| Property | Value | |----------|-------| | Appearance | Clear to hazy amber liquid | | Odor | Mild, characteristic of phosphonates | | pH (concentrate) | 12.5 – 13.5 (strongly alkaline) | | pH (1% solution) | 10.0 – 11.0 | | Specific gravity | 1.15 – 1.25 g/cm³ @ 25°C | | Viscosity | 10 – 30 cP @ 25°C | | Solubility in water | Fully miscible | | Freezing point | ~ -5°C (23°F) | | Boiling point | > 100°C (212°F) |