PRINCETON, NJ - Rockwood Holdings announced today that it has completed the sale of its electronics business to OM Group. The net proceeds of the sale were approximately $300 million, according to Business Wire.

The sale included Rockwood's ultra-pure chemicals, printed circuit board and photomasks businesses. In 2006, the segment had sales of $187 million..

Rockwood Holdings, Inc. is a specialty chemicals and advanced materials company, with a worldwide employee base of approximately 10,000 people and annual net sales of approximately $3.0 billion. The company focuses on global niche segments of the specialty chemicals, pigments and additives and advanced materials markets.