NIST is currently unable to ship to Russia, Belarus, and Ukraine. As a result, we are not currently accepting or processing orders that require shipping to these countries.

SRM Yearly Inventory Schedule for 2023:

  • Monday, September 18, 2023 is the last day that we will ship dry-ice, hazardous, and international orders
  • Tuesday, September 19, 2023 is the last day that we will accept domestic non-hazardous orders for immediate shipment prior to inventory
  • Wednesday, September 20, 2023 through Friday, September 29, 2023 – orders can be taken, but shipping will not occur
  • Monday, October 2, 2023 - all orders will begin to be shipped

Featured Programs

Ruler Icon An illustrated ruler icon.


The calibration services of the National Institute of Standards and Technology (NIST) are designed to help the makers and users of precision instruments achieve the highest possible levels of measurement quality and productivity.

See Calibration FAQs
Binary Document Icon An illustrated binary document icon.

Standard Reference Data

For over 50 years, NIST has developed and distributed Standard Reference Data in Chemistry, Engineering, Fluids and Condensed Phases, Material Sciences, Mathematical and Computer Sciences and Physics.

Lab Beaker IconAn illustrated lab beaker icon.

Standard Reference Materials

NIST supports accurate and compatible measurements by certifying and providing over 1200 Standard Reference Materials® with well-characterized composition or properties, or both.

SRM Home Page See SRM FAQs Archived Certificates