According to Regulation (EC) No 1272/2008 a.k.a "CLP", a hazard statement, or "H statement" is:
"a phrase assigned to a hazard class and category that describes the nature of the hazards of a hazardous substance or mixture, including, where appropriate, the degree of hazard."
Here is a list of all the H statements, as described in the CLP Regulation, categorised.