N-(Oxydiethylene)benzothiazole-2-sulfenamide (NOBS) Crystals
NOBS is a delayed-action sulfenamide accelerator containing the specified benzothiazole ring system, explicitly named in HTS 2934.20.1500. It provides scorch safety and fast curing in rubber compounds, especially for thick sections.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If supplied as part of compounded accelerator masterbatch
Rubber accelerator mixtures specifically provided for in 3812 supersede pure chemical classification
If amine functionality considered principal characteristic
Carboxamide-function compounds could apply if heterocyclic structure secondary to sulfenamide group
If technical grade with additives for handling stability
Preparations with functional additives exceeding Chapter 29 purity standards classified as chemical mixtures
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Submit manufacturer's specification sheet confirming CAS 102-77-8 and minimum 95% purity for proper Chapter 29 classification
• Include rubber industry end-use letters to prevent misclassification as general chemical preparations
• Ensure DOT-compliant packaging for this combustible solid (UN3077) with proper hazard labeling
Related Products under HTS 2934.20.15.00
2-Mercaptobenzothiazole (MBT) Powder
2-Mercaptobenzothiazole is a heterocyclic compound containing a benzothiazole ring system, specifically listed under HTS 2934.20.1500. It is primarily used as an accelerator in rubber vulcanization processes to enhance curing speed and performance.
2-Mercaptobenzothiazole Industrial Grade 98%
High-purity industrial grade 2-Mercaptobenzothiazole at 98% minimum assay, qualifying as a chemically defined compound under HTS 2934.20.1500. Used in tire manufacturing and rubber belt production for optimal cross-linking.
CBS Benzothiazole Sulfenamide Accelerator
CBS (CZ) is N-Cyclohexyl-2-benzothiazole sulfenamide, chemically related to named NOBS in HTS 2934.20.1500 via benzothiazole structure. Provides excellent processing safety for automotive rubber components.
MBTS Dibenzothiazole Disulfide
MBTS, derived from 2-Mercaptobenzothiazole, contains two benzothiazole rings linked by disulfide bond, qualifying under HTS 2934.20.1500 provisions. Slow-curing accelerator used in EPDM rubber formulations.
NOBS MBS Rubber Accelerator 95% Powder
MBS (MOR) is 2-(Morpholinothio)benzothiazole, a sulfenamide accelerator analogous to named NOBS under HTS 2934.20.1500. Provides balanced cure rate and scorch resistance for conveyor belts.