|
Item
|
Standard
|
NH7330
|
NH9330
|
|
Fe3O4 ,%≥
|
95
|
95
|
95
|
|
Color (compared with reference standard)
|
approx. equivalent
|
approx. equivalent
|
approx. equivalent
|
|
Coloring power(compared with reference standard)
|
100±5
|
98-105
|
98-105
|
|
Volatile (105ºC)≤
|
1.5
|
1.0
|
0.5
|
|
Water soluble substances (%)≤
|
0.5
|
0.5
|
0.3
|
|
pH of water extract
|
5-8
|
5-8
|
5-8
|
|
Oil absorption (g/100g)
|
15~25
|
≤25
|
≤22
|
|
Residue on sieve 45μm(%)≤
|
0.3
|
0.10
|
0.10
|