Chemical agent and Siccative

Chemical agent noun - An agent that produces chemical reactions.

Siccative and chemical agent are semantically related. In some cases you can replace term "Siccative" with "Chemical agent", this terms are similar.

Siccative noun - A substance that promotes drying (e.g., calcium oxide absorbs water and is used to remove moisture).

Chemical agent and siccative are semantically related. Sometimes you can use "Chemical agent" instead a noun "Siccative".