Nonflammable compressed gases

Compressed Ga.s PropeIIa.nts. The compressed gas propellants, so named because they are gaseous in conventional aerosol containers, are nontoxic, nonflammable, low in cost, and very inert. When used in aerosols, however, the pressure in the container drops as the contents are depleted. Although the problem is lessened when the contents are materials in which the propellant is somewhat soluble, this pressure drop may cause changes in the rate and characteristics of the aerosol spray. A compressed gas aerosol system is illustrated in Figure 3. 

Compressed gas same shape, size and lettering as above, but the color of the label shall be red for flammable gases and bright green for nonflammable gases... 

Nitrous oxide is a nonflammable, colorless and odorless, sweettasting gas. It is usually handled as a compressed gas, stored in metal cylinders. 

A compressed gas used to expel the contents of containers in the form of aerosols. Chlorofluorocarbons were once widely used because of their nonflammability. The strong possibility that they contribute to depletion of the ozone layer of the upper atmosphere has resulted in prohibition of their use for this purpose. Other propellants used are hydrocarbon gases, such as butane and propane, carbon dioxide, and nitrous oxide. The materials dispersed include insecticides, shaving cream, whipping cream,andcosmeticpreparations. See ozone (note). 

Nonflammable, nonpoisonous compressed gas Gas poisonous by inhalation Corrosive gas (Canadian)... 

A cylinder containing a compressed gas classified as fiam-mable or nonflammable that is carried by a private or contract motor carrier, not overpacked, and durably and legibly marked in accordance with the requirements of Appendix A of Compressed Gas Association Pamphlet C-7,... 

Xenon, Xe, is a gaseous, nonmetallic element from family eight. It is a colorless, odorless gas or liquid. It is nonflammable and nontoxic at standard temperatnres and pressnres, but is an asphyxiant and will displace oxygen in the air. The boiling point is -162°F, and the vapor density is 05.987, which is heavier than air. Xenon is chemically unreactive however, it is not completely inert. The fonr-digit UN identification number is 2036 for the compressed gas and 2591 for the cryogenic liqnid. Xenon is used in luminescent tubes, flash lamps in photography, lasers, and as an anesthesia. 

There are some foolers in the nonflanunable compressed gas subclass. Anhydrous ammonia, for example, is regulated by the DOT as a nonflammable compressed gas. The United States is the only country in the world that placards anhydrous ammonia in this manner. Such placarding of anhydrous ammonia as a nonflammable gas is a result of lobbying efforts by the agricultural fertilizer industry. In most other parts of the world, anhydrous ammonia is placarded as a poison gas, not to mention... 

Compressed air or nonflammable compressed gas-operated industrial trucks ... 

CGA P-15, Filling of Industrial and Medical Nonflammable Compressed Gas Cylinders, ed.. Compressed Gas Association, Inc., 1725 Jefferson Davis Highway, Arlington, VA 22202. 

Carbon dioxide is classified as a nonflammable refrigerated liquid, class 2.2. It is typically transported at pressures between 150 psig and 300 psig (1030 kPa and 2070 kPa) as a liquefied compressed gas. 

Gases in the nonflammable, liquefied compressed gas category include carbon dioxide, nitrous oxide, and others. Liquefied gases must be filled by weight, not by pressure. Note that... 

Gaseous argon must be handled with all the precautions necessary for safety as with any nonflammable, nontoxic compressed gas. All precautions necessary for the safe handling of any gas liquefied at very low temperatures must be observed with liquid argon. Extensive tissue damage or bums can result from exposure to liquid argon or cold argon vapors. 

---