%16.5%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

3824.99Lower: 15% vs 41.5%

If high carbon black content (>40%)

Carbon black dominant mixtures classify as rubber processing aids.

3812.10Same rate: 41.5%

If non-aromatic accelerator masterbatches

Masterbatches without aromatic components fall under non-aromatic subheading.

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Import Tips & Compliance

• Verify dispersion uniformity via dispersion testing; ensure moisture content below 1%; provide rubber rheometer data

Related Products under HTS 3812.10.10.00

CBS Rubber Accelerator (N-Cyclohexyl-2-benzothiazole sulfenamide)

CBS is a delayed-action sulfenamide rubber accelerator used primarily in tire manufacturing and other rubber products. It contains a modified aromatic benzothiazole structure, qualifying it for classification under HTS 3812.10.1000 as a prepared rubber accelerator with aromatic components.

MBTS Rubber Accelerator (2,2'-Dibenzothiazole disulfide)

MBTS is a versatile rubber accelerator used in the vulcanization of natural and synthetic rubbers, particularly in belts and hoses. Its dibenzothiazole structure contains modified aromatic components, placing it specifically under HTS 3812.10.1000.

NOBS Rubber Accelerator (N-Oxydiethylene-2-benzothiazole sulfenamide)

NOBS is a fast-curing sulfenamide accelerator ideal for thick rubber articles like tires and conveyor belts. The benzothiazole moiety provides the modified aromatic structure required for HTS 3812.10.1000 classification.

TBBS Rubber Accelerator (N-tert-Butyl-2-benzothiazolesulfenamide)

TBBS is a widely used delayed-action accelerator for NR and SR compounds in tire treads and sidewalls. Its aromatic benzothiazole sulfenamide structure mandates classification under HTS 3812.10.1000.

Santocure TBzTD Rubber Accelerator Dispersion

Santocure TBzTD is a tetraisobutylthiuram disulfide accelerator dispersion containing aromatic-modified components for low-sulfur vulcanization systems. The prepared formulation qualifies under HTS 3812.10.1000 due to aromatic accelerator presence.

Benzothiazole-based Pre-Vulcanization Accelerator

Specialty accelerator designed for pre-vulcanization of latex compounds used in dipped goods like gloves and balloons. Contains modified 2-mercaptobenzothiazole derivatives fitting HTS 3812.10.1000 aromatic criteria.