Refers to a product that prevents or masks body odor. Commonly used in compounds like デオドラントスプレー (deodorant spray).
夏はデオドラントが欠かせない。
Deodorant is essential in summer.
制汗剤 specifically refers to antiperspirants that suppress sweating, while デオドラント is a broader term for odor control products.
Borrowed from English 'deodorant'.