Molecular formula: NaF Molecular Weight: 41.99 
 Use: aluminum smelting and welding flux, medical and wood preservatives, brewing industry fungicides, agricultural pesticides, drinking water fluoridation agents for the paper industry, the production of toothpaste, chemical reagents, is also used to strip and stainless steel pickling, manufacture of other fluoride materials, adhesives, paper production, the production of elemental fluorine of HF. In addition, the enamel and the pharmaceutical industry. 
 Properties: colorless shiny crystals or white powder, the tetragonal symmetry, there are hexahedral or octahedral crystal, soluble in water, slightly soluble in alcohol, aqueous solution is an alkaline reaction, can corrode glass. Soluble in hydrofluoric acid to form hydrogen fluoride, sodium, toxic Corrosive to the skin, stimulate the mucous membrane. Against the nervous system. The proportion 1.02g/mL (20 ° C), melting point 993 ℃, boiling point 1700 ° C 
 CAS # :7681-49-4 
 Product specifications pharmaceutical grade / toothpaste grade reagent grade export level 
 Implementation of standards USP-34 USP-34 GB157-87 
 Content% 98.0-102.0 ≥ 98.5 ≥ 98.0 
 Water insoluble% ≤ 0.05 ≤ 0.01 ≤ 0.05 
 Organic volatile% compliance tested and found to comply with the test meets the test 
 Sulfate (SO4)% ≤ 0.005 ≤ 0.005 ≤ 0.03 
 Heavy metals% ≤ 0.003 ≤ 0.001 ≤ 0.003 
 Lead (Pb) ppm ≤ 10 ≤ 10 ≤ 10 
 Arsenic (As) ppm ≤ 2 ≤ 2 ≤ 2 
 Acidity (H +) mmol/100g ≤ 10 ≤ 10 ≤ 10 
 Alkalinity (OH-) mmol/100g ≤ 5 ≤ 5 ≤ 5 
 Chloride (Cl)% ≤ 0.012 ≤ 0.012 ≤ 0.012 
 Fluorosilicates (SiF6)% ≤ 0.001 ≤ 0.002 ≤ 0.6 
 Iron (Fe)% ≤ 0.001 ≤ 0.001 ≤ 0.005 
 PH (5% solution) 6.5-8.0 6.5-8.0 6.5-8.0 
 The control test 0.0005% 0.0002% 
 Appearance of the identification of white powder white powder white powder 
 Loss on drying (150 ° C / 4H)% ≤ 1.0 ≤ 0.2 ≤ 0.2 
 Whiteness (70-90um particle size)% ≥ 98 ≥ 95 ≥ 96 
 Transmittance (3% aqueous solution)% ≥ 98 ≥ 90 ≥ 90 
 Granularity (the USSCREEN 90%) of 30-100 mesh and 95% 20-150 mesh 20-150 mesh and 95%