Signal Word
(A) The signal word shall be either "Danger," "Caution," or "Biological Hazard," "BIOHAZARD," or the biological hazard symbol.
(B) The major message shall indicate the specific hazardous condition or the instruction to be communicated to the employee.
http://www.seton.com/cgi-bin/ncommerce3/ProductDisplay?prmenbr=676&CTcount=0&prrfnbr=117675