Hicide®k18 fungicide Performance Hicide®k18 is a broad-spectrum bactericide based on chloromethyl thiazole and organic bromine, this product is more broad-spectrum, it is effective for Gram-positive and negative bacteria in water, and can effectively prevent microbial infestation under low dosage. Physical and chemical properties Appearance Colorless to light yellow transparent liquid with slight characteristic odor. PH (25 â??) 2.5-4.5 Solubility (25 â??) Completely dissolved in water, low molecular alcohol and ethylene glycol. Foaming (DIN 53902) No bubbles.