How to Write 胲 (hǎi) — Meaning “hydroxylamine”

Imagine the left part 月 as a crescent moon, and the right part 亥 as a pig (亥 is the zodiac sign for pig). Picture a pig on the moon holding a flask of hydroxylamine. This silly image helps link the character's form to its chemical meaning.

Write the left radical 月 first with 4 strokes: a vertical left stroke, then horizontal fold, then two inner horizontal lines. Then write 亥 on the right, being careful to write the top dot, then the horizontal stroke, then the sweeping stroke, and finish with two dots inside the bottom '儿' shape. A common mistake is to misplace the bottom dots of 亥.

胲 (hǎi) has the right component 亥, meaning 'hydroxylamine.' 朊 (ruǎn) has 元 on the right and means 'protein' or 'soft,' used in biology. 朋 (péng) consists of two 月 side by side and means 'friend.' Visually, 朊 and 胲 both use 月 plus another part, while 朋 is symmetrical.

胲 is a technical term used almost exclusively in organic chemistry, such as in the words 胲基 ('hydroxylamino group') and 胲类 ('hydroxylamines'). It is not found in everyday conversation or common texts, and has no special cultural significance outside scientific literature.

Common words containing 胲 include: 胲 (hǎi) — hydroxylamine; 胲基 (hǎi jī) — hydroxylamino group; 胲类 (hǎi lèi) — hydroxylamines.