じゅう炭酸 たんさんソーダじゃなかったです
jūtansan sōdajanakattadesu

Noun
Desu Copula

The polite, past negative form of 重炭酸ソーダ

1. It wasn't baking soda.; It wasn't sodium bicarbonate.

Past/Perfective
Negative
Polite
Casual Register