Caustic soda (alimwi wiitwa kuti sodium hydroxide) nchintu chibelesegwa munzila zyiingi alimwi chibelesegwa mumakkampani miingi iibelesyegwa mumakwebo miingi mbuli zyakusama, mapepa, alumina, nsipa azintu zyakusanzya, kusalazya mafuta akusalazya maanzi. Chiindi chiingi chisambalwa muzibeela zyobile: maanzi (alkali) achiyumu (zibeela). Zibeela zya soda zitakatazyi kunyamuna musinzo mulamfu mpawo nzizyo ziyandisi kapati kuti zituminwe kunze aacisi. Inkampani eeyi njiyabili mubupati bwakupanga soda muIndia mpawo ilakonzya kupanga matani aasika ku 1 miliyoni amwaka.