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CR-4-USP ZINC OXIDE CAS# 1314-13-2

CR-4-USP Zinc Oxide is used in natural and synthetic rubber compounds as part of the cure system activation. It can also enhance heat aging properties of the vulcanized rubber. It is typically added a 3.0 – 5.0 phr level, early in the mixing process except with polychloroprene compounds. The high purity of CR-4-USP allows it to be used in medical and pharmaceutical rubber products.

Packaging: 50 lb. bags

Shelf life: 24 months from manufacturing date

SPECIFICATIONS:

*Zinc Oxide

99.9% Min.

*Lead

20 ppm Max.

*Cadmium

10 ppm Max.

*Copper

10 ppm Max.

*Arsenic

6 ppm Max.

*Loss at 110°C

0.07% Max.

*Loss on Ignition

0.20% Max.

*Retained on 325 mesh U. S. sieve

0.02% Max.

*Surface Area

4.0 - 5.0 m2/g

*Iron & other heavy metals

Pass USP tests

*Carbonate

Pass USP tests

*Alkalinity

Pass USP tests

Bulk Density

35.0 – 45.0 lb/ft2

Specific Gravity, typical

5.6

*Actual tech data / technical data values reported on Certificate of Analysis

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Technical Data & SDS Sheets

Technical Product Sheets and SDS sheets are available for each of the chemicals listed. To access please click on the links above.
  • Western Reserve Chemical
  • 4837 Darrow Road
  • Stow, OH 44224

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