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New Phentolamine Mesylate solid forms Abstract: The current invention discloses three new solid forms of the α-adrenergic receptor antagonist Phentolamine Mesylate Background: Phentolamine Mesylate (Phenol, 3-[[(4,5-dihydro-1H-imidazol-2-yl)methyl](4-methylphenyl)amino]-, methanesulfonate, CAS 65-28-1) is a reversible, non-selective α-adrenergic antagonist primarily used in the treatment of hypertensive emergencies. The Api has the following structure formula: Figure 1: chemical structure of Phentolamine Mesylate No evidence of polymorphs, solvates,...