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CAS-20®-4 Calcium Sulfate Filler

Extremely bright white mineral used to extend more costly titanium dioxide.



Extremely bright white mineral used to extend more costly titanium dioxide. An anhydrous form of calcium sulfate used in white color concentrates and filled plastics applications.

Less costly than and effective in extending titanium dioxide (Ti02), CAS-20®-4 Calcium Sulfate Filler is used in a variety of applications including packaging, appliances, food contact, infrastructure and powder coatings.CAS-20®-4 Calcium Sulfate Filler can replace up to 25% of Ti02 without degrading other properties of the resin system.

Main Features

  • White color that maintains opacity and brightness
  • Less wear and abrasion on processing equipment
  • Acid-resistance to food and other mild acids
  • Improved product strength and abuse-resistance
  • Does not conduct electricity
  • Improved process efficiency
  • Exterior product longevity
  • Excellent surface appearance and product quality

Documents & Files

Data Sheets & Specifications

Data/Submittal Sheet (English) PDF 201.0 KB

White Papers

White Paper (English) PDF 3.4 MB

Catalogs & Brochures

Brochure (English) PDF 3.5 MB

Installation & Technical Manuals

Technical Guide (English/language) PDF 54.0 KB

SDS, Certifications & Reports

SDS (English)
SDS (Spanish) PDF 59.4 KB
Certificates (English) PDF 150.7 KB

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q & a

  • Are USG calcium sulfate products safe for food applications?

    USG food and pharmaceutical grade calcium sulfate filler products conform to FDA Regulation 21CFR184.1230, and are affirmed as GRAS (Generally Regarded as Safe). Calcium sulfate filler products are also safe to use in food packaging applications.

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    Call our Technical Support team at 800-874-4968 (Monday-Friday, 7:30 am - 4 pm Central).