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A7311512

Sodium fluoride , PT , 7681-49-4

Synonym(s):
Sodium fluoride;Sodium fluoride solution;Sodium monofluoride;Sodium monofluoride (NaF);Disodium Fluoride

CAS NO.:7681-49-4

Empirical Formula: FNa

Molecular Weight: 41.99

MDL number: MFCD00003524

EINECS: 231-667-8

Update time: 2022-07-08

PRODUCT Properties

Melting point: 993 °C (lit.)
Boiling point: 1700 °C
Density  1.02 g/mL at 20 °C
vapor pressure  1.4 mm Hg ( 0 °C)
refractive index  1.336
Flash point: 1704°C
storage temp.  2-8°C
solubility  H2O: 0.5 M at 20 °C, clear, colorless
form  powder
Specific Gravity 2.558
color  White to off-white
Odor Odorless
PH 7.0-10.0 (25℃, 0.5M in H2O)
Water Solubility  4 g/100 mL (25 ºC)
Sensitive  Hygroscopic
Crystal Structure NaCl type
crystal system Cube
Merck  14,8618
Space group Fm3m
Lattice constant
a/nmb/nmc/nmα/oβ/oγ/oV/nm3
0.46330.46330.46339090900.09945

Exposure limits ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
Stability: Stable. Hydrolyzed by water. Reacts with mineral acids to generate highly toxic hydrogen fluoride. Incompatible with glass.

Description and Uses

Sodium fluoride, NaF, is a binary salt that is a clear, lustrous crystal or white powder. The insecticide grade is frequently dyed blue. It is soluble in water and has a specific gravity of 2.558, which is heavier than water. Sodium fluoride is highly toxic by ingestion and inhalation, and is also strongly irritating to tissue. The TLV is 2.5 mg/m3 of air. The four-digit UN identification number is 1690. The primary uses are fluoridation of municipal water at 1 ppm, as an insecticide, rodenticide, and fungicide, and in toothpastes and disinfectants.

Sodium fluoride, formed by reaction of sodium carbonate and hydrofluoric acid, and then evaporating. Used (1) as an antiseptic and antifermentative in alcohol distilleries, (2) as a food preservative, (3) as a poison for rats and roaches, (4) as a constituent of ceramic enamels and fluxes; sodium hydrogen fluoride, sodium difluoride, sodium acid fluoride, NaHF2, white solid, soluble, formed by reaction of sodium carbonate and excess hydrofluoric acid, and then evaporating. Used (1) as an antiseptic, (2) for etching glass, (3) as a food preservative, (4) for preserving zoological specimens.

Safety

Symbol(GHS) 
GHS06
Signal word  Danger
Hazard statements  H301-H315-H319
Precautionary statements  P264-P270-P280-P301+P310-P302+P352-P305+P351+P338
Hazard Codes  T,Xn
Risk Statements  25-32-36/38-22
Safety Statements  23-24/25-45-36-22
RIDADR  UN 1690 6.1/PG 3
OEB B
OEL TWA: 2.5 mg/m3 [*Note: The REL also applies to other inorganic, solid fluorides (as F).]
WGK Germany  1
RTECS  WB0350000
10
Hazard Note  Toxic/Hygroscopic
TSCA  Yes
HS Code  2826 19 10
HazardClass  6.1
PackingGroup  III
Toxicity LD50 orally in rats: 0.18 g/kg (Smyth)

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