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Propylene Glycol, with molecular formula C3H8O2 and structural formula , is colorless transparent liquid. Its melting point is -5 .
| Items | Units | Pharmaceutical Grade | Food Grade | First Grade | Qualified Grade |
| Purity | % | ≥99.8 | ≥99.6 | ≥99.5 | ≥99.0 |
| Water | % | ≤0.2 | ≤0.2 | ||
| Initial boiling point | 182 | 180 | |||
| Drying point | 189 | 191 | |||
| Distillation Range | 184~189 | 183~190 | 183~190 | 182~190 | |
| Color(Pt-Co) | 10 | 10 | 15 | 25 | |
| Ash | % | ≤0.01 | ≤0.01 | ≤0.01 | ≤0.02 |
| Heavy metalMeasured with Pb | ppm | 6 | 6 | ||
| Arsenic | ppm | 5 | 5 | ||
| sMeasured with Cl- | ppm | 10 | 10 | ||
| sMeasured with SO42- | ppm | 10 | 10 | ||
| Density | (25)g/cm3 | 1.037~1.039 | |||
| Appearance | Colorless, transparent and sticky liquid | ||||
Mono Propylene Glycol
