Magnesium Chloride (31%) (MgCl2, CAS 7786-30-3) brine is a clear to light amber liquid with a specific gravity of about 1.29 to 1.38, often harvested from the Great Salt Lake. It is used for road deicing and anti-icing, dust control on unpaved roads, as a magnesium source in agriculture and supplements, and in oxychloride cements. Liquid magnesium chloride storage tanks should be agitated occasionally to limit settling. Use the compatibility ratings to choose the right tank resin, fittings and gaskets.
Safety data: Magnesium Chloride Safety Data Sheet (SDS) – Compass Minerals
HDPE is the most economical tank material for Magnesium Chloride (31%), rated Excellent. Polypropylene, nylon and PVDF (Kynar®) are also rated Good or better. Avoid 316 stainless steel and aluminum hardware.
How Magnesium Chloride (31%) works with the plastics used to make our storage tanks.
| Material | Rating |
|---|---|
| HDPE | |
| Polypropylene | |
| Nylon | |
| PVDF (Kynar®) |
How Magnesium Chloride (31%) works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | |
| PVC | |
| CPVC | |
| Polypropylene | |
| PVDF |
How Magnesium Chloride (31%) works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | |
| EPDM | |
| Viton® |
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