The present invention relates to carvedilol phosphate salts, which include novel crystalline forms of carvedilol dihydrogen phosphate ethylamino-2-propanol) andor carvedilol hydrogen phosphate, etc. The thermogenic energy also strengthens tissue in proximity to a staple line and knife cut line and provides hemostasis along the staple and cut lines formed by the staples and a knife blade during surgical stapling. The utility network interface device also includes a control unit configured to detect a tampering with the utility meter in accordance with the state signal produced by the detector. The apparatus is adjustable such that the conveyor and vehicle may be substantially aligned for travel. The phenolic resin composition contains 70-97% by weight of a phenolic resin and 3-30% by weight of a silicone-based rubber component and has a ratio of an ortho-bonding to a para-bonding at a methylene bonding in the phenolic resin of 2-9. The present invention discloses a method for purifying \u03b1-methylstyrene by reacting polar substances contained in the \u03b1-methylstyrene in the presence of a basic substance, and separating a reaction product of the polar substance and the \u03b1-methylstyrene.