SPEC

Electronic grade

Export grade

Technical grade

ITEMS

Yotech Standard

Yotech Standard

HG/T2829-1997

assay                ％

≥99.5％

≥99.5％

≥99％

Cl          ％

≤0.005％

≤0.005％

≤0.05％

SO₄^2-        ％

≤0.02％

≤0.02％

≤0.05％

Fe              ％

≤0.0002％

≤0.002％

≤0.003％

Heavy  metal        ％

Fe/Na/Cd/Ca/Si/Mg/Al/B

/Pb/Cr/Cu/Mn/Ni/Mo/Sn

/Ti/W/Hg/As

≤0.0001％

Hg/As  not found

≤0.002％

≤0.003％

HF          ％

≤0.05％

≤0.05％

≤0.1％

K₂CO₃       ％

≤0.05％

≤0.05％

≤0.1％

K₂SiF₆     ％

≤0.02％

≤0.02％

≤0.02％

Middle Control Item

White  gree      ％

85％

80％

80％

Loss on drying       ％

≤0.2％

≤0.2％

≤0.3％

Permeation rate     15％

98.5％

98％

95％

Particle size (micron)

60-120 pass 95％

325 psaa 99.5％

20-220目

Store  period         

Two years

One year

One year

Provide reference

Produce technics

99.9％HF produced

KOH produced

Technical KOHcomposed

Packing

25kg five-storys PE bag

25kg five-storys PE bag

25kg three-storys PE bag