... and ISO9001, is a leading manufacturer & exporter of Sodium Hydrosulphide, export Sodium Hydrosulfide Flakes, Sodium Hydrosulphide Solid in high quality at competitive price.Usage ... , not easy to be intenerated, especially less iron, sodium sulfide, sodium carbonate, insolubles impurity in water, DIP-dying in the ... Max Na2CO3 (%): 1% Max Water - Insoluble (%): 0.005% Max Sodium Hydrosulfide FLAKES