From Claws Mail FAQ
Calcium Magnesium Acetate (CMA100) Product Information What is CMA100? CMA100 is a simple combination of dolomitic lime and acetic acid (a principal component of vinegar) and is produced at the manufacturing facility in Fort Madison, Iowa. It is noteworthy that CMA100 (calcium magnesium acetate) is manufactured in the US and held to high standards of quality control. Such standards can vary greatly in foreign material, thereby seriously compromising effectiveness. Why was CMA100 developed? There has long been a concern for damage to the environment and to structures like bridges and parking garages caused by the use of chloride deicers. In the 1970’s, the Federal Highway Administration (FHA) identified calcium magnesium acetate as the only low-corrosion chemical alternative to road salt that also protected the environment. Years of research and field applications have proven CMA is no more corrosive than tap water and does not harm vegetation or receiving waters. Today many engineering specifications for new structures, primarily parking garages, specify CMA100 (calcium magnesium acetate) be used. CMA100 is produced primarily for new concrete, less than 2 years old. For aged or cured concrete (2 years old or more), CMA40 or sodium acetate (NAAC) is recommended.