Sodium fluoride

Soluble in water (solubility 10°C 3.66, 20°C 4.06, 30°C 4.22, 40°C 4.4, 60°C 4.68, 80°C 4.89, 100°C 5.08), hydrofluoric acid, slightly soluble in alcohol .The aqueous solution is weakly alkaline and dissolves in hydrofluoric acid to form sodium bifluoride, which can corrode glass.poisonous!

Basic information

Traits

Colorless cubic or tetragonal crystals.Sensitive to moisture.Solubility in water (g/100ml): 4 at 15°C, 4.3 at 25°C, 5 at 100°C, insoluble in ethanol.The partial hydrolysis of the aqueous solution is an alkaline reaction.The pH of the freshly prepared saturated solution was 7.4.Its aqueous solution can make glass hairy, but its dry crystals or powder can be stored in glass bottles.Relative density 2.78.Melting point 993 ℃.Boiling point 1695 ℃.Moderately toxic, the median lethal dose (rat, oral) is 0.18g/kg.There is a strong stimulation.

Store

Store tightly sealed.

First aid measures

Sealed package and stored in dry and ventilated place

Accidental ingestion: drink warm water, induce vomiting and gastric lavage

Fire Fighting: Use plenty of water to put out fire.

The main purpose

Steel Analysis.Photoelectric colorimetric determination of phosphorus.Scandium was determined by spot analysis.blood test.masking agent.Flux.It is used as a phosphating accelerator in the coating industry to stabilize the phosphating solution, refine the phosphating, and improve the performance of the phosphating film.In the phosphating of aluminum and its alloys, Al3+, which has a very harmful negative catalytic effect, is blocked, so that the phosphating can be successfully carried out. Wood preservatives, agricultural insecticides, brewing agents, pharmaceutical preservatives, welding fluxes, alkaline zinc acid Salt galvanizing additives and enamel, paper industry, etc.

Health hazard

Routes of entry: inhalation, ingestion.

Health Hazards: Acute Poisoning: Mostly due to ingestion.Severe nausea, vomiting, ~, and diarrhea occurred immediately after taking it.Severe shock, dyspnea, cyanosis.May die within 2 to 4 hours.Some patients develop urticaria, paralysis of the swallowing muscles, tetany, or muscle spasms in the limbs.

Sodium fluoride dust and vapor are irritating and can cause dermatitis.

Chronic Effects: Can cause skeletal fluorosis.