Martin Marietta Magnesia Specialties LLC

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Based in Baltimore, MD. Martin Marietta Magnesia Specialties LLC is a producer of industrial minerals products. It is a wholly owned subsidiary of Martin Marietta Materials Inc and its products are used in many industrial as well as agricultural applications.


  • 8140 Corporate Drive, Suite 220  

Town, State, Country

  • Baltimore, MD, United States  


  • 21236 
  • President John R. Harman
  • End User Industries Water treatment, steelmaking, leather, ceramics, rubber, refractory, glass, drilling, plastic, agriculture and food
  • Export Markets Canada, Mexico


  • ISO 9001


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