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過 か硫酸 りゅうさんではありません
karyūsandewārimasen

敬
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Noun
, 
Desu Copula
, 
Negation Auxiliary

The polite negative form of 過硫酸

1. Is not persulfate.; Is not potassium persulfate.

Negative
, 
Polite
, 
Formal Register

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過硫酸ではありません

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