ITEM
|
UNIT
|
Standard
|
Appearance
|
|
White Solid Powder
|
volatilization
|
wt%
|
≤0.2
|
Ash
|
wt%
|
≤0.10
|
Melting Point
|
ºC
|
50.0~55.0
|
Purity
|
wt%
|
≥98.0
|
Transmittance
|
%
|
425nm ≥97.0
|
%
|
500nm ≥97.0
|