Safe, natural food coloring from calcium carbonate, made from limestone. Calcium carbonate is a white natural alternative to Titanium Dioxide.  

Oterra | Food Coloring Manufacturer of calcium carbonate, made from limestone

Limestone is a sedimentary rock containing more than 50% calcium carbonate

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3 facts about Limestone

Oterra's stable, industry-leading formulations allow you to benefit from all of the advantages of calcium carbonate as a natural food color while minimizing any intrinsic challenges associated with this material.