Physical state at 20 °C | Liquid | Boiling point [°C] | 100°C |
pH value | Acidic | Density [g/cm3] | 1.03 |
Flash point [°C] | 39°C | Explosion limits -lower [%] | 4% |
Vapour density | 2.07 | Auto-ignition temperature [°C] | 427°C |
Explosion limits – upper [%] | 19.90% | Vapour pressure [20°C] | 2.3 kPa (@ 20°C) |
Colour | Dark Brown red | Solubility in water [% weight] | Soluble in water |
Melting point/ Freezing point [°C] | 16.6°C | Odour threshold | 1.018 ppm |
Appearance | Dark brown red solution |
Absorption maxima in 0.1 N NaOH | 576 – 582 nm |