ʻIke ʻia hoʻi ʻo morphin, he wai ʻaila kala ʻole i ka lumi wela. Ka helu heheʻe -4.76 ℃, kahi e hoʻolapalapa ai 128.3 ℃. Māmā 1.0005g/cm3(20 ℃). Hōʻike hoʻohālikelike 1.4548. ʻO ke kiko uila 38 ℃ (ke kīʻaha hāmama). Hiki ke hui me ka wai, acetone, benzene, ether, alcohol, ethylene glycol, aila linseed, aila turpentine, aila castor. He ʻala hygroscopic a me ka amonia.