1.Usage: Cooper mining reagent,tanning, dye, chemical material, etc. 2.Sodium Hydrosulphide is yellow flakes or solid ... applications including, but not limited to agricultural, dyes, and other chemical processing. ENVIRONMENTAL APPLICATIONSNaHS is an effective tool in a waste ... (white liquor) during pulp mill outages and as amake-up chemical to replace lost sulfur values. It may also be used ...