Propylene Glycol
Propylene glycol USP/EP is used as an excipient (non-active ingredient) in the manufacture of pharmaceutical products. It is also used as a humectant and emulsifier in the production of food and personal care products and in liquid laundry detergents.
| Analysis | Propylene glycol |
| Acidity as acetic acid, % | < 0.0020 |
| Test as PG, on a dry basis; % | > 99.90 |
| Chlorides, ppm | < 0.5 |
| Pt-Co Color, APHA Color | < 10 |
| Heavy metals such as Pb, ppm | < 5 |
| Iron, ppm | < 0.50 |
| Arsenic, ppm | < 1.0 |
| Diethylene glycol, % | < 0.008 |
| Ethylene glycol, % | < 0.008 |
| Water, % | < 0.2 |