What is the chemical formula for acacia?

Answer 1

Acacia is just a type of plant and as such has no chemical formula. The plant and is often used for practical applications such as medicines and dyes, however, and to that end there are certain compounds of interest from Acacia plants.

These are varied and many, however, so I would suggest a more specific question or further research.

http://en.wikipedia.org/wiki/Acacia

For further reading.