Faybarro ku habboon sodium hydrosulfite
Sodium hydrosulfite wuxuu ku habboon yahay noocyada kala duwan ee faybarka dharka, sidaas darteed waxaa loogu magac daray "Rongalite." Marka loo isticmaalo cadayashada heerkulka sare ama ka saarista wasakhda, faybarka dharka waa inuu awood u yeesho inuu u adkeysto heerkulka sare isagoon waxyeello gaarin.
Marka laga hadlayo shahaadada, sodium hydrosulfite ma aysan gudbin oo keliya shahaadada Heerka 3aad ee ZDHC, laakiin sidoo kale waxay ka gudubtay shahaadooyin nidaam oo badan sida ISO 9001, 14001, iyo 45001, taasoo gaartay heer tayo dhammaystiran, ilaalin deegaan, iyo heer badbaado.​