Open Access
Table 2
Properties of Span 80 and Tween 80.
| Span 80 | Tween 80 | ||
|---|---|---|---|
| Saponification value | 142–189 | Boiling point | >100 °C (1013 hPa) |
| Acid value | max. 10 | Density | 1.06–1.09 g/cm3 (25 °C) |
| Specific gravity (20/20) | 0.99 | Flash point | >113 °C |
| Refractive index | 1.48 | pH value | 5–7 (50 g/L, H2O, 20 °C) |
| Vapor pressure | <1.33 hPa (20 °C) | ||
| Kinematic viscosity | 300–500 mm2/s (25 °C) | ||
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