塩素(えんそ)

えんそ
noun
chlorine
technicalscience
1. chlorine
A chemical element (Cl) that is a yellowish-green toxic gas with a strong smell. In everyday Japanese, most commonly encountered in the context of water purification (tap water, swimming pools) and cleaning products.
プールの塩素(えんそ)の匂(にお)いがする。
I can smell the chlorine from the pool.
水道水(すいどうすい)は塩素(えんそ)で消毒(しょうどく)されている。
Tap water is disinfected with chlorine.
塩素(えんそ)系(けい)の漂白剤(ひょうはくざい)を使(つか)うときは、換気(かんき)を十分(じゅうぶん)に行(おこな)ってください。
When using chlorine-based bleach, please ensure adequate ventilation.

Usage

In everyday life, 塩素(えんそ) is most commonly discussed in the context of tap water treatment and swimming pool maintenance. The kanji 塩(えん) (salt) reflects that chlorine was historically obtained from salt (塩(しお)).

Common collocations

Related Words

Related: 酸素(さんそ) (oxygen)
Related: 水素(すいそ) (hydrogen)
Compare: 塩化物(えんかぶつ) (chloride)
general
Added 2026.2.20 18:00 · Revised 2026.9.4 21:29
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