Boric acid, i kapa ʻia ʻo hydrogen borate, boracic acid, orthoboric acid a me acidum boricum, kahi nāwaliwali, monobasic Lewis acid o boron, i hoʻohana pinepine ʻia ma ke ʻano he antiseptic, insecticide, retardant flame, neutron absorber, a i ʻole ma mua o nā mea hoʻohui kemika ʻē aʻe. Loaʻa iā ia ka haʻina kemika H3BO3 (i kekahi manawa kākau ʻia B (OH) 3), a aia ma ke ʻano o nā aniani kala ʻole a i ʻole kahi pauka keʻokeʻo e hoʻonā i ka wai. Ke kū nei ma ke ʻano he mineral, kapa ʻia ia ʻo sassolite.