Sodium Fluoride

Sodium fluoride, is a kind of inorganic compound, the chemical formula is NaF, mainly used in the coating industry as phosphating accelerator, agricultural insecticide, sealing materials, preservatives and other fields.

Physical Properties:Relative density is 2.558 (41/4 ° C), the melting point is 993 ° C, and the boiling point is 1695 ° C [1]. (Relative density 2.79, melting point 992 ° C, boiling point 1704 ° C [3]) Soluble in water (15 ° C, 4.0g/100g; 25 ° C, 4.3g/100gchemicalbook), soluble in hydrofluoric acid, and insoluble in ethanol. The aqueous solution is alkaline (pH = 7.4). Toxic (damage nervous system), LD50180mg/kg (mice, oral), 5-10 grams to death. Properties: colorless or even white crystalline powder, or cubic crystals, fine crystals, without odor.

Chemical properties: colorless shiny crystal or white powder, tetragonal system, with regular hexahedral or octahedral crystals. Slightly soluble in alcohol; Soluble in water, aqueous solution is acidic, soluble in hydrofluoric acid to form sodium hydrogen fluoride.

Application:

1. It can be used as high -carbon steel, such as an air -proof agent of boiling steel, an aluminum electrolytic or electrolytic refined melting agent, waterproof treatment of paper, wood preservatives (with sodium fluoride and nitrate or diitol phenol For anti -corrosion of the base material), use materials (drinking water, toothpaste, etc.), sterilizers, insecticides, preservatives, etc.

2. It is used to prevent dental caries and oral caries in the lack of fluoride in the water in the water in the water;

3. Small doses are mainly used for osteoporosis and paget bone disease;

4. It can be used as the raw material or fluoride absorbent of other fluoride or fluoride;

5. It can be used as a UF3 adsorbent in light metal fluorine salt treatment agents, smelting refiners, and nuclear industries;

6. Washing solution of steel and other metals, welded agents and welds;

7. Ceramics, glass and enamel melts and shading agents, raw skin and epidermal treatment agents of the tone industry;

8. Make phosphate promoters in the surface treatment of black metal to stabilize the phosphorurative solution and improve the performance of phosphorus membrane;

9. As a additive in the production of sealing materials and brake pads, it plays a role in increased wear resistance;

10. As additives in concrete, enhance the corrosion resistance of concrete.

Precautions:

1. Use sodium fluoride to strictly control the amount of fluorine daily to prevent the production of fluoride poisoning;

2. Sodium fluoride solution or gel should be placed in a plastic container;

3. Patients, pregnant women, lactating women, bone softness and renal failure in high -fluoride areas are prohibited.

Packing and storage

Packaging method: plastic bags or two -layer cowhide paper bag outer fiber board barrels, plywood barrels, hard paper board barrels; plastic barrels (solid) outside plastic bags; plastic barrels (liquid); two layers of plastic bags or one -layer plastic bag outside sacks, plastic weaving weaving, plastic weaving weaving Bags, latex bags; plastic bag composite plastic woven bags (polypropylene three -in -one bags, polyethylene triple bags, polypropylene two -in -one bags, polyethylene two -in -one bag); plastic bags or two -layer leather paper bags outside Ordinary wooden box; thread glass bottle, iron cover press glass bottle, plastic bottle or metal barrel (can) ordinary wooden box; thread glass bottle, plastic bottle or tin -plated thin steel plate barrel (can) Box, fiberboard box or plywood box.Product packaging: 25kg/bag.

Precautions for storage and transportation: During railway transportation, the dangerous cargo assembly table should be installed in strict accordance with the Railway Ministry of Railways’ Dangerous Cargo Transportation Rules. Before transportation, check whether the packaging container is complete and sealed. During the transportation, it should ensure that the container should not leak, collapse, fall, or damage. It is strictly forbidden to mix with acid, oxidant, food and food additives. During transportation, transport vehicles should be equipped with leakage emergency treatment equipment. During transportation, sun exposure and rain should be exposed to prevent high temperature. Store in a cool, dry, and ventilated warehouse. The library temperature does not exceed 30 ° C, and the relative humidity does not exceed 80%. Packing and sealed. Store separately from acid and edible chemicals, avoid mixing. The storage area shall have the appropriate material to contain the leakage. Strictly implement the “five doubles” management system of poisonous items.