ʻO ka hao hao he mea hoʻohana nui ʻole ʻia me nā waiwai a me nā waiwai penei: Nā waiwai kino: He mea paʻa ka hao hao a hele mai i nā waihoʻoluʻu like ʻole, e like me ka ʻulaʻula (Fe2O3), melemele (α-Fe2O3), ʻeleʻele (Fe3O4), a ʻeleʻele (FeO). Loaʻa iā lākou nā ʻano hana aniani a me nā ʻāpana lattice. Mākēneki: Fe3O4 (magnetic iron ore) i iron oxide e hōʻike ana i ka magnetism a loaʻa iā ia nā hiʻohiʻona hoʻololi hoʻololi kiʻekiʻe. Hoʻohana nui ʻia kēia i nā kahua e like me nā mea magnetic a me nā media hoʻopaʻa leo magnetic. Nā waiwai kemika: ʻO ka hao hao he mea hiki ʻole ke hoʻoheheʻe ʻia i ka wai me ka paʻa kemika kiʻekiʻe. He kūpaʻa loa ia i nā waikawa a me nā alkali. Paʻa kala: ʻO ka hao hao i nā ʻano ʻano like ʻole ka paʻa o ka waihoʻoluʻu maikaʻi, no laila e hoʻohana nui ʻia lākou i nā ʻano puaʻa, nā kala a me nā kala. ʻO nā waiwai Optical: Hiki i ka hao hao ke hoʻopaʻa a hōʻike i ka mālamalama i loko o ka pahu kukui ʻike ʻia, kahi e hoʻohana ai i ka hoʻomākaukau ʻana i nā mea optical, nā puaʻa a me nā catalysts. ʻO ke kūpaʻa wela: He kūpaʻa wela kiʻekiʻe ka hao hao a hiki ke mālama i ke kūpaʻa o kona mau kino kino a me nā mea kemika ma nā wahi wela kiʻekiʻe. ʻO nā mea āpau, loaʻa i ka iron oxide nā ʻano waiwai a me nā waiwai e hoʻohana nui ʻia ai ia i nā ʻano he nui, e like me ka ʻepekema waiwai, hoʻomākaukau lāʻau lapaʻau, mālama kaiapuni, a me nā mea ʻē aʻe.