Sigma-Aldrich is an American chemical, life science, and biotechnology company owned by the multinational chemical conglomerate Merck Group.
Sigma-Aldrich was created in 1975 by the merger of Sigma Chemical Company and Aldrich Chemical Company. Wikipedia
Customer service: 1 (800) 325-3010
Headquarters: St. Louis, MO
Founded: August 1975
Number of employees: more than 20,000
Traded as: Nasdaq: SIAL
Parent organization: Merck Group