Change your country/region

It looks like you entered an employee email address, but this is the customer sign-in. Use the link below instead.

USG Calcium Sulfate (Feed Grade Gypsum)

Helps to supply the calcium and sulfur requirements for many types of livestock including dairy cows and laying hens.



Premium feed grade calcium sulfate for proper bone and teeth formation, milk production and egg shell formation. Also helps in the formation of sulfur-containing amino acids such as cystin, cysteine and methionine.

Main Features

Calcium Sulfate (Feed Grade Gypsum) helps to supply the calcium and sulfur requirements for many types of livestock including dairy cows and laying hens. Available in regular and coarse grinds, Calcium Sulfate (Feed Grade Gypsum):

  • Supplies, on average, 17% combined sulfur and available calcium at approximately 21%, which can reduce or even eliminate the need for adding calcium carbonate to the ration
  • Is an economical feed supplement
  • Is Kosher-certified – under the Kashruth certification of the Chicago Rabbinical Council
  • Is OMRI Listed® - it may be used in certified organic production or food processing and handling according to the USDA National Organic Program Rule.

Documents & Files

Installation & Technical Manuals

Technical Guide (English)

SDS, Certifications & Reports

SDS (English) PDF 43.8 KB
SDS (Spanish) PDF 43.5 KB
Certificates (English)

Ask a question

Our customer support team will get back to you as soon as possible.

Question Guidlines

  • Questions should relate to this product specifically.
  • For help with pricing, availability, or delivery, please call 800.874.4968 (Monday–Friday, 7am–6pm Central)
  • All questions and answers follow USG’s Terms & Conditions.
  • Your question and USG’s answer may be posted to this page in the future, but none of your personal info will be included.

 Thanks for your message. We’ll be in touch!

q & a

  • Is gypsum harmful to animals?

    No. On the contrary, USG Calcium Sulfate Feed Grade is used as a calcium enrichment for animal feed. USG Food and Pharmaceutical grade gypsum products are used in many human food and pharmaceutical applications. Gypsum should not be harmful if used appropriately.

  • Have a question?

    Let us do the research. We'll get back to you as quickly as we can.

    Ask USG
  • Need help right away?

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