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104.9 - Stable Isotopic Materials (solid and solution forms)

The isotopic composition of these SRMs has been determined by mass spectrometry.

For light stable isotopic materials value assigned on an artifact based scale,
see Table 104.10

SRMs marked by an asterisk (*) are subject to license requirement by the NRC (or Agreement State) for transfer within the United States (U.S.).  License certification is required of purchaser by NIST prior to shipment.

When an import permit for radioactive material is required of a customer outside the U.S., NIST must have a copy to complete an order and facilitate shipment.

"Radionuclide Calibration Services"

"Radioactive SRM Purchasing Instructions & License Certification Form"

"Radioactive SRMs-General Info"

PLEASE NOTE: The tables are presented to facilitate comparisons among a family of materials to help customers select the best SRM for their needs. For specific values and uncertainties, the certificate is the only official source.


- Certified values are normal font
- Reference values are italicized
- Values in parentheses are for information only


Detail - Detail    Certificate - Certificate    Report of Investigation - Report of Investigation    MSDS - MSDS    Data Files - Data Files    Questionaire - Questionnaire


  SRM Description Unit of Issue     Isotopic Measurand
NRC License or Equivalent Required*
Detail Certificate MSDS 951a
Now Selling
Boric Acid Isotopic Standard 10 g   Boron --
Detail Certificate MSDS 952
Out of Stock
Enriched Boric Acid Standard 0.25 g   Boron --
Detail Certificate MSDS 973
Now Selling
Boric Acid Acidimetric Standard 100 g   Boron --
Detail Certificate MSDS 975a
Now Selling
Isotopic Standard for Chlorine
0.25 g   Chlorine --
Detail Certificate MSDS 977
Now Selling
Isotopic Standard for Bromine
0.25 g   Bromine --
Detail Certificate MSDS 978a
Now Selling
Assay-Isotopic Standard for Silver
0.25 g   Silver --
Detail Certificate MSDS 979
Now Selling
Chromium Isotopic Standard 0.25 g   Chromium --
Detail Certificate MSDS 980
Now Selling
Isotopic Standard for Magnesium
0.25 g   Magnesium --
Detail Certificate MSDS 981
Now Selling
Common Lead Isotopic Standard 1 g wire   Lead --
Detail Certificate MSDS 982
Out of Stock
Equal-Atom Lead Isotopic Standard 1 g wire   Lead X
Detail Certificate MSDS 983
Now Selling
Radiogenic Lead Isotopic Standard 1 g wire   Lead X
Detail Certificate MSDS 984
Now Selling
Rubidium Chloride
0.25 g   Rubidium --
Detail MSDS 986
Out of Stock
Isotopic Standard for Nickel
0.5 g   Nickel --
Detail Certificate MSDS 987
Now Selling
Strontium Carbonate Isotopic Standard 1 g   Strontium --
Detail Certificate MSDS 994
Now Selling
Isotopic Standard for Gallium
0.25 g   Gallium --
Detail Certificate MSDS 997
Out of Stock
Thallium Isotopic Standard 0.25 g   Thallium --
Detail 3230
Out of Stock
Iodine-129 Isotopic Standard (Low Level) 5x5 mL      
Detail 3231
Out of Stock
Iodine-129 Isotopic Standard (High Level) 5x5 mL   Iodine  
Detail Report of Investigation MSDS 8599
Now Selling
Henderson Molybdenite 10 g   --