二氯异三聚氰酸钠

• 二(number two; two horizontal strokes)ASSOCIATIVE

Two parallel horizontal strokes symbolize the number two.

• 一(one; horizontal stroke)ASSOCIATIVE
• 二(two (pictograph – two horizontal strokes))ASSOCIATIVE

Three horizontal strokes stacked on top of each other symbolize the number three.

• 取(take; gather)ASSOCIATIVE
• 乑(many people standing together)ASSOCIATIVE

Many people pulling together to the same place to gather and stay together.

• 酉(wine vessel; ferment)RADICAL
• 夋(slow manner; leisurely pace)PHONETIC

Fermenting alcohol produces sourness, which is exactly the character for sour.