Icyuma na amoniyumu siturate (feri amoniyumu siturate): utuntu duto tunanutse dusobanutse dufite ibara ry'umutuku wa garunete, harimo nibura 16 % by'icyuma. Ikorwa mu gushonga feri hidorokiside nshya muri aside situriki na amoniya, ikumishwa mu mitambiko yoroheje; ibikwa kure y'urumuri (US Dispensatory 1907). Ni umunyu uterwa n'urumuri wa sianotipi.