Glycerin

Chemical formula: C3H8O3
Physical properties: Glycerin is colorless and it's a liquid.
Chemical properties: Glycerin is odorless.
Derive from: Glycerin can be produce from triglycerides.
Health effects:  If you consume Glycerin it can cause anal irritation, burning sensation, diarrhea, gas, nausea, and stomach cramps.
Purpose of including: They include Glycerin in hair spray because it's moisturizer for the skin and hair
 lewis structure of Glycerin