Propadiene-methylacetylene mixture

Synonyms MAPP D Gas liquefied petroleum gas with methylacetylene-propadiene methylacetylene-propadiene mixture methylacetylene-propadiene stabilized CAS Registry Number none DOT Classification Flammable gas DOT Label Flammable gas Transport Canada Classification 2.1 UN Number UN 1075... 

Sodium Alkylbenzene-sulfonates Methylacetylene-Propadiene Mixture Fumaric Acid... 

Compound Name Methyl Acetate Propionic Acid Propionic Anhydride Methyl Mercaptan Dimethyl Sulfide Formic Acid Methyl Alcohol Hexamethylenetetramine Methoxychlor Methoxychlor Diethylebe Glycol Monomethyl Ether Methylacetylene-Propadiene Mixture Methylacetylene-Propadiene Mixture Crotonaldehyde Methyl Acrylate Methyl Formal Methyl Alcohol Methallyl Chloride Methylamine N-Methylaniline Methyl Amyl Acetate Methyl Amyl Alcohol Methyl Isobutyl Carbinol N-Amyl Methyl Ketone O-Toluidine 0-Toluidine N-Methylaniline N-Methylaniline Propyleneiniiine. 

Chemical Designations - Synonyms Allene-methylacetylene mixture MAPP gas Methylacetylene-allene mixture Propadiene-methylacetylene mixture Chemical Formula. CH3C=CH+CH2=C=CHj Ohservahle Characteristics - Physical State (as shipped) Liquefied compressed gas Color. Colorless Odor Offensive, like acetylene. 

Methylacetylene also is used in welding torches. Methylacetylene does not decompose as easily as acetylene, and it burns better in air (as opposed to pure oxygen). Methylacetylene is well suited for household soldering and brazing that requires higher temperatures than propane torches can reach. The industrial synthesis of methylacetylene gives a mixture with its isomer, propadiene (allene). This mixture is sold commercially under the name MAPP gas (MethylAcetylene-ProPadiene). 

For small-scale and consumer welding applications, many hardware stores sell cylinders of MAAP gas, which is a mixture of prop)me (methylacetylene) and 1,2-propadiene (allene), with other hydrocarbons. How would you prepare the methylacetylene/allene mixture from propene in the laboratory ... 

DOT Proper Shipping Name Methylacetylene and Propadiene mixture, stabilized. DOT Classification 2.1 (Flammable gas)... 

TC Shipping Name Methylacetylene and Propadiene mixture, stabilized. 

Flammability and Shock Sensitivity Characteristics of Methylacetylene, Propadiene and Propylene Mixtures, Explosives Research Laboratory, Bureau of Mines Report No. 3849, Cooperative Agreement with Dow Chemical Company 14-09-0050-2152, Bureau of Mines, Pittsburgh Research Center, Cochrans Mill Road, P.O. Box 18070, Pittsburgh, PA 15236-0070. Journal of Chemical Engineering Data, 9, no. 3, 467-472 (July 1964). American Chemical Society, 1155 16th Street NW, Washington, DC 20036. 

Properties Colorless, liquefied gas. D (liquid) 0.576 (15/15C), boiling range -39 to -20C, flame temperature (in oxygen) 2925C. A mixture containing 60-66.5% methylacetylene and propadiene, with the balance being propane and butane. 

MAPP Gas is a stabilized mixture of methy-lacetylene and propadiene. Alkane and alkene hydrocarbons are added as stabilizers. The stabilizers serve to render the methylacetylene and propadiene shock insensitive and to ensure that their concentrations remain nearly uniform at all times during vaporization of the mixture [1]. 

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