有害 ゆうがい化学 かがく物質 ぶっしつでしょう
yūgaikagakubusshitsudeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 有害化学物質

1. Harmful chemical substance, probably.; It will likely be a harmful chemical substance.

Polite
Presumptive
Conjecture
Chemistry