自己 じこ反応 はんのう せい物質 ぶっしつだったら
jikohanno useibusshitsudattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 自己反応性物質

1. If it were a self-reactive substance; If it is a self-reactive substance

Tara Conditional
Chemistry