A cunglei thil kalning pathum hi formic acid chuahnak ah hman tawnmi an si. A biapi mi organic chemical thilri pakhat a si bantukin, formic acid cu thilpuan, savun le rubber tibantuk chawlehnak ah tampi hman a si. Cucaah, thilchuah thiamnak ah thanchonak le tthatnak cu tthatnak le tthatnak tthanchoternak caah a biapi tukmi a si. Hmailei ah, pehzulh tein thiamnak tthanchonak he, formic acid chuahnak kalning cu a tthancho chin lengmang lai, cu nih cun ttha deuh le pawngkam he aa remmi thil sernak a tuah khawh lai.

August in October tiang formic acid man tlawmternak caah, hika hi hmet law hmuh khawh a si.