German drugs and chemicals maker Merck KGaA cut its full-year profit outlook after the company announced several one-off adjustments.

The world's largest maker of liquid crystals for display screens said it now expects operating results of about 1 billion euros in 2011, below its previous guidance given in April.

Analysts on average had expected a 2011 operating result of 1.48 billion.

(Reporting by Ludwig Burger)