4-(2-Iodoacetamido)-2266-tetramethylpiperidine 1-Oxyl Free Radical size:100 MG water) TO PASS TEST COLOR

water) TO PASS TEST COLOR (APHA) 10 RESIDUE AFTER EVAPORATION 0

Test Specification Min Max ASSAY (HCOOH) 85

91 % APPROX

935 WATER-SOLUBLE PHENOLS TO PASS TEST TO PASS TEST IDENTIFICATION TO PASS TEST TO PASS TEST RETEST DATE

Test Specification Min Max ASSAY (w/w) 93 - 98% 93 - 98% ALUMINUM 50 ppt ANTIMONY (Sb) 50 ppt ARSENIC (As) 500 ppt BARIUM (Ba) 10 ppt BERYLLIUM (BE) 10 ppt BISMUTH 10 ppt CADMIUM (Cd) 10 ppt CALCIUM (Ca) 100 ppt CERIUM 10 ppt CESIUM 10 ppt CHROMIUM (Cr) 10 ppt COBALT (Co) 10 ppt COPPER (Cu) 10 ppt DYSPROSIUM 10 ppt ERBIUM 10 ppt EUROPIUM 10 ppt GADOLINIUM 10 ppt GALLIUM (Ga) 10 ppt GERMANIUM 100 ppt HAFNIUM 10 ppt HOLMIUM 10 ppt INDIUM 10 ppt IRON (Fe) 50 ppt LANTHANUM 10 ppt LEAD (Pb) 10 ppt LITHIUM 10 ppt LUTETIUM 10 ppt MAGNESIUM (Mg) 50 ppt MANGANESE (Mn) 10 ppt MERCURY (Hg) 100 ppt MOLYBDENUM (Mo) 10 ppt NEODYMIUM 10 ppt NICKEL (Ni) 50 ppt NIOBIUM 10 ppt PALLADIUM AS REPORTED AS REPORTED PLATINUM AS REPORTED AS REPORTED POTASSIUM (K) 50 ppt PRASEODYMIUM 10 ppt RHODIUM (Rh) 50 ppt RUBIDIUM (Rb) 10 ppt SAMARIUM 10 ppt SCANDIUM 10 ppt SELENIUM (Se) 500 ppt SILVER (Ag) 50 ppt SODIUM (Na) 50 ppt STRONTIUM (Sr) 10 ppt TANTALUM AS REPORTED AS REPORTED TELLURIUM 100 ppt TERBIUM 10 ppt THALLIUM (Tl) 10 ppt THORIUM 10 ppt THULIUM 10 ppt TIN (Sn) 50 ppt TITANIUM (Ti) 50 ppt TUNGSTEN 10 ppt URANIUM 10 ppt VANADIUM (V) 10 ppt YTTERBIUM 10 ppt YTTRIUM 10 ppt ZINC (Zn) 50 ppt ZIRCONIUM (ZR) 10 ppt EXPIRATION DATE

4-(2-Iodoacetamido)-2266-tetramethylpiperidine 1-Oxyl Free Radical size:100 MG water) TO PASS TEST COLOR