硫 means “sulfur”

りゅう · ryuu

Also: sulphur

On'yomi (Chinese reading)

リュウ

JLPT N1 · Taught in secondary school · 12 strokes

The story

Stone (石) beside 流 without its water, the flowing part: picture yellow rock oozing from a volcanic vent. 硫酸 is sulfuric acid, and 硫黄 (いおう) is sulfur, blamed for the rotten-egg smell of hot springs that really comes from 硫化水素, hydrogen sulfide.

Used in 硫酸 (ryuusan, sulfuric acid), 硫黄 (iou, sulfur), and 硫化水素 (ryuukasuiso, hydrogen sulfide)

More from Atoms & Acids

• 硝 saltpeter
• 核 nucleus
• 素 element
• 析 analyze
• 酸 acid
• 粘 sticky
• 鉛 lead (metal)
• 凝 congeal
• 窒 block

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.