Sodium fluoride

  • Sodium monofluoride
Formula
NaF
Structure
Description
White powder or colorless crystals, odorless. Pesticide grade is often dyed blue.
Uses
In electroplating, in heat treating salt compositions, for disinfecting fermentation apparatus in breweries and distilleries, manufacture coated paper, frosting glass, in dental lab, in removal of hydrogen fluoride from exhaust gases to reduce air pollution.

Registry Numbers and Inventories.
CAS
7681-49-4
EC (EINECS/ELINCS)
231-667-8
EC Index Number
009-004-00-7
EC Class
Toxic; Irritant; Contact with acids liberates very toxic gas
R 25 32 36/38
S 22 36 45
RTECS
WB0350000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Drug; Mutagen; Reproductive Effector; Human Data; Primary Irritant
UN (DOT)
1690
Merck
12,8762
Beilstein/Gmelin
13587 (G)
EPA OPP
75202
Swiss Giftliste 1
G-2066
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
FNa
Formula mass
41.99
Melting point, °C
993
Boiling point, °C
1700
Vapor pressure, mmHg
8.938 (1227 C)
Vapor density (air=1)
1.45
Saturation Concentration
Nearly zero
Odor Threshold Odor threshold Odorless
Density
2.558 g/cm3 (14.5 C)
Solubility in water
43 g/L
Viscosity
1.05 cp (1160 C)
Thermal expansion
0.0000332/K
Heat of fusion
32.71 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep away from strong acids. Store protected from moisture. Store away from alkalies.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Do not allow contact with water. Discard contaminated shoes. Keep from contact with moist air and steam.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Do not flush into a sewer. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation. Do not get water inside containers.
Disposal code
23
Stability
Stable under normal temperatures and pressures. Moisture sensitive.
Incompatibilities
Moisture, acids, alkalies, glass, oxidizing agents.
Decomposition
Irritating and toxic fumes and gases, hydrogen fluoride, sodium oxide.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Material will not burn. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use extinguishing media most appropriate for the surrounding fire. Do NOT get water inside containers. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
Combustion products
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL*: TWA 2.5 mg/m3 OSHA PEL*: TWA 2.5 mg/m3 [*Note: REL and PEL also apply to other inorganic, solid fluorides (as F).] IDLH 250 mg/m3 (as F)
Poison_Class
3
Exposure effects
Chronic inhalation and ingestion may cause fluorosis with skeletal abnormalities. May cause reproductive and fetal effects. Effects may be delayed. Chronic exposure may cause lung damage. Laboratory experiments have resulted in mutagenic effects. Chronic exposure to fluoride compounds may cause systemic toxicity. Skeletal effects may include bone brittleness, joint stiffness, teeth discoloration, tendon calcification, and osterosclerosis. Animal studies have reported the development of tumors.
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. Ingestion of large amounts of fluoride may include salivation, nausea, vomiting, abdominal pain, fever, labored breathing. Exposure to fluoride compounds can result in systemic toxic effects on the heart, liver, and kidneys. It may also deplete calcium levels in the body leading to hypocalcemia and death. May cause respiratory paralysis and cardiac arrest.
   Inhalation
Causes severe irritation of upper respiratory tract with coughing, burns, breathing difficulty, and possible coma. Causes chemical burns to the respiratory tract. Aspiration may lead to pulmonary edema. Prolonged exposure to dusts, vapors, or mists may result in the perforation of the nasal septum. May cause systemic effects.
   Skin
Contact with skin causes irritation and possible burns, especially if the skin is wet or moist. May cause skin rash (in milder cases), and cold and clammy skin with cyanosis or pale color.
   Eyes
Causes eye irritation and burns. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
1690
Response guide
Hazard class
6.1
Packing Group
III
 
USCG CHRIS Code
SDF
 
HS Code
2826 11 00
 
Std. Transport #
4925201 4925209