WESTCO™ MBT Accelerator Mercaptobenzothiazole CAS# 149-30-4

WESTCO™ MBT is a primary accelerator for natural and synthetic rubbers with excellent low temperature curing properties. It may be used in non-staining and non-black vulcanizates. It provides anti-scorch protection in sulfurless rubber compounds. It acts as a retarder in CR compounds.

Solubility: Soluble in acetone, ether, alcohol, benzene, chloroform, carbon tetrachloride.
Slightly soluble in water when mixed with alkalines.


Appearance: Light yellow/yellow

Granular, Powder, Oiled Powder

Melting Point, °C

*170 min, *170 min, *170 min

Purity, %

95.0 min, 95.0 min, 95.0 min

Ash, %

*.3 max, *.3 max, *.3 max

Moisture, %

*.3 max, *.3 max, *.3 max

Content of Oil, %

NA, NA, *1-2

Grain strength

*1.5 to 4.0N, NA, NA

Specific Gravity, typical

1.51, 1.51, 1.51

Residue on 100 mesh, %

NA, *0.1 max, *0.1 max

* Actual data will be reported on Certificate of Analysis.

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      • Western Reserve Chemicals
      • 60 S. Seiberling Street
      • Akron, OH 44305

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