Caustic Soodhaha waa alkali xoog leh oo leh daxal xoog leh, guud ahaan qaab jajab ama blocks, si fudud ugu milmi biyaha (exothermic marka lagu milmo biyaha) oo sameeya xal alkaline ah, iyo deliquescent.
Galmada, way fududahay in la nuugo uumiga biyaha (deliquescent) iyo kaarboon laba ogsaydh (sii xumaanaya) hawada, waxaana lagu dari karaa hydrochloric acid si loo hubiyo in ay xumaatay.