Dibromodifluoromethane

209.82

209.82

200-885-5

82022727JD

1419

1941

DTXSID9058789

Colorless heavy liq|COLORLESS GAS|Colorless, heavy liquid or gas (above 76 degrees F).

29034700

0

1.99

Dibromodifluoromethane is a colorless, nonflammable liquid. It may cause illness from ingestion and may be irritating to skin. If exposed to high temperatures it may emit toxic fumes. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Since it is a liquid it can easily penetrate the soil and contaminate groundwater and nearby streams. It is used as a fire extinguishing agent.

2 x 10^-6 g/cm³ @ Temp: 15 °C

-110.1 °C

25 °C @ Press: 760 Torr

None

1.457

Insoluble

Refrigerator (+4°C)

Vapour pressure, kPa at 20°C: 83

7.24 (vs air)

Inhalation-Mouse LC50: 140000 mg/m3/1 hour

No burning; toxic fluoride and bromide gases are produced in the fire; ozone-depleting substances

Characteristic odor

5.90e-16 cm3/molecule*sec

1 MG/L EQUIV TO 116.5 PPM & 1 PPM EQUIV TO 8.58 MG/CU M @ 25 °C, 760 MM HG|Ionization potential 11.07 eV

No rapid reaction with air No rapid reaction with water

Fluorinated Organic Compounds

DIBROMODIFLUOROMETHANE is incompatible with the following: Chemically-active metals such as sodium, potassium, calcium, powdered aluminum, zinc & magnesium (NIOSH, 2016).

11.07 eV

Noncombustible Liquid

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

3.317X10+7 J/kmol @ -110 °C

Critical temperature: 205 °C; critical pressure: 3.9X10+4 mm Hg

III

9

1941

3

36/37/38-59

37/39-26-59

PA7525000

Xi,N

Warehouse ventilated, low temperature and dry

Irritant

P260, P264, P270, P309+P311, P405, P501

H420

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Chemically active metals such as sodium, potassium, calcium, powdered aluminum, zinc, magnesium|Decomposition vapors obtained from contact of difluorodibromomethane with iron at 800 °C produced the acute toxicity at a concentration of 1870 ppm.

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]: Some may burn but none ignite readily. Containers may explode when heated. Some may be transported hot. For UN3508, be aware of possible short circuiting as this product is transported in a charged state. (ERG, 2016)|Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

|Warning|H420 (100%): Harms public health and the environment by destroying ozone in the upper atmosphere [Warning Hazardous to the ozone layer]|P50, and 502|Aggregated GHS information provided by 38 companies from 1 notifications to the ECHA C&L Inventory.|H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]|P260, P264, P270, P309+P311, P405, and P501

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]: SMALL FIRE: Dry chemical, CO2, water spray or regular foam. LARGE FIRE: Water spray, fog or regular foam. Do not scatter spilled material with high-pressure water streams. Move containers from fire area if you can do it without risk. Dike fire-control water for later disposal. FIRE INVOLVING TANKS: Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. (ERG, 2016)|In case of fire in the surroundings, use appropriate extinguishing media.

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]: As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. SPILL: Increase, in the downwind direction, as necessary, the isolation distance shown above. 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 171 [Substances (Low to Moderate Hazard)]: Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent dust cloud. Avoid inhalation of asbestos dust. SMALL DRY SPILL: With clean shovel, place material into clean, dry container and cover loosely; move containers from spill area. SMALL SPILL: Pick up with sand or other non-combustible absorbent material and place into containers for later disposal. LARGE SPILL: Dike far ahead of liquid spill for later disposal. Cover powder spill with plastic sheet or tarp to minimize spreading. Prevent entry into waterways, sewers, basements or confined areas. (ERG, 2016)

Skin: Wear appropriate personal protective clothing to prevent skin contact. Eyes: Wear appropriate eye protection to prevent eye contact. Wash skin: No recommendation is made specifying the need for washing the substance from the skin (either immediately or at the end of the work shift). Remove: Work clothing that becomes wet or significantly contaminated should be removed and replaced. Change: No recommendation is made specifying the need for the worker to change clothing after the work shift. (NIOSH, 2016)|Wear appropriate clothing to prevent repeated or prolonged skin contact. Wear eye protection to prevent any reasonable probability of eye contact.|Wear rubber gloves ... coveralls.|Wear appropriate personal protective clothing to prevent skin contact.|Wear appropriate eye protection to prevent eye contact.|For more Personal Protective Equipment (PPE) (Complete) data for DIBROMODIFLUOROMETHANE (8 total), please visit the HSDB record page.|(See protection codes)

NONFLAMMABLE.

SUFFICIENT EXHAUST & GENERAL VENTILATION SHOULD BE PROVIDED ... EXCESS SKIN CONTACT WITH LIQ FLUOROCARBONS SHOULD BE MINIMIZED TO PREVENT DEFATTING OF SKIN & POSSIBLE SKIN ABSORPTION. /FLUOROCARBONS/|If this chemical gets into the eyes, irrigate immediately. If this chemical contacts the skin, flush with water immediately. ... Remove nonimpervious clothing promptly if wet or contaminated.|FILLING AREAS SHOULD BE MONITORED TO ENSURE THAT THE AMBIENT CONCN OF FLUOROCARBONS DOES NOT EXCEED 1000 PPM ... INHALATION OF FLUOROCARBON VAPORS SHOULD BE AVOIDED ... /FLUOROCARBONS/|APPEARANCE OF TOXIC DECOMP PRODUCTS SERVES AS WARNING OF OCCURRENCE OF THERMAL DECOMP & DETECTION OF SHARP ACRID ODOR WARNS OF PRESENCE ... HALIDE LAMPS OR ELECTRONIC LEAK DETECTORS MAY ALSO BE USED. ADEQUATE VENTILATION ALSO AVOIDS PROBLEM OF TOXIC DECOMPOSITION PRODUCTS. /FLUOROCARBONS/|For more Preventive Measures (Complete) data for DIBROMODIFLUOROMETHANE (7 total), please visit the HSDB record page.

/GUIDE 171: SUBSTANCES (Low to Moderate Hazard)/ Fire or Explosion: Some may burn but none ignite readily. Containers may explode when heated. Some may be transported hot.|/GUIDE 171: SUBSTANCES (Low to Moderate Hazard)/ Health: Inhalation of material may be harmful. Contact may cause burns to skin and eyes. Inhalation of Asbestos dust may have a damaging effect on the lungs. Fire may produce irritating, corrosive and/or toxic gases. Some liquids produce vapors that may cause dizziness or suffocation. Runoff from fire control may cause pollution.|/GUIDE 171: SUBSTANCES (Low to Moderate Hazard)/ 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 in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids. Keep unauthorized personnel away. Stay upwind.|/GUIDE 171: SUBSTANCES (Low to Moderate Hazard)/ Protective Clothing: Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing will only provide limited protection.|For more DOT Emergency Guidelines (Complete) data for DIBROMODIFLUOROMETHANE (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.|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.

... IRRITANT.|... irritation of nose and throat ...

Recommended Exposure Limit: 10 Hr Time-Weighted Avg: 100 ppm (860 mg/cu m).

Ventilation. Do NOT let this chemical enter the environment.

See Chemical Dangers.

A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

The substance is irritating to the respiratory tract. Inhalation of high levels may cause lung oedema. The substance may cause effects on the central nervous system. Exposure could cause lowering of consciousness.

Use ventilation, local exhaust or breathing protection.

Protective gloves.

Wear safety spectacles.

URBAN/SUBURBAN: Numerous air samples taken from four separate landfills located in New Jersey contained detectable levels of dibromodifluoromethane(1). At one landfill, dibromodifluoromethane was detected 85% of the time while at the other three landfills it was detected 65% of the time (concentrations not specified)(1). A study of the types and levels of brominated compounds released into the atmosphere by chemical manufacturers in the state of Arkansas revealed detectable levels of dibromodifluoromethane over a two year period(2). Many of the chemicals studied were detected off plant property suggesting transport into neighboring environments was occurring(2).

practically nontoxic

IF INHALATION OCCURS, EPINEPHRINE OR OTHER SYMPATHOMIMETIC AMINES & ADRENERGIC ACTIVATORS SHOULD NOT BE ADMIN SINCE THEY WILL FURTHER SENSITIZE HEART TO DEVELOPMENT OF ARRHYTHMIAS. /FLUOROCARBONS/

IT IS POSSIBLE THAT PT WITH CARDIAC OR RESP DISORDERS MAY PROVE ESP SUSCEPTIBLE. /FLUOROCARBONS/

This and other freons are used occasionally to trace the plume of major power plants and, thus, may occur in urban air from this activity.|Dibromodifluoromethane's production and use in fire extinguishers(1,2) may result in its release to the environment through various waste streams(SRC). However, the production of dibromodifluoromethane (Halon 1202) has to be stopped in accordance with the Montreal Protocol of 1987 as it plays an important role in the destruction of the earth's ozone layer(3). The Montreal Protocol stipulates that the production and consumption of compounds that deplete ozone in the stratosphere, including halons, are to be phased out by 2000(3).

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 49(SRC), determined from a structure estimation method(2), indicates that dibromodifluoromethane is expected to have very high mobility in soil(SRC). Volatilization of dibromodifluoromethane from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 0.03 atm-cu m/mole(SRC), using a fragment constant estimation method(3). Volatilization of dibromodifluoromethane from dry soil surfaces is expected to occur rapidly(SRC) based upon a vapor pressure of 820 mm Hg(4). Based upon the highly halogenated structure of dibromodifluoromethane, biodegradation is expected to be slow(5).|AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 49(SRC), determined from a structure estimation method(2), indicates that dibromodifluoromethane is not expected to adsorb to suspended solids and sediment in water(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 0.03 atm-cu m/mole(SRC), developed using a fragment constant estimation method(4). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 1.5 hrs and 5.7 days, respectively(SRC). According to a classification scheme(5), an estimated BCF of 6.9(SRC), from an estimated log Kow(6) and a regression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low. Based upon the highly halogenated structure of dibromodifluoromethane, biodegradation is expected to be slow(8).|ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), dibromodifluoromethane, which has a vapor pressure of 820 mm Hg at 25 °C(2), is expected to exist solely in the vapor-phase in the ambient atmosphere. Vapor-phase dibromodifluoromethane is slowly degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be greater than 44 years(3), based on its rate constant of <5.0X10-16 cu cm/molecule-sec at 25 °C(4). Dibromodifluoromethane absorbs very little UV radiation above 290 nm and is not expected to photolyze at an environmentally important rate in the ambient atmosphere(5). Based on dibromodifluoromethane's long residence time in the atmosphere, it will diffuse gradually into the upper limits of the troposphere, and eventually into the stratosphere above the ozone layer where it will contribute to ozone depletion(6).

The rate constant for the vapor-phase reaction of dibromodifluoromethane with photochemically-produced hydroxyl radicals is <5.0X10-16 cu cm/molecule-sec at 25 °C(1). This corresponds to an atmospheric half-life greater than 44 years(SRC) at an atmospheric concn of 5X10+5 hydroxyl radicals per cu cm(1). Although there is no experimental evidence of dibromodifluoromethane hydrolyzing in the ambient environment, similarly structured organic halide compounds are known to hydrolyze at an extremely slow rate (half-lives > 100 years)(2). Dibromodifluoromethane has two max UV absorbances; one at 188.5 and 226.3 nm(3). Dibromodifluoromethane absorbs very little UV radiation above 290 nm and is not expected to photolyze at a significant rate in the ambient atmosphere(3).

An estimated BCF of 6.9 was calculated for dibromodifluoromethane(SRC), using an estimated log Kow of 2.0(1,SRC) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low.

Using a structure estimation method based on molecular connectivity indices(1), the Koc for dibromodifluoromethane can be estimated to be about 49(SRC). According to a classification scheme(2), this estimated Koc value suggests that dibromodifluoromethane is expected to have very high mobility in soil.

The Henry's Law constant for dibromodifluoromethane is estimated as 0.03 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that dibromodifluoromethane 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 1.5 hrs(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 5.7 days(SRC). Dibromodifluoromethane's Henry's Law constant(1) indicates that volatilization from moist soil surfaces may occur(SRC). Volatilization of dibromodifluoromethane from dry soil surfaces is expected to occur rapidly(SRC) based upon a vapor pressure of 820 mm Hg(3).

NIOSH (NOES Survey 1981-1983) has statistically estimated that 28 workers (0 of these are female) are potentially exposed to dibromodifluoromethane in the US(1). However, production of dibromodifluoromethane has since been banned in the United States, hence occupational exposure will only occur in the use of fire extinguishers(2) with dibromodifluoromethane as an ingredient(SRC). The general population may be exposed to dibromodifluoromethane via inhalation of ambient air(3,4) and from fire extinguisher products(2,5) containing dibromodifluoromethane. Due to its ozone depleting potential in the stratosphere, its use is decreasing(6).

... MAIN FACTOR AFFECTING FATE OF FLUOROCARBONS IS BODY FAT, WHERE THEY ARE CONCENTRATED & SLOWLY RELEASED INTO BLOOD @ CONCN THAT SHOULD NOT CAUSE ANY RISK OF CARDIAC SENSITIZATION. /FLUOROCARBONS/|THERE IS A SIGNIFICANT ACCUMULATION OF PROPELLANTS IN BRAIN, LIVER & LUNG COMPARED TO BLOOD LEVELS, SIGNIFYING PROPELLANT TISSUE DISTRIBUTION SIMILAR TO THAT OF CHLOROFORM. /FLUOROCARBONS/

Cardiac arrhythmia, possibly aggravated by elevated levels of catecholamines due to stress ... is suggested as the cause of these adverse responses, which may lead to death. /Fluorocarbons/

Excerpt from ERG Guide 171 [Substances (Low to Moderate Hazard)]: Inhalation of material may be harmful. Contact may cause burns to skin and eyes. Inhalation of Asbestos dust may have a damaging effect on the lungs. Fire may produce irritating, corrosive and/or toxic gases. Some liquids produce vapors that may cause dizziness or suffocation. Runoff from fire control may cause pollution. (ERG, 2016)

Eye: If this chemical contacts the eyes, immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical. Skin: If this chemical contacts the skin, immediately flush the contaminated skin with water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. Get medical attention promptly. Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. If breathing has stopped, perform mouth-to-mouth resuscitation. Keep the affected person warm and at rest. Get medical attention as soon as possible. Swallow: If this chemical has been swallowed, get medical attention immediately. (NIOSH, 2016)|(See procedures)

Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.

Rinse and then wash skin with water and soap.

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

Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations as needed. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Minimize physical activity and provide a quiet atmosphere. Monitor for pulmonary edema and treat if necessary ... Anticipate seizures and treat if necessary ... For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport ... Do not use emetics. 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 ... Treat frostbite with rapid rewarming techniques ... /Chlorinated Fluorocarbons (CFCs) and related compounds/|Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious or in respiratory arrest. Positive pressure ventilation techniques with a bag-valve-mask device may be beneficial. Monitor cardiac rhythm and treat arrhythmias if necessary ... Start an IV with D5W TKO /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Watch for signs of fluid overload. Consider drug therapy for pulmonary edema ... Treat seizures with diazepam (Valium) ... Use proparacaine hydrochloride to assist eye irrigation ... /Chlorinated fluorocarbons (CFCs) and related compounds/

EARLY ... HUMAN EXPERIENCE INDICATED THAT HIGH VAPOR CONCN (EG, 20%) MAY CAUSE CONFUSION, PULMONARY IRRITATION, TREMORS & RARELY COMA, BUT THAT THESE EFFECTS WERE GENERALLY TRANSIENT & WITHOUT LATE SEQUELAE. ... CAUSE OF DEATH /FROM ABUSE OF FLUOROCARBONS/ IS IN CONSIDERABLE DOUBT. FREEZING OF AIRWAY SOFT TISSUES CAN PROBABLY BE ELIMINATED AS A CAUSE OF DEATH EXCEPT IN CASES WHERE THE PRODUCT WAS SPRAYED DIRECTLY INTO THE MOUTH FROM ITS CONTAINER OR FROM A BALLOON CONTAINING SOME LIQUID. LARYNGEAL SPASM OR EDEMA, OXYGEN DISPLACEMENT, OR SENSITIZATION OF MYOCARDIUM TO ENDOGENOUS CATECHOLAMINES WITH SUBSEQUENT VENTRICULAR FIBRILLATION APPEAR TO BE REASONABLE POSSIBILITIES. /FLUOROCARBONS/|A SPECIAL CLASS OF CHEMICALS SUBJECT TO ABUSE BY INHALATION ARE THE FLUOROHYDROCARBONS ... THE "SNIFFING" OF SUCH AEROSOL SPRAYS IS HAZARDOUS PRACTICE. ... 110 "SUDDEN SNIFFING DEATHS" /HAVE BEEN IDENTIFIED/ ... IN EACH CASE THE VICTIM SPRAYED THE AEROSOL INTO A PLASTIC BAG, INHALED THE CONTENTS, BECAME EXCITED, RAN 90 M OR SO, COLLAPSED, & DIED. NECROPSY FINDINGS WERE LARGELY NEGATIVE ... ALTHOUGH AMOUNT OF PROPELLANT ABSORBED INTO BLOOD FROM USE OF HAIRSPRAY, COSMETIC, HOUSEHOLD, & MEDICATED AEROSOLS MUST VARY WITH CIRCUMSTANCES, PHYSICIAN IS ADVISED TO COUNSEL ... PATIENT ON POTENTIAL DANGERS, PARTICULARLY FROM THEIR USE IN POORLY VENTILATED CONFINED AREAS. IT IS POSSIBLE THAT PATIENTS WITH CARDIAC OR RESPIRATORY DISORDERS MAY PROVE ESPECIALLY SUSCEPTIBLE. /FLUOROHYDROCARBONS/|Fluorocarbons containing bromine ... are more toxic than the corresponding chloro compounds. /Fluorocarbons/|MANUFACTURING PROCESSES USE HYDROFLUORIC ACID FROM FLUOROSPAR IN PRODUCTION OF ALL FLUOROCARBONS. SOME PROCESSES USE CARBON TETRACHLORIDE FROM CARBON DISULFIDE, OR AS CO-PRODUCT OF PERCHLOROETHYLENE & CHLORINATION OF PROPYLENE, OR CHLOROFORM FROM CHLORINATION OF METHANOL. THE MAJOR HAZARDS RELATE PRIMARILY TO THE INADVERTENT RELEASE OF HYDROFLUORIC ACID OR CARBON TETRACHLORIDE, RATHER THAN TO THE MANUFACTURED FLUOROCARBONS. /FLUOROCARBONS/|FLUOROCARBON VAPORS ARE FOUR TO FIVE TIMES HEAVIER THAN AIR. THUS HIGH CONCN TEND TO ACCUMULATE IN LOW-LYING AREAS, RESULTING IN HAZARD OF INHALATION OF CONCENTRATED VAPORS, WHICH MAY BE FATAL. ... THE HIGHEST EXPOSURE IN THE PLANT OCCURS WITH VENTING OF GASES FROM RETURNABLE CYLINDERS. /FLUOROCARBONS/

The substance can be absorbed into the body by inhalation.|inhalation, ingestion, skin and/or eye contact

In Animals: irritation respiratory system; central nervous system symptoms; liver damage

Cough. Sore throat. Laboured breathing. Shortness of breath. Confusion. Drowsiness. Unconsciousness.

respiratory system, central nervous system, liver

Grades: Pure (95.0% minimum)

Methane, dibromodifluoro-: ACTIVE|MECHANICAL VAPOR COMPRESSION SYSTEMS USE FLUOROCARBONS FOR REFRIGERATION & AIR CONDITIONING & ACCOUNT FOR ... MAJORITY OF REFRIGERATION CAPABILITY IN US. ... FLUOROCARBONS ARE USED AS REFRIGERANTS IN HOME APPLIANCES, MOBILE AIR CONDITIONING UNITS, RETAIL FOOD REFRIGERATION SYSTEMS & ... CHILLERS. /FLUOROCARBONS/|THE BROMINE-CONTAINING FLUOROCARBONS OPERATE BY CHEMICAL INTERRUPTION OF THE COMBUSTION CHAIN, AND ARE USED IN TOTAL FLOODING SYSTEMS FOR COMPUTER ROOMS AND TELEPHONE FACILITIES, AS WELL AS AIRCRAFT AND PORTABLE FIRE EXTINGUISHERS, INCLUDING USE ON THE AIR FORCE P-13 RAPID INTERVENTION CRASH TRUCKS. HALON EMERGES FROM THE FIRE EXTINGUISHER NOZZLE AS A MIXTURE OF 85 PERCENT LIQUID AND 15 PERCENT VAPOR AND IS DISCHARGED OVER LONG DISTANCES. IT COMPLETELY VAPORIZES UPON CONTACT WITH FIRE. /BROMINATED FLUOROCARBONS/

NIOSH Method 1012. Determination of Difluorodibromomethane by Gas Chromatography with Flame Ionization Detection. This method is applicable to air samples.|GAS CHROMATOGRAPHY; PERCIVAL WC, ANAL CHEM 29, 21 (1959). FIELD METHOD; BRAID PE & KINGSLEY KAY, CAN J TECHNOL 29, 159 (1951).

FLUOROCARBON DETERMINATION IN BLOOD: GC WITH ELECTRON CAPTURE DETECTION. /FLUOROCARBONS/