酸素 さんそ けい漂白 ひょうはく ざいじゃありませんでした
sansokeihyōhaku zaijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 酸素系漂白剤

1. Was not oxygen-based bleach.; Was not an oxygen-based bleaching agent.

Past/Perfective
Negative
Polite
Terminal Form