white powder or light yellow liquid. Used as pharmaceutical raw materials, an important bacteriostatic agent of eye drops. Details Polyquaternium-1/PQ-1 is a detergent-based preservative derived from BAK. PQ-1 was formulated by Alcon in the mid-1980s as a preservative for contact lens storage solutions. Today, it is increasingly used as a preservative in glaucoma eye drops and artificial tears Specifications Item Specifications Appearance Clarify,amber,viscous liquid Smell without stimulation Molecular weight 6500-57000Da Chloride ＜10% Assay ＞33% Free amine ＜2.0% PH 6~9 Water solubility whole soluted Package: solution: 1KG/bottle, powder: 100G/bag. Storage: in a dry and ventilated warehouse; keep away from sunshine; avoid fire; avoid moisture.
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