About Us

KEY SCIENTIFIC PRODUCTS has been serving science since 1935. Dr. Hoyt and Dr. Levine pioneered the concept of rapid substrate testing in diagnostic bacteriology; a concept widely used today in clinical diagnosis, research, and teaching. The KEY system employs a variety of manual tests with emphasis on substrate tablets, strips and discs. The company organized in California and was moved to Round Rock, Texas in 1991. Since that time, a whole new series of chromogenic substrates has been incorporated into tablets, swabs, and paper discs for identification of anaerobes as well as other fastidious organisms.  

We moved to our permanent location in Stamford, Texas in July 2006.


KEY SCIENTIFIC is a family-owned and operated company, committed to offering high quality products at reasonable prices. No product will be sold that does not meet the company’s quality assurance specifications.

We are located at the corner of State Hwy 6 and Reynolds Street in Stamford.

Our phone numbers are 800-843-1539 (tollfree) and 325-773-3918.  Our fax numbers are 888-440-4208 (tollfree) and 325-773-2793.