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Executive standard: GB/T1276-1999 |
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Item |
Index |
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Guaranteed reagent |
Analytical grade |
Chemical pure |
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Content (NH4F) ％≥ |
96.0 |
96.0 |
95.0 |
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Clarity test |
Qualified |
Qualified |
Qualified |
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Ignition residue (Sulfate) ％≤ |
0.005 |
0.02 |
0.05 |
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Free acid (NH4HF2) ％≤ |
0.2 |
0.5 |
1.0 |
|
Free alkali |
Qualified |
Qualified |
Qualified |
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Fluoride (Cl) ％≤ |
0.0005 |
0.005 |
0.01 |
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Sulfate (SO4), ％≤ |
0.005 |
0.01 |
0.02 |
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Fluosilicate， ％ ≤ |
0.08 |
0.30 |
0.60 |
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Iron (Fe), ％ ≤ |
0.0005 |
0.002 |
0.004 |
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Heavy metal (Pb), ％ ≤ |
0.0005 |
0.001 |
0.002 |
Fujian Shaowu Yongfei Chemical Co., Ltd.
Add: No. 18, Xin' an Road, Shaowu City, Fujian Province, China
Foreign Trade Department Tel: +86-599-6655932/6654968 Fax: +86-599-6654591
Domestic Trade Department Tel: +86-599-6654866/6654968 Fax: +86-599-6655755
High Purity Chemical Product Department Tel: +86-599-6655536/6654968 Fax: +86-599-6655755