Appearance

white powder

Purity (%)

     ≥ 99

Moisture (%)

0.1

PH value

     7.59.5

Ash (%)

      ≤ 0.03

Formaldehyde water-soluble test: turbidity (kaolin degrees, degrees)  

       ≤ 20

Color (Ha Zen) units (PT-Co), platinum-cobalt color

       ≤ 20