Houghton

Africa

Houghton South Africa

Chemetall (Pty) Ltd. – South Africa

Subsidiary of Rockwood Holdings, Inc.

5 Sellers Road

Boksburg East

P. O. Box 232

Boksburg, 1460

South Africa

Phone: 27-11-914-2500

Fax: 27-11-914-4792

Chemserve Systems

200 Bergrivier Drive

Chloorkop 1624

South Africa

Phone: 27-11-922-1600

Fax: 27-11-976-1706

Algeria, Tunisia, Middle East

Houghton S.A.S.

604, Boulevard Albert Camus

BP60041

69652 Villefranche sur Saone, France

Phone: 33-4-74-65-6500

Fax: 33-4-74-60-0844