自己 じこ反応 はんのう せい物質 ぶっしつではありません
jikohanno useibusshitsudewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 自己反応性物質

1. Not self-reactive.; Is not a self-reactive substance.

Negative
Polite
Formal Register
Chemistry