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104.3 - Stoichiometry (powder form)

These SRMs are defined as primary, working, and secondary standards in accordance with recommendations of the Analytical Chemistry Section of the International Union of Pure and Applied Chemistry [Ref. Analyst 90, 251 (1965)]. These definitions are as follows:
Primary Standard:
a commercially available substance of purity 100 ± 0.02% (Purity 99.98 + %).
Working Standard:
a commercially available substance of purity 100 ± 0.05% (Purity 99. 95 + %).
Secondary Standard:
a substance of lower purity which can be standardized against a primary grade standard.

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     Chloride Cl (mass fraction %)
Intended Use
Potassium Chloride KCl (mass fraction %)
Potassium K (mass fraction %)
Stoichiometeric Purity (mass fraction %)
Detail Certificate MSDS 17f
Out of Stock
Sucrose Optical Rotation 60 g     Optical Rotation     99.956
Detail Certificate MSDS 84l
Now Selling
Potassium Hydrogen Phthalate 60 g     Acidimetric Standard     99.9934
Detail Certificate MSDS 136f
Now Selling
Potassium Dichromate (Oxidimetric Standard) 60 g     Oxidimetric Standard     99.9954
Detail Certificate MSDS 350c
Now Selling
Benzoic Acid (Acidimetric Standard)
30 g     Acidimetric Standard     99.959
Detail Certificate MSDS 351a
Out of Stock
Sodium Carbonate (Acidimetric Standard)
50 g     Acidimetric Standard     99.970
Detail Certificate MSDS 723e
Now Selling
Tris(hydroxymethyl)aminomethane (HOCH2)3CNH2 Acidimetric Standard
50 g         99.97  
Detail Certificate MSDS 917c
Out of Stock
D-Glucose (Dextrose) 50 g     Purity Optical Rotation     99.7
Detail Certificate MSDS 973
Now Selling
Boric Acid Acidimetric Standard 100 g     Acidimetric Value     100.009
Detail Certificate MSDS 999c
Now Selling
Potassium Chloride Primary Standard
30 g   47.5519   99.987 52.443
Detail Report of Investigation MSDS 8040a
Now Selling
Sodium Oxalate (Reductometric Standard) 60 g     Reductometric Standard     99.975