Hydroxypropyl Cellulose 4000-6500 cP NF Protein Purification 0 % COLOR (APHA) 10

0 % COLOR (APHA) 10 CHLORIDE (Cl) 100 ppb NITRATE (NO[@3@]) 200 ppb PHOSPHATE (PO[@4@]) 500 ppb ARSENIC AND ANTIMONY (as AS) 5 ppb Aluminum (Al) 200 ppb BORON (B) 10 ppb CALCIUM (Ca) 300 ppb CHROMIUM (Cr) 200 ppb COPPER (Cu) 100 ppb GOLD (Au) 300 ppb IRON (Fe) 200 ppb LEAD (Pb) 300 ppb MAGNESIUM (Mg) 300 ppb MANGANESE (Mn) 200 ppb NICKEL (Ni) 100 ppb POTASSIUM (K) 300 ppb SODIUM (Na) 300 ppb TIN (Sn) 200 ppb TITANIUM (Ti) 300 ppb ZINC (Zn) 200 ppb PARTICLE COUNT (>/=1

0 % COLOR (APHA) 10 RESIDUE AFTER EVAPORATION 5 ppm ACIDS AND PHOSGENE (as HCl) 5 ppm WATER 0

Test Specification Min Max SENSITIVITY AS INDICATOR TO PASS TEST TO PASS TEST RETEST DATE

Test Specification Min Max APPEARANCE OFF-WHITE POWDER OFF-WHITE POWDER PARTICLE SIZE 40 - 80 MESH 40 - 80 MESH ACTIVITY (VANADIUM) 0

0 % ANGULAR ROTATION -2 to -5 -2 to -5 REFRACTIVE INDEX @ 20[dC 1

Hydroxypropyl Cellulose 4000-6500 cP NF Protein Purification 0 % COLOR (APHA) 10Test Specification Min Max ASSAY (HYDROXYPROPOXY GROUPS) 53. 4 80. 50% APPARENT VISCOSITY OF A 2% AQUEOUS SOLN. @25 C As reported As reported pH OF A 1% SOLUTION 5 8 LOSS ON DRYING 5. 00% SILICA OR OTHER ANTICAKING AGENTS 0. 60% RESIDUE ON IGNITION 0. 80% LEAD 10 ppm ELEMENTAL IMPURITIES AS REPORTED AS REPORTED IDENTIFICATION TO PASS TEST TO PASS TEST RETEST DATE DATE OF MANUFACTURE APPEARANCE RESIDUAL SOLVENTS TO PASS TEST TO PASS TEST