Items | Technical requirement | ||
best quality | first quality | qualifier | |
Appearance | colorless and transparent | ||
Density (?20), g/cm3 | 0.930~0.934 | 0.930~0.934 | 0.929~0.935 |
Free acid (as acetic acid), % ≤ | 0.005 | 0.010 | 0.020 |
Aldehyde (as acetaldehyde), % ≤ | 0.02 | 0.04 | 0.05 |
Dry residue, %≤ | 0.005 | 0.05 | 0.10 |
Water content, % ≤ | 0.04 | 0.10 | 0.20 |
Activity (second) (frothing time), second≤ | 660 | 690 | 720 |
Color(platinum-cobalt scale)≥ | 5 | 10 | 15 |
Purity, % = | 99.80 | 99.70 | - |
Boiling range (101.3kpa), °C | 71.0~73.5 | 71.0~73.5 | 71.0~73.5 |