Propargyl Chloride (C3H3Cl) CAS No. 624-65-7 Appearance: Clear colorless liquid Assay: 97%min. & 65%min. Application: It is a starting material for manufacturing brightening additives for nickel plating. As a propargyl precursor, it is widely used in all kinds of synthesis and pharmaceutical. What is more, it is a corrosion inhibitor and antirust