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【Molecular formula】: NH4F
【Molecular weight】: 37.04
【Property】: White crystal, poisonous and erosive to skin. Easy to dissolve in water and carbinol and hard in ethanol, not dissolve to acet and liquid ammonia. It decomposes to ammonia and ammonium hydrogen difluoride in hot water.
【Technical index】:(%)
Name |
Index |
(NH4F)≥ |
98.0 |
residue of roasting≤ |
0.2 |
free acid (HF)≤ |
1.0 |
free alkali(NH4OH) |
Qualified |
Silicate(SiO2)≤ |
0.5 |
(Fe)≤ |
0.01 |
Heavy Metal(Cu)≤ |
0.006 |
【Use】: Used for extraction of rare element and engraved glass. It is used as antiseptic and disinfector for wood and vintage, as mordant and experion for fibre.
【Storage】: To be kept in cool and ventilated place to avoid getting wet.
【Packing】:Plastic woven sack with plastic double-layer inside,25KG/bag