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Sigma Chemical Company

For profit

Phase 1 Phase 2 Phase 3 Phase 4

Acquired by Sigma-Aldrich → Merck KGaA → Merck Serono on Jan 1, 1975

Timeline

1930s

Jan 1, 1935
Sigma Chemical Company— Founded

1970s

Jan 1, 1975
Sigma-Aldrich— Acquired By

2000s

Jan 1, 2006
Merck Serono— Now

Details

Founded: St Louis, MO, US Jan 1, 1935