【molecular formula】: ZnO
【molecular weight】: 81.37
【Product name】: medicine powder zinc oxide（direct method）。
【properties】: the features compared with the same products,
1.high purity, less injurant and can make functions well used
2.convenient to be mixed in equity during using because of small grain size.
3.low content of other elements: especially for plumbum,cadmium,Hg and other heavy metal and low content of arsenic and greatly cut untoward effect of eletronic materials.
4.zinc oxide and other ramifications can make strength of various bonds, concretion time,etc improved.
| medicine grade zinc oxide product index(percentage content） BG/T3185-92 |
Item |
first rate products |
qualification products |
zinc oxide（counted by dry products）≥ |
99.5 |
99.7 |
metal substance（counted by Zn） |
no |
no |
plumbum oxide（counted by Pb）≤ |
0.0005 |
0.0005 |
cadmium oxide（counted by Cd）≤ |
0.0001 |
0.0001 |
manganese oxide（counted by Mn）≤ |
0.001 |
0.001 |
cuprum oxide（counted by Cu）≤ |
0.0002 |
0.0002 |
muriatic acid undissolved substance≤ |
0.01 |
0.006 |
ignition loss≤ |
0.2 |
0.2 |
water soluble matter≤ |
0.1 |
0.1 |
residue on sieve（45micron mesh）≤ |
0.15 |
0.1 |
specific surface area（ m2/g）≥ |
65 |
65 |
|
