Tsim los ntawm iav, borosilicate iav lossis dej qab zib iav, reagent fwj featospers lossis kaus mom, uas tiv thaiv cov ntsiab lus los ntawm kev sib kis lossis sab nraud. Reagent Fwj tau zoo heev rau khaws cov hmoov thiab kua. Reagent fwj muaj nyob nrog qhov ncauj nqaim rau kev tswj tau zoo dua thaum hliv tau yooj yim lossis cov ntsiab lus rov qab. Aijiren tsim tag nrho cov realgent fwj thiab kaus mom hauv chav kawm 100000 chav dej huv.