Item #41180 (possibly named "Monster Staff Northrend D01 Purple Disintegration") doesn't exist. It may have been removed from the game.
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Monster - Staff, Northrend D01 Purple, Disintegration - Live
Monster - Staff, Northrend D01 Purple, Disintegration - PTR
Monster - Staff, Northrend D01 Purple, Disintegration - PTR 2
Monster - Staff, Northrend D01 Purple, Disintegration - Beta
Monster - Staff, Northrend D01 Purple, Disintegration - Wrath of the Lich King
Monster - Staff, Northrend D01 Purple, Disintegration - Cataclysm