WESTCO™ MBI 2-mercaptobenzimidazole CAS# 583-39-1

WESTCO™ MBI is a non-staining secondary antioxidant for natural rubber, CR, SBR, NBR &EPR and prevents heat oxidation when used in combination with amines.

Storage conditions:  This product should be shipped and stored in a cool and dry location away from direct sunlight.

Packaging:  25 kg net weight bags in Kraft Bags with PE liner


Appearance: White powder

Powder, Oiled Powder

*Assay, %

96.0 Min, 95.0 Min

*Melting Point, °C

290 Min , 290 Min

*Heat Loss, %

0.40 Max, 0.40 Max

*Ash, %

0.40 Max, 0.40 Max

*Sieve residue, 63 µm% (230 mesh)

0.50 Max, 0.50 Max

*Sieve residue, 150 µm% (100 mesh)

0.10 Max, 0.10 Max

Oil content, %

NA, 1.0-2.0

Density at 20◦C(kg/m³)

1400, 1400

Bulk Density (kg/m³)

400-450, 400-450

*Reported on certificate of analysis.

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

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