Difluoromethane(75-10-5)

Product Name
Difluoromethane

Synonyms
4(1H)-Pyrimidinone, 6-hydroxy-5-nitro-
4,6-Dihydroxy-5-nitropyrimidine
5-Nitro-4,6-pyrimidinediol
6-Hydroxy-5-nitro-3H-pyrimidin-4-one
Carbon fluoride hydride
Freon 32
Genetron 32
Khladon 32
Methylene difluoride
R 32

CAS
2164-83-2

CAS
75-10-5

Formula
C4H3N3O4

Formula
CH2F2

Molecular Weight
52.03

Molecular Weight
157.08000000000001

EINECS
200-839-4

EINECS
218-504-6

RTECS
PA8537500

RTECS Class
Reproductive Effector

Beilstein/Gmelin
611622

Beilstein/Gmelin
1730795

Beilstein Reference
0-01-00-00059

Appearance
Colorless, odorless gas. Usually packaged in steel cylinders.

Appearance
Yellow or green - grey crystalline powder.

Solubility in water
4.4 g/L

Melting Point
-136

Melting Point
300

Boiling Point
-51.7

Vapor Pressure
13200 (25 C)

Density
1.1 g/cm3 (20 C)

Partition Coefficient
2.02

Heat Of Vaporization
19.2 kj/mol

Usage
Refrigerant gas.

Vapor Density
1.8

Ingestion
Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. Wash mouth out with water.

Ingestion
Seek medical assistance.

Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Inhalation
Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.

Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.

Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Skin
Remove and isolate contaminated clothing and shoes. Clothing frozen to the skin should be thawed before being removed. In case of contact with liquefied gas, thaw frosted parts with lukewarm water

Skin
Causes skin irritation.

Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Eyes
Flush with running water for at least 20 minutes.

Eyes
Causes eye irritation.

Storage
Grounding and bonding required. Store in a tightly closed container. Store below 49 C. Store in a cool, dry place. Store in a well-ventilated area. Keep separated from incompatible substances.

Storage
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling
Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Wash clothing before reuse.

Handling
Handle in accordance with all current regulations and standards. Subject to storage regulations: U.S. OSHA 29 CFR 1910.101. Grounding and bonding required.

Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.

Inhalation
Vapors may cause dizziness or asphyxiation without warning. Some may be irritating if inhaled at high concentrations.

Skin
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.

Eyes
May cause irritation.

Ingestion
Frostbite.

Hazards
Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Containers may explode when heated. Ruptured cylinders may rocket.

EC Risk Phrase
R 12

EC Risk Phrase
R 36/37/38

EC Safety Phrase
S 16 23

EC Safety Phrase
S 26 36

UN (DOT)
3252

Personal 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.

Personal Protection
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.

Respirators
Wear positive pressure self-contained breathing apparatus.

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.

Exposure Effects
The toxological properties of this substance have not been fully investigated.

Exposure limit(s)
1000 ppm AIHA recommended TWA

Poison Class
-

Flash Point
-89

Fire Fighting
DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED. SMALL FIRES: Dry chemical or carbon dioxide. LARGE FIRES: Water spray or fog. Move containers from fire area if you can do it without risk. FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Do not direct water at source of leak or safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

Fire Fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.

Upper exp. limit
27.2

Fire Potential
EXTREMELY FLAMMABLE.

Small spills/leaks
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. If possible, turn leaking containers so that gas escapes rather than liquid. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Do not direct water at spill or source of leak. Prevent spreading of vapors through sewers, ventilation systems and confined areas. Isolate area until gas has dispersed. CAUTION: When in contact with refrigerated/cryogenic liquids, many materials become brittle and are likely to break without warning.

Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.

Incompatibilities
Oxidizing agents.

Stability
Stable at normal temperatures and pressure.

Stability
Stable at room temperature in closed containers under normal storage and handling conditions.

Incompatibilities
Can react with some metals to form dangerous products May react violently with aluminum Incompatible with strong oxidizing and reducing agents Incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.

Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Decomposition
Thermal decomposition products: oxides of carbon, carbon halides, hydrogen fluoride

UN Number
3252

Hazard Class
2.1