Carbon tetrafluoride

88

88.00

200-896-5

94WG9QG0JN

0575

1982

DTXSID2041757

Colorless gas

0

1.8

Tetrafluoromethane is a colorless nonflammable gas. It is shipped as a liquid under pressure. It may be narcotic at high concentrations. Under prolonged exposure to fire or heat the containers may rupture violently and rocket. It is used as a refrigerant.

3.034 g/cm³ @ Temp: 25 °C

-183.6 °C

-127.8 °C

mL/100mL in H2O: 0.595 (10°C), 0.490 (20°C), 0.366 (40°C) [LAN05]

May be stored in steel cylinders.

1.75X10+5 mm Hg at 25 deg C /extrapolated/

3.04 (vs air)

Inhalation-Rat LCL0: 895000 PPM/15 points

Odorless

4.00e-16 cm3/molecule*sec

5.15 atm-m3/mole|Henry's Law constant = 5.15 atm-cu m/mole at 25 °C

Global Warming Potential (GWP): Chemical: PFC-14 (Perfluoromethane); GWP: 7,390 (100-Year Time Horizon)|Specific volume: 4.4 cu ft/lb at 70 °F|Thermally stable. Chemically very inert.|Critical volume: 133 cu cm/mol|For more Other Experimental Properties (Complete) data for Tetrafluoromethane (6 total), please visit the HSDB record page.

No rapid reaction with air. No rapid reaction with water.

Fluorinated Organic Compounds

The reaction of aluminum with various halogenated hydrocarbons produces a self-sustaining reaction with sufficient heat to melt aluminum pieces, examples of other halogenated hydrocarbons are fluorotrichloromethane, dichlorodifluoromethane, chlorodifluoromethane, tetrafluoromethane. The vigor of the reaction appears to be dependent on the combined degree of fluorination and the vapor pressure [Chem. Eng. News 39(27):44. 1961].

>/= 1100 °C|>1100 °C

The gas is heavier than air and may accumulate in lowered spaces causing a deficiency of oxygen.

Critical temperature: 299.00 K; critical pressure: 4.82 MPa

2.2

UN 1982 2.2

3

38

FG4920000

F

The warehouse is ventilated, low temperature and dry; stored separately from flammable materials

Non-flammable

Stable. Incompatible with zinc, alkaline earth metals, Group I metals, aluminium and its alloys. Non-flammable.

P261, P271, P304+P340, P312, P403+P233, P405, P410+P403, P501

H280

SRP: Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in air, soil or water; effects on animal, aquatic and plant life; and conformance with environmental and public health regulations. If it is possible or reasonable use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination.|Product: Offer surplus and non-recyclable solutions to a licensed disposal company. Contact a licensed professional waste disposal service to dispose of this material; Contaminated packaging: Dispose of as unused product.

Incompatible materials: Aluminum, and its alloys|Violent reaction with /aluminum/.|Incompatible with powdered metals, including aluminum, zinc, and beryllium.|Destruction of the impellers in a centrifugal compressor occurred when abrasion exposed and heated fresh aluminum surfaces. These surfaces and dichlorodifluoromethane joined in a self-sustaining reaction with sufficient heat generation to melt and react much of the aluminum impeller material. ... Follow-up laboratory test reactions between aluminum and ... tetrafluoromethane established that vigorous reactions and heat outputs occurred ...

Danish EPA; Survey of selected fluorinated green-house gases (2015)[Available from, as of March 3, 2016: http://eng.mst.dk/]

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Some may burn but none ignite readily. Containers may explode when heated. Ruptured cylinders may rocket. (ERG, 2016)|Gives off irritating or toxic fumes (or gases) in a fire.

|Warning|H280 (100%): Contains gas under pressure; may explode if heated [Warning Gases under pressure]|P410+P40, and 410+P403|Aggregated GHS information provided by 161 companies from 3 notifications to the ECHA C&L Inventory.|H280: Contains gas under pressure; may explode if heated [Warning Gases under pressure]|H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]|P261, P271, P304+P340, P312, P403+P233, P405, and P501

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. LARGE SPILL: Consider initial downwind evacuation for at least 500 meters (1/3 mile). FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Do not touch or walk through spilled material. Stop leak if you can do it without risk. Do not direct water at spill or source of leak. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. If possible, turn leaking containers so that gas escapes rather than liquid. Prevent entry into waterways, sewers, basements or confined areas. Allow substance to evaporate. Ventilate the area. (ERG, 2016)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing will only provide limited protection. (ERG, 2016)|Eye/face protection: Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).|Skin protection: Handle with gloves.|Body Protection: Impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.|Respiratory protection: Where risk assessment shows air-purifying respirators are appropriate use a full-face respirator with multipurpose combination (US) or type AXBEK (EN 14387) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator. Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).|For more Personal Protective Equipment (PPE) (Complete) data for Tetrafluoromethane (8 total), please visit the HSDB record page.

Tetrafluoromethane may burn, but does not readily ignite.

Suitable extinguishing media: Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.|Advice for firefighters: Wear self-contained breathing apparatus for firefighting if necessary.|Use water spray to cool unopened containers.|If material on fire or involved in fire: 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. Do not use water on material itself. Use water spray to knock-down vapors. /Tetrafluoromethane, compressed or refrigerant gas R14/|Wear positive pressure self-contained breathing apparatus. /Tetrafluoromethane, compressed or refrigerant gas R14/

Under prolonged exposure to fire or heat the containers may rupture violently and rocket. /Tetrafluoromethane, compressed or refrigerant gas R14/

ACCIDENTAL RELEASE MEASURES: Personal precautions, protective equipment and emergency procedures: Avoid breathing vapors, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas; Environmental precautions: Do not let product enter drains; Methods and materials for containment and cleaning up: Clean up promptly by sweeping or vacuum.|High concentrations cause a deficiency of oxygen with the risk of unconsciousness or death. Check that oxygen content is at least 19% before entering storage or spill area. If in a building, evacuate building and confine vapors by closing doors and shutting down HVAC systems. Restrict persons not wearing protective equipment from area of spill or leak until cleanup is complete. Remove all ignition sources. Ventilate area of spill or leak to disperse the gas. Wear chemical protective suit with self-contained breathing apparatus to combat spills. Stay upwind and use water spray to "knock down" vapor; contain runoff. Stop the flow of gas, if it can be done safely from a distance. If source is a cylinder and the leak cannot be stopped in place, remove the leaking cylinder to a safe place; and repair leak or allow cylinder to empty. Absorb liquids in vermiculite, dry sand, earth, or a similar material and deposit in sealed containers. Keep this chemical out of confined spaces, such as a sewer, because of the possibility of explosion, unless the sewer is designed to prevent the buildup of explosive concentrations.

Appropriate engineering controls: Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.|Gloves must be inspected prior to use. Use proper glove removal technique (without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands.|If material not on fire and not involved in fire: Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. /Tetrafluoromethane, compressed or refrigerant gas R14/|Personnel protection: Keep upwind. Avoid breathing vapors. ... Avoid bodily contact with the material. /Tetrafluoromethane, compressed or refrigerant gas R14/

/GUIDE 126 GASES - COMPRESSED or LIQUEFIED (Including Refrigerant Gases)/ Fire or Explosion: Some may burn but none ignite readily. Containers may explode when heated. Ruptured cylinders may rocket. /Tetrafluoromethane; Tetrafluoromethane, compressed/|/GUIDE 126 GASES - COMPRESSED or LIQUEFIED (Including Refrigerant Gases)/ Health: Vapors may cause dizziness or asphyxiation without warning. Vapors from liquefied gas are initially heavier than air and spread along ground. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating, corrosive and/or toxic gases. /Tetrafluoromethane; Tetrafluoromethane, compressed/|/GUIDE 126 GASES - COMPRESSED or LIQUEFIED (Including Refrigerant Gases)/ Public Safety: CALL Emergency Response Telephone Number on Shipping Paper first. If Shipping Paper not available or no answer, refer to appropriate telephone number listed on the inside back cover. As an immediate precautionary measure, isolate spill or leak area for at least 100 meters (330 feet) in all directions. Keep unauthorized personnel away. Stay upwind. Many gases are heavier than air and will spread along ground and collect in low or confined areas (sewers, basements, tanks). Keep out of low areas. Ventilate closed spaces before entering. /Tetrafluoromethane; Tetrafluoromethane, compressed/|/GUIDE 126 GASES - COMPRESSED or LIQUEFIED (Including Refrigerant Gases)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection. Structural firefighters' protective clothing will only provide limited protection. /Tetrafluoromethane; Tetrafluoromethane, compressed/|For more DOT Emergency Guidelines (Complete) data for Tetrafluoromethane (8 total), please visit the HSDB record page.

No person may /transport,/ offer or accept a hazardous material for transportation in commerce unless that person is registered in conformance ... and the hazardous material is properly classed, described, packaged, marked, labeled, and in condition for shipment as required or authorized by ... /the hazardous materials regulations (49 CFR 171-177)./|The International Air Transport Association (IATA) Dangerous Goods Regulations are published by the IATA Dangerous Goods Board pursuant to IATA Resolutions 618 and 619 and constitute a manual of industry carrier regulations to be followed by all IATA Member airlines when transporting hazardous materials. Tetrafluoromethane is included on the dangerous goods list.|The International Maritime Dangerous Goods Code lays down basic principles for transporting hazardous chemicals. Detailed recommendations for individual substances and a number of recommendations for good practice are included in the classes dealing with such substances. A general index of technical names has also been compiled. This index should always be consulted when attempting to locate the appropriate procedures to be used when shipping any substance or article. Tetrafluoromethane is included on the dangerous goods list.

Personal protection: self-contained breathing apparatus. Ventilation.

Cool. Keep in a well-ventilated room. Well closed. Separated from powdered metals.

On loss of containment this substance can cause suffocation by lowering the oxygen content of the air in confined areas.

Exposure to cold gas could cause frostbite. The substance may cause effects on the cardiovascular system. This may result in cardiac disorders. Exposure at high levels could cause unconsciousness.

Use ventilation.

Cold-insulating gloves.

Wear face shield.

Tetrafluoromethane was detected in air samples obtained from air plumes of aluminum production plants(1).

Air samples collected at altitudes of 10 to 33 km at 44 deg N (southern France) in 1980 contained tetrafluoromethane; its mixing ratio was measured as 65 parts per trillion by volume at 14.4 km and 62 parts per trillion by volume at 33.2 km(1). Median tetrafluoromethane concentrations from remote, suburban, and source dominated sites were 0.070, 0.095, and 0.140 ppb by volume, respectively, for the years 1980 to 1987(2). The average daily ambient tetrafluoromethane concentration from 1980 to 1987 for 8 sites was 0.101 ppb by volume(2).|RURAL/REMOTE: Annual average concentrations of tetrafluoromethane in Pt. Barrow, AK were 73.6 and 74.5 parts/trillion volume in 1996 and 1997, respectively(1). Annual average concentrations reported for Cape Meares, OR were as follows (parts/trillion volume, (year)): 56.1 (1978); 58.8 (1979); 60.2 (1980); 61.6 (1981); 62.7 (1982); 61.6 (1983); 63.2 (1984); 64.9 (1985); 66.5 (1986); 65.2 (1987); 67.7 (1988); 67.3 (1989); 67.8 (1990); 69.5 (1991); 71.4 (1992); 70.0 (1993); 73.7 (1994); 73.4 (1995); 74.1 (1996); 74.2 (1997). Annual average concentrations of tetrafluoromethane reported for Palmer Station, Antarctic were 69.8, 72.4, 72.7, and 72.6 parts/trillion volume for 1994, 1995, 1996, and 1997, respectively. The ever increasing concentrations are attributed mainly to aluminum manufacturing (33 parts/trillion volume) and electronic chip production(1). The worldwide primary aluminum producers have reduced polyfluorinated carbon emissions per unit aluminum production by 47% from 1990 through 1997(2). Firn air (air present inside snow) samples collected at the North Greenland ice core project site in Greenland and from Berkner Island, Antarctica indicate that tetrafluoromethane increased from 40 to 78 parts/trillion between 1959 and 2003(3).|SOURCE DOMINATED: Tetrafluoromethane is a byproduct of the electrolytic production of primary aluminum(1). Monitoring of 8 aluminum smelters in Quebec Province, Canada (about 11% of the global aluminum production) was conducted during a 6-month period in 1993-1994. The emission of tetrafluoromethane was <1 ppb volume for periods between anode events; the average flux per anode event (a total of 1,105 events) ranged between 0.50 to 1.0 kg(2).

practically nontoxic

IDENTIFICATION AND USE: Tetrafluoromethane (CF4) is a colorless odorless gas. It is used as low temperature refrigerant; gaseous insulator. It is also used for plasma etching of silicon wafers in the semiconductor industry. HUMAN EXPOSURE AND TOXICITY: It can cause confusion, headache by inhalation. ANIMAL STUDIES: Tetrafluoromethane caused increases in acetylcholine output from the guinea-pig ileum. The anesthetic potencies of binary mixtures of the gases CF4-Ar and CF4-SF6 were studied in mice.

The anesthetic potencies of binary mixtures of the gases argon (Ar), nitrous oxide (N2O) and sulfur hexafluoride (SF6) have been measured using mice. The mixtures SF6-N2O and N2O-Ar showed additive behavior, whereas the constituents of the mixture SF6-Ar were non-additive, having a smaller total potency than expected. Further experiments on this mixture with Italian Great Newts and on the carbon tetrafluoride mixtures CF4-Ar and CF4-SF6 with mice suggested that the anomalous potencies may arise from specific pulmonary effects associated with the breathing of SF6 accompanied by a high pressure of some other gas.

No natural sources have been identified(1,2) however data are conflicting(SRC). Tetrafluoromethane was tested for but not detected in volcanic fumeroles on Hawaii(3). A background (unspecified rocks and soils) concentration of 40 parts/trillion volume was reported in 1997(4), released following the heating, crushing, and aqueous dissolution of certain rocks and minerals(5).

Tetrafluoromethane's production and use as a low temperature refrigerant, gaseous insulator(1) and in plasma etching processes of semiconductor production(2) may result in its release to the environment through various waste streams(SRC). Its subsequent formation from production of aluminum(3) results in its direct release to the environment(SRC). Atmospheric tetrafluoromethane was first observed as an impurity in krypton(2).

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 44(SRC), determined from a structure estimation method(2), indicates that tetrafluoromethane is expected to have very high mobility in soil(SRC). Volatilization of tetrafluoromethane from moist soil surfaces is expected to be an important fate process(SRC) given a Henry's Law constant of 5.15 atm-cu m/mole(3). Tetrafluoromethane is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 1.75X10+5 mm Hg at 25 °C(4). Highly chlorinated/fluorinated compounds are not expected to biodegrade rapidly(5).|AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 44(SRC), determined from a structure estimation method(2), indicates that tetrafluoromethane is not expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(3) based upon a Henry's Law constant of 5.15 atm-cu m/mole(4). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 3 hours and 4 days, respectively(SRC). Tetrafluoromethane is not expected to undergo hydrolysis in the environment due to the lack of functional groups that hydrolyze under environmental conditions(3). According to a classification scheme(5), an estimated BCF of 3(SRC), from its log Kow of 1.18(6) and a regression-derived equation(2), suggests the potential for bioconcentration in aquatic organisms is low(SRC). Highly chlorinated/fluorinated compounds are not expected to biodegrade rapidly(7).|ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), tetrafluoromethane, which has a vapor pressure of 1.75X10+5 mm Hg at 25 °C(2), is expected to exist solely as a gas in the ambient atmosphere. Tetrafluoromethane has an atmospheric lifetime of 2300 to 50,000 years(3). Tetrafluoromethane is exceedingly inert photochemically, with no absorption at wavelengths longer than 110 nm(4) and, therefore, is not expected to be susceptible to direct photolysis by sunlight(SRC).

Tetrafluoromethane's estimated atmospheric lifetime ranges from 2300 to 50,000 years(1). Tetrafluoromethane has reported 100 and 500 Year Global Warming Potential of 6500(2) and 8800(3), respectively. Tetrafluoromethane is not expected to undergo hydrolysis in the environment due to the lack of functional groups that hydrolyze under environmental conditions(4). Tetrafluoromethane is exceedingly inert photochemically, with no absorption at wavelengths longer than 110 nm(5).

An estimated BCF of 3 was calculated in fish for tetrafluoromethane(SRC), using a log Kow of 1.18(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low(SRC).

Using a structure estimation method based on molecular connectivity indices(1), the Koc of tetrafluoromethane can be estimated to be 44(SRC). According to a classification scheme(2), this estimated Koc value suggests that tetrafluoromethane is expected to have very high mobility in soil.

The Henry's Law constant for tetrafluoromethane is reported as 5.15 atm-cu m/mole(1). This Henry's Law constant indicates that tetrafluoromethane is expected to volatilize rapidly from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 3 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 4 days(SRC). Tetrafluoromethane's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). Tetrafluoromethane is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 1.75X10+5 mm Hg(3).

According to the 2012 TSCA Inventory Update Reporting data, 3 reporting facilities estimate the number of persons reasonably likely to be exposed in the manufacturing, processing, or use of tetrafluoromethane in the United States may be as low as <10 workers up to the range of 10-25 workers per plant; the data may be greatly underestimated due to confidential business information (CBI) or unknown values(1).|NIOSH (NOES Survey 1981-1983) has statistically estimated that 3677 workers (1367 of these are female) were potentially exposed to tetrafluoromethane in the US(1). Occupational exposure to tetrafluoromethane may occur through inhalation and dermal contact with this compound at workplaces where tetrafluoromethane is produced or used. Monitoring data indicate that the general population may be exposed to tetrafluoromethane via inhalation of ambient air(SRC).

The substance can be absorbed into the body by inhalation.

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Vapors may cause dizziness or asphyxiation without warning. Vapors from liquefied gas are initially heavier than air and spread along ground. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating, corrosive and/or toxic gases. (ERG, 2016)

Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]: Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water. Keep victim calm and warm. (ERG, 2016)

Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.

ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention .

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Halogenated aliphatic hydrocarbons and related compounds/|Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool. Administer activated charcoal ... . Cover skin burns with sterile dressings after decontamination ... . /Halogenated aliphatic hydrocarbons and related compounds/|Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag-valve-mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start IV administration of D5W TKO. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Consider vasosupressors if patient is hypotensive with a normal fluid volume. Watch for signs of cardiac irritability and fluid overload ... . Treat seizures with diazepam (Valium) or lorazepam (Ativan) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Halogenated aliphatic hydrocarbons and related compounds/

/SIGNS AND SYMPTOMS/ On contact with gas: Frostbite.|/SIGNS AND SYMPTOMS/ Inhalation: Confusion, headache. Skin: On contact with liquid: frostbite /from table/|/SIGNS AND SYMPTOMS/ Toxic by inhalation.

carbon tetrafluoride

The substance can be absorbed into the body by inhalation.

Confusion. Dizziness. Headache. Irregular heartbeat. Unconsciousness.

ON CONTACT WITH GAS: FROSTBITE.

ON CONTACT WITH GAS: FROSTBITE.

Refrigerants, 39%; foam blowing agents, 17%; solvents, 14%; fluoropolymers, 14%; sterilant gas, 2%; aerosol propellants, 2%; food freezant, 1%; other, 8%; exports, 3% (1985) /fluorocarbons/

Grade: 95% min purity.

Computer and electronic product manufacturing|Methane, tetrafluoro-: ACTIVE|Hydrofluorocarbons have gained increasing commercial interest as substitutes for chlorofluoro- and hydrochlorofluorocarbons since governmental regulations banned the worldwide production and consumption of CFCs by 1996 and introduced a specific timetable for the phase out of HCFCs. In contrast to CFCs, hydrofluorocarbons have no adverse effect on the ozone layer and only a low contribution to global warming ... The latter effect could be further minimized by avoiding leakages in refrigeration and air-conditioning equipment and by refrigerant recycling. /Hydrofluorocarbons/|1.3-3.6 kg of tetrafluoromethane estimated to be produced per ton of aluminum for the period up to approximately 1985|Light membranes composed of single-walled carbon nanotubes (SWNTs) can serve as efficient nanoscale vessels for encapsulation of tetrafluoromethane at 300 K and operating external pressure of 1 bar ... The amount of adsorbed CF4 strongly depends on the pore size in nanotubes; at 1 bar the most efficient nanotubes for volumetric storage have size R = 0.68 nm. This size corresponds to the (10,10) armchair nanotubes produced nowadays in large quantities. For mass storage (i.e., weight %) the most efficient nanotubes have size R = 1.02 nm corresponding to (15,15) armchair nanotubes. They are better adsorbents than currently used activated carbons and zeolites, reaching approximately equal to 2.4 mol/kg of CF4, whereas, the best activated carbon Carbosieve G molecular sieve can adsorb 1.7 mol/kg of CF4 at 300 K and 1 bar ...

Gas chromatographic method for determining fluorocarbons in air is described. Concn in air are determined directly. /Fluorocarbons/|A gas chromatographic procedure for determining atmospheric levels of fluorocarbons is described. Column is temp programmed to separate halogenated components while maintaining short retention times for each component. Freon 113 incl. /Fluorocarbons/

Gas chromatography with electron capture analysis of the blood headspace can be used to determine the concentration of halogenated solvents in biological samples. /Halogenated Hydrocarbons-Halogenated Solvents/