Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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1,1-Difluoroethane(75-37-6)

Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information
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Product Identification

Product Name

1,1-Difluoroethane

Synonyms

1,1-Difluoroethane
Ethylidene difluoride
Freon 152a

CAS

75-37-6

Formula

C2H4F2

Molecular Weight

66.05

EINECS

200-866-1

RTECS

KI1410000

RTECS Class

Mutagen

Beilstein/Gmelin

1696900

Beilstein Reference

4-01-00-00120

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Physical and Chemical Properties

Appearance

Colorless odorless gas.

Solubility in water

17 g/L

Melting Point

-117

Boiling Point

-25

Vapor Pressure

4100 (25 C)

Density

0.6446 g/cm3 (97 C)

Partition Coefficient

.75

Heat Of Vaporization

21.9 kJ/mol

Usage

In use as a refrigerant, it has a low global warming potential, and has recently been approved for use in automobile applications as an alternative to r-134a. It is also commonly found in electronic cleaning products, and many consumer aerosol products that must meet stringent voc requirements.

Vapor Density

2.3

Refractive Index

1.3011 (-72 C)

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First Aid Measures

Ingestion

These substances may cause frostbite to the upper airway and gastrointestinal tract after ingestion. Administer oxygen and manage airway as clinically indicated. Emesis, activated charcoal, and gastric lavage are not recommended.

Inhalation

Provide a quiet calm atmosphere to prevent adrenaline surge if the patient is seen before the onset of cardiac arrhythmias. Minimize physical exertion.

Skin

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. If frostbite has occurred, refer to dermal treatment in the main body of this document for rewarming.

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. Ophthamologic consultation should be obtained in any symptomatic patients.

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Handling and Storage

Storage

Avoid heat, flames, sparks and other sources of ignition. Keep separated from incompatible substances.

Handling

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

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Hazards Identification

Inhalation

Pulmonary irritation, bronchial constriction, cough, dyspnea, and chest tightness may develop after inhalation. Chronic pulmonary hyperreactivity may occur. Adult respiratory distress syndrome has been reported following acute inhalational exposures. Pulmonary edema is an autopsy finding in fatal cases.

Skin

Dermal contact may result in defatting, irritation or contact dermatitis. Severe frostbite has been reported as an effect of freon exposure. Injection causes transient pain, erythema and edema.

Eyes

EYES - Eye irritation occurs with ambient exposure. Frostbite of the lids may be severe. NOSE - Nasal irritation occurs with ambient exposure. THROAT - Irritation occurs. Frostbite of the lips, tongue, buccal mucosa and hard palate developed in a man after deliberate inhalation.

Ingestion

Nausea may develop. Ingestion of a small amount of trichlorofluoromethane resulted in necrosis and perforation of the stomach in one patient.

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.

UN (DOT)

1030

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Exposure Controls/Personal Protection

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 (SCBA).

Exposure Effects

Headache, dizziness, and disorientation are common. Cerebral edema may be found on autopsy. Dichlorodifluoromethane was not teratogenic in rats and rabbits. <br>The reproductive effects of 1,1,1,2-tetrafluoroethane were studied in rats. No adverse effects on reproductive performance was noted or on the development, maturation or reproductive performance of up to two successive generations.

Exposure limit(s)

1000 ppm AIHA recommended TWA

Poison Class

5

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Fire Fighting Measures

Flash Point

-81

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.

Upper exp. limit

18

Lower exp. limit

3.7

Fire Potential

EXTREMELY FLAMMABLE.

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Accidental Release Measures

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.

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Stability and Reactivity

Incompatibilities

Incompatible with strong oxidizing and reducing agents Incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.

Stability

Stable at normal temperatures and pressure.

Decomposition

Hydrogen fluoride.

Combustion Products

Irritating hydrogen fluoride fumes may form in fire.

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Transport Information

UN Number

1030

Hazard Class

2.1