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Diphenyl ether, which is a colorless crystal at room temperature, has aroma of geranium oil, insoluble in water, soluble in organic solvents such as alcohol, ether, acetic acid, benzene, etc., crystallization point is 26.7 ° C, boiling point 259 ° C, flash point 115 ° C, relative density of 1.086 (20 ° C).
| Indicator name | index | ||
| Superior grade | First grade | Qualified product | |
| Chromaticity(platinum-cobalt) ≤ | 20 | 30 | 50 |
| Crystallization point °C %≥ | 26.7 | 26.6 | 26.5 |
| Moisture% ≤ | 0.03 | 0.04 | 0.05 |
| Diphenyl ether content% %≥ | 99.9 | 99.5 | 99 |
| Phenol content% ≤ | 0.005 | 0.01 | 0.02 |
| Total sulfur mg/kg ≤ | 5 | 8 | 10 |
| Total chlorine mg/kg ≤ | 8 | 20 | 40 |
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