Description of grades
CR-42 USP/FCC 1 Technical sheet
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Physical Properties
|
|
Target |
Min. |
Max. |
| Specific Surface Area |
(m2 /g) |
9.0 |
8.0 |
10.0 |
| Mean Particle Size |
(um) |
0.26 |
0.23 |
0.29 |
| Bulk Density |
(lb./ft3) |
40 |
35 |
45 |
| Specific Gravity |
|
5.6 |
--- |
--- |
| Through 325 Mesh |
(%) |
--- |
99.98 |
100 |
Chemical Properties
|
|
Target |
Min. |
Max. |
| ZnO Assay |
(%) |
--- |
99.9 |
100 |
| Cadmium Content |
(ppm) |
--- |
0 |
3 |
| Copper Content |
(ppm) |
--- |
0 |
10 |
| Iron Content |
(ppm) |
--- |
0 |
10 |
| Lead Content |
(ppm) |
--- |
0 |
10 |
| Heat Loss @ 110°C |
(%) |
--- |
0 |
0.07 |
| Ignition Loss @ 825°C |
(%) |
--- |
0 |
0.2 |
CR-42 USP is produced to comply with the United States
Pharmacopeia requirements for zinc oxide