ITEM | STANDARD | |||||
Appellation | White powder | White Acicular | ||||
Active matter | ≥92 | ≥93 | ≥95 | ≥92 | ≥93 | ≥95 |
Soluble in petroleum ethe | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
NaCl+Na2SO4 | ≤5.5 | ≤4.5 | ≤2.5 | ≤4.5 | ≤3.5 | ≤2.5 |
Moisture | ≤2.5 | ≤2.5 | ≤2.5 | ≤3.5 | ≤3.5 | ≤3.0 |
PH (1%) | 7.5~9.5 | 7.5~9.5 | 7.5~9.5 | 7.5~9.5 | 7.5~9.5 | 7.5~9.5 |
whiteness | ≥90 | ≥90 | ≥90 | ≥90 | ≥90 | ≥90 |
Hazen | - | - | - | - | - | - |