Sodium hydrosulphide (NaHS) 1)Yellow flake,easily being deliquescent,slight rotten ... ,high purity,not easy to be intenerated,especially less iron,sodium sulfide,sodium carbonate,insolubles impurity in water,dip-dying in the ... from being deliquescent.Sperated from acids,acidic materials,oxidizing agents. sodium hydrosulfide Yellowish Flake/16721-80-5