Potassium Hydrogen Phthalate Acidimetric Standard Crystal Reagent Special ACS Inorganic Ventures ICP Single-Component Standards 3 LEAD 5 ppm LOSS

3 LEAD 5 ppm LOSS ON DRYING 0

00% CADMIUM (Cd) 0

00% LEAD (Pb) 2 mg/kg IRON (Fe) 10 mg/kg SELENIUM (Se) 5 mg/kg IDENTIFICATION TO PASS TEST TO PASS TEST RETEST DATE DATE OF MANUFACTURE APPEARANCE

Test Specification Min Max ASSAY 19 21 % (w/v) TRACEABLE TO NIST APPEARANCE EXPIRATION DATE DATE OF MANUFACTURE

0002 meq RETEST DATE

Potassium Hydrogen Phthalate Acidimetric Standard Crystal Reagent Special ACS Inorganic Ventures ICP Single-Component Standards 3 LEAD 5 ppm LOSSTest Specification Min Max ASSAY (C[@8@]H[@5@]O[@4@]K) 99. 95 100. 05 % 99. 95 100. 05 % ASSAY (C[@8@]H[@5@]O[@4@]K) 99. 95 100. 05 % 99. 95 100. 05 % ASSAY (C[@8@]H[@5@]O[@4@]K) 99. 95 100. 05 % 99. 95 100. 05 % ASSAY (C[@8@]H[@5@]O[@4@]K) 99. 95 100. 05 % 99. 95 100. 05 % ASSAY (C[@8@]H[@5@]O[@4@]K) 99. 95 100. 05 % 99. 95 100. 05 % ASSAY (C[@8@]H[@5@]O[@4@]K) 99. 95 100. 05 % 99. 95 100. 05 % pH OF A 0. 05M SOLUTION @ 25[dC 4. 00 4. 02 4. 00 4. 02