Hyaluronic Acid (Cosmetic grade) CAS: 9004-61-9 HA is a natural biotic component, widely existing in skin and any other tissue. It has outstanding moisture keeping ability. Test Items Standard Appearance White powder Hyaluronic Acid ¡Ý95% Molecular weight (1.5-1.7) X 106 PH 6.0-7.5 Loss on drying