Buffer Solution pH 5.00 Reference Standard Ru (Ruthenium) Compounds Test Specification Min Max ABSORPTION

Test Specification Min Max ABSORPTION MAX 456 nm 456 nm

70% ARSENIC (As) 3 mg/kg FLUORIDE 0

0mm�/ ACIDITY TO PASS TEST TO PASS TEST READILY CARBONIZABLE SUBSTANCES TO PASS TEST TO PASS TEST SOLID PARAFFIN TO PASS TEST TO PASS TEST POLYCYCLIC AROMATIC HYDROCARBONS TO PASS TEST TO PASS TEST SULFUR COMPOUNDS TO PASS TEST TO PASS TEST ELEMENTAL IMPURITIES AS REPORTED AS REPORTED IDENTIFICATION TO PASS TEST TO PASS TEST EXPIRATION DATE DATE OF MANUFACTURE APPEARANCE RESIDUAL SOLVENTS TO PASS TEST TO PASS TEST

0 VISCOSITY (25�C

Buffer Solution pH 5.00 Reference Standard Ru (Ruthenium) Compounds Test Specification Min Max ABSORPTIONTest Specification Min Max pH @ 25[dC 5. 00 + 0. 02 5. 00 + 0. 02 STANDARDIZED AGAINST NIST EXPIRATION DATE DATE OF MANUFACTURE APPEARANCE