The following US Zinc grades are stocked by JMB :-
(limit values are in bold and underlined - other values are typical only)
|
|
Parameter
|
GRADE
|
|
AZO66
|
210
|
210 P
|
AZO77HSA
|
|
Classification
|
HIGH
PURITY
POWDER
|
GENERAL
PURPOSE
POWDER
|
GENERAL
PURPOSE
PELLETS
|
FINE
PARTICLE
POWDER
|
|
ZnO content %
(dry basis)
|
99.7 min
99.8
|
99.5 min
99.7
|
99.5 min
99.7
|
99.7 min
99.8
|
|
Lead content %
|
0.005 max
0.003
|
0.15 max
0.1
|
0.15 max
0.1
|
0.005 max
0.003
|
|
Cadmium content %
|
0.003 max
0.001
|
0.025 max
0.004
|
0.025 max
0.004
|
0.003 max
0.001
|
|
Copper content %
|
0.002 max
< 0.001
|
0.006 max
< 0.001
|
0.006 max
< 0.001
|
0.002 max
< 0.001
|
|
Iron content %
|
0.002 max
< 0.001
|
0.006 max
< 0.001
|
0.006 max
< 0.001
|
0.002 max
< 0.001
|
|
Particle surface area
(BET) m2 g-1
|
4.0 - 6.0
5
|
4.0 - 6.0
5
|
4.0 - 6.0
5
|
8.0 -10.0
9.0
|
|
Sieve residue %
(45 µm)
|
< 0.1
0.02
|
< 0.1
0.02
|
< 0.1
0.02
|
< 0.1
0.02
|
|
Moisture %
|
< 0.2
0.1
|
< 0.2
0.1
|
< 0.2
0.1
|
< 0.3
0.2
|
|
Bulk density §
(g cm-3)
|
0.32 - 0.64
0.48
|
0.32 - 0.64
0.48
|
0.8 - 1.4
1
|
0.32 - 0.64
0.48
|
|
§ converted from American density units
|
|
US Zinc also produces grade AZO66EP (powder form) which conforms to the current EP purity requirements.
Please note, however, that this material is not intended for use as an active pharmaceutical ingredient ("API")
|
|
Parameter
|
LIMITS
|
Typical
|
|
Zinc oxide content (%)
|
99 - 100.5
|
99.7
|
|
Lead content (ppm)
|
50
|
20
|
|
Cadmium content (ppm)
|
10
|
5
|
|
Iron content (ppm)
|
200
|
2
|
|
Arsenic content (ppm)
|
5
|
< 2
|
|
Carbonate & acid-insolubles
|
PASS
|
-
|
|
Alkalinity
|
PASS
|
-
|
|
Loss on ignition @ 500°C (%)
|
1
|
0.2
|
|
Particle surface area - BET (m2 g-1)
|
-
|
5
|
|
Sieve residue - 45µm (%)
|
-
|
< 0.01
|
|
Moisture loss @ 110°C (%)
|
-
|
0.1
|
|
Bulk density (g cm-3)
|
-
|
0.5
|
|
© James M. Brown Limited 2008
This page was last updated on 27th May 2008
