Propylene Glycol (C3H8O2, CAS 57-55-6) is a clear, odorless, slightly viscous liquid with a specific gravity of about 1.036, a boiling point of 370°F (188°C) and low toxicity. USP grade is used in foods, pharmaceuticals and cosmetics, and industrial grades are used as food-safe antifreeze, heat transfer fluid, aircraft deicer and in polyester resins. Propylene glycol storage is straightforward, with food-grade tanks for USP service. Use the compatibility ratings to choose the right tank resin, fittings and gaskets.
Safety data: Propylene Glycol USP Safety Data Sheet (SDS) – BASF
HDPE is the most economical tank material for Propylene Glycol, rated Excellent. Polypropylene and nylon are also rated Good or better. Rated Fair (contact us before use): PVC and CPVC fittings.
How Propylene Glycol works with the plastics used to make our storage tanks.
| Material | Rating |
|---|---|
| HDPE | |
| Polypropylene | |
| Nylon | |
| PVDF (Kynar®) |
How Propylene Glycol works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | |
| PVC | |
| CPVC | |
| Polypropylene | |
| PVDF |
How Propylene Glycol works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | |
| EPDM | |
| Viton® |
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