This is moronic and doesn't actually answer the question. "What is Dust Remover?" refers to "What is Dust Remover composed of?"
Anyone with half a brain understands that 1) the can they just purchased is an aerosol can, 2) the can they just sprayed at their appliance fired a collection of chemicals, and 3) the collection of chemicals is clearly inherit or simply benign to electronics/most surfaces or it wouldn't be marketed for such a purpose.
This answer is akin to: "What is a chair?", Answer: "A chair is something that allows you to sit in comfort." Who would be searching the internet for this answer?
The question here is, "What is dust remover?" (a.k.a what is it commonly/less commonly composed of chemical-wise).