Maximize the value of your microbiological certified materials with NSI's MicroVive™ - 30-day rehydration fluid.

Order This Unique Product Today
slider img

Proficiency Testing and PT Express™

Spex® CertiPrep now offers Proficiency Testing and PT Express products for a variety of testing schemes for both quantitative and qualitative test performance.

Learn More
slider img

USP Proficiency Testing Program

In partnership with USP, now offering Proficiency Testing products for a variety of testing schemes for both quantitative and qualitative test performance.

Learn More
slider img

The Broadest Selection of Cannabis CRMs & PT

NEW! High Abundance Terpene Mix - our latest terpene mix takes into consideration the natural differences in concentration in a terpene profile.

Learn more

Products

spexcerti

It’s not only what we do, it’s how we do it.

Read More

Our History

Manufacturing Certified Reference Materials since 1954

View Our History

Certifications

Most comprehensive scope of accreditations and certifications in the industry

View Certifications

Chat With an Expert

Dedicated technical support to answer your CRM and lab questions

View Chat With an Expert

Documentation

Get Your SDS and SPEXertificate

View Documentation

Check Out Our USP Calculator

Tools, Tips and Tricks

View Check Out Our USP Calculator

News & Events

Want to know what Spex® Certiprep is up to?

View News & Events