Compressible gases 1-4 INDEX

Some bromine compounds are covered specifically under Hazardous Materials Regulations. Other compounds may usually be shipped under the classification of chemicals, not otherwise indexed by name, without special requirements unless from their nature they would fall under a category such as combustible liquid, compressed gas, corrosive liquid (or solid), disinfectant liquid (or solid), dmg, dye intermediate (liquid), fire extinguisher, flammable gas (liquid or solid), insecticide, medicine, oxidizer or oxidizing material, poisonous liquid (gas or solid), solvent, or tear gas. Specific provisions apply to each of these categories and appropriate packaging and labeling are required. 

Properties Colorless compressed gas or liquid faintly sweet ethereal odor. D 0.92 (20C), bp -23.7C, fp -97.6C, flash p approximately 32F (0C), refr index 1.3712 (—23.7C), critical temperature 143C, critical pressure 970 psi absolute, autoign temp 1170F (632C), bulk d 7.68 lb/gal (20C). Slightly soluble in water, by which it is decomposed soluble in alcohol, chloroform, benzene, carbon tetrachloride, glacial acetic acid attacks aluminum, magnesium, and zinc. 

Compressed Gas Association, phone no. 212-412-9000 or httr) //www.naturalgas.org/CGA/index.htm National Fire Prevention Association, phone no. 617-770-3000 or http //www.nfpa.org/home.html... 

Part III. Appendices Appendix 1 Glossary of technical terms Appendix 2 Technical symbols and abbreviations Appendix 3 Acronyms Appendix 4 Conversion factors Appendix 5 State regulatory agencies and codes Appendix 6 Publications of the compressed gas association Index... 

CGA V-5, Diameter Index Safety System, 3 ed.. Compressed Gas Association, Inc., 1725 Jefferson Davis Highway, Arlington, VA 22202. 

The standard pin-indexed yoke connection in the United States and Canada (for medical use of the gas) is Connection CGA 930 for service pressures up to 3000 psig (20 684 kPa). Further information on connections can be found in CGA V-1, American National, Canadian, and Compressed Gas Association Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections. [7]... 

DISS Diameter Index Safety System. Used in the medical gases and medical equipment segment of the compressed gas industry to help in the avoidance of erroneous connections. See CGA V-5 for details. 

Simple thermodynamic treatment of gas compression stipulates that the maximum temperature (Tmax) attained is dependent on the adiabatic index (y) of the gas ... 

The efficiency of a column can be assessed in a similar manner to that described for HPLC and values for the resolution index of two solutes, the number of theoretical plates and the height equivalent to a theoretical plate may also be calculated. Although it is easier to measure gas pressure, it is the actual gas flow, which is affected by the particle size and compression of the packing, that should be used in column assessment investigations. 

The general character of the motion is shown in Fig. 1. A shock wave propagates in an unperturbed cold gas the maximum compression, which is dependent on the adiabatic index of the gas, is reached at the front of this wave. The velocity of propagation of the shock wave and the mass velocity at the front are related in an elementary way to the pressure of the shock wave. Behind the front the pressure, density, and velocity decrease.1... 

Let s first look at the problem in an oversimplified manner. We can introduce additional molecules into a container holding a gas and change the number of molecules per unit volume (N/V) significantly. A liquid is not very compressible, however, by which we mean that adding molecules to a liquid (at constant pressure) simply changes the total volume, but not N/V, or the concentration of molecules. The change in refractive index with concentration dn/dc, is therefore significant for a gas, but if liquids were continuous dnldc would be zero. 

---