Item |
Index |
appearance |
Colorless transparent liquid, no insoluble water and mechanical impurities |
Scope of distillation range ℃ |
79.6 ~ 80.5 |
density(20℃),kg/m3 |
0.876 ~ 0.881 |
content ≥ |
99.6% |
Crystallization point ℃ ≥ |
5 |
bromine number, g/100ml ≤ |
0.42 |
Carbon disulfide g/100ml ≤ |
0.07 |
Thiophene g/100ml ≤ |
0.1 |
water |
no insoluble water visible at room temperature (18 ~ 25 ℃) |
Acid colorimetric |
The acid layer is not darker than the standard solution containing 0.1g potassium dichromate in 1000mL dilute acid |
Neutral test |
Neutral |
Evaporation residue mg/100mL≤ |
5 |