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