羟腈羥腈 in English

Character breakdown

• 羟羥 qiǎng hydroxyl (radical)
• 腈 jīng acrylic

How it used to be written

These are the forms of 羥, the traditional character: 羟 is a twentieth-century simplification, found in no ancient corpus.

• Small seal script

Forms, sources and dates: the 字形演變 database of 小學堂, Academia Sinica, public domain (CC0).