What is Diatomaceous Earth?
Diatomaceous Earth is a fossilized deposit of microscopic shells created by one celled plants called Diatoms. These plants inhabit all the waters of the earth, and serve as the basic food for aquatic life, just as grass is the basic food for land animals.
What is Codex or "Food Grade" Diatomaceous Earth?
For Diatomaceous Earth to be called "Codex," it must meet the following requirements:
|"Codex" Diatomaceous Earth must meet these requirements|
|Arsenic (ppm)||not more than 10 ppm||<10|
|Lead (ppm)||not more than 10 ppm||<10|
|Non-Siliceous Substance %||not more than 25% on dried basis||11.0%|
|Loss on Drying %||natural powders not more than 10%||6.2|
|Loss on Ignition||natural powders not more than 7%
on the dried basis
For additional information, see the Analysis of Fossil Shell Flour.
Perma-Guard diatomaceous earth magnified 7,000 times