Ferrochrome Lignosulfonate (FCLS) SKU: SKU RXSOL-81-8108-026 Product Category: Category Drilling Fluids & Mud Oil Field chemicals-81 Variations Ferrochrome Lignosulfonate (FCLS) Short Description Short Description FCLS has superior deflocculating capabilities, even in the presence of contaminants and elevated temperatures. It is effective at temperature in excess of 150℃, RXSOLFCLS is a good emulsifier for oil in water mud.