Chondroitin Sulphate Appearence: White powder PH Acidity: 5.5-7.5 Protein:<6.0% Sulfate:<2,400ppm Heavy Metals:<20ppm Chlorides:<5,000ppm Loss on Drying:<10.0% Ash: 20.0-30.0% Specific Rotation: -12- -20 Assay: >90.0% Total Bacterial Count:<3,000CFU/g Tetracycline: Negative E.Coli: Negative Guarantee Period: 2 years