Caustic soda (ma julwongo bende ni sodium hydroxide) utiye kemikol ma tiyo ku yore madwong man ma jutiyo kudu lee i tic matung tung macalo bongo, karatasi man karatasi, alumina, sabun man jam lwoko bongo, yiku moo man yiku pii. Pol kare jucwalo i ayi aryo: pii (alkali) man tek (flakes). Caustic soda flakes yot ni tero i kabedo mabor man gibedo piny ma jumaru ni cwalo woko. Dul ne utiye kampuni mir aryo madit uloyu i India ku kero mi yubu 1 million tonnes kubang oro.