Oxygen difluoride

  • Fuorine monoxide
  • Fluorine oxide
Formula
OF2
Structure
Description
A colorless poisonous gas with a strong peculiar odor.
Uses
Oxidizer in rocket fuel systems.

Registry Numbers and Inventories.
CAS
7783-41-7
EC (EINECS/ELINCS)
231-996-7
RTECS
RS2100000
RTECS class
Human Data
UN (DOT)
2190
Merck
12,4201
Beilstein/Gmelin
1054 (G)
Swiss Giftliste 1
G-5327

Properties.
Formula
F2O
Formula mass
53.99
Melting point, °C
-223.9
Boiling point, °C
-145
Vapor density (air=1)
1.8
Odor Threshold Odor threshold 1.0 mg/m3
Density
1.90 g/cm3 (-224 C)
Solubility in water
200 mg/L

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Attempt to stop leak if without undue personnel hazard. Do not use water.
Stability
Gas may be kept over water unchanged for a month.
Incompatibilities
Mixtures with carbon monoxide, with hydrogen, or with methane explode on sparking May react explosively with adsorbents (silica, alumina, molecular sieves, silica gel) Incompatible with ammonia, arsenic trioxide, chromium trioxide, chlorine in the presence of copper, ozone Reacts to incandescence with aluminum, barium, cadmium, magnesium, strontium, zinc, zirconium Reacts with the alkali metals (lithium, sodium, potassium).
Decomposition
When heated to decomposition, it emits highly toxic fumes of hydrogen fluoride.

Fire.
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Keep run-off water out of sewers and water sources. Do not use water on material itself. Do not apply water to point of leak in tank car or container.
Fire potential
Substance does not burn but will support combustion.
Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. These are strong oxidizers and will react vigorously or explosivelywith many materials including fuels. May ignite combustibles (wood, paper, oil, clothing, etc.). Some will react violently with air, moist air and/or water. Containers may explode when heated. Ruptured cylinders may rocket.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV: 0.05 ppm; 0.11 mg/m3 (as CEILING) (ACGIH 1991-1992). OSHA PEL: TWA 0.05 ppm (0.1 mg/m3) NIOSH REL: C 0.05 ppm (0.1 mg/m3) NIOSH IDLH: 0.5 ppm
Poison_Class
1
Exposure effects
Drowsiness, muscular weakness, and headache have been reported. No data were available to assess the teratogenic potential of this agent. <br>No data were available to assess the potential effects of exposure to this agent during pregnancy or lactation.
   Ingestion
Vomiting may occur.
   Inhalation
Oxygen difluoride is highly irritating to the respiratory tract. Pulmonary edema, congestion, or lung tissue damage may occur.
   Skin
It is a corrosive skin irritant. Although there are no human case reports, it is expected that this gas, under pressure, would cause serious burns.
   Eyes
Tearing may occur. Although no cases have been reported, the gas would be expected to cause serious burns to the eyes.

First aid
 
   Ingestion
Because oxygen difluoride is a gas, there is little to no risk of ingestion exposure. Treatment should include recommendations listed in the inhalation exposure section when appropriate.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Effects may be delayed.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water. Effects may be delayed.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
2190
Response guide
Hazard class
2.3
PRTC
T
Std. Transport #
4920173