59355-75-8

Basic information

• Product Name: Methylacetylene and propadiene mixture,stabilized
• Synonyms: Methylacetylene and propadiene mixture,stabilized;Propyne and allene mixtures,stabilized;MAPD;MAPP;Methyl acetylene propadiene;Methyl acetylene propadiene mixture.;PROPYL-ALLENEMIXTURE(MAPPGAS);PROPYNE-ALLENEMIXTURE
• CAS NO: 59355-75-8
• Molecular Formula: C6H8
• Molecular Weight: 80.12772
• Mol File: 59355-75-8.mol
• Article Data: 0

Chemical Properties

• Appearance: /
• Vapor Pressure: 4570mmHg at 25°C
• CAS DataBase Reference: Methylacetylene and propadiene mixture,stabilized(CAS DataBase Reference)
• NIST Chemistry Reference: Methylacetylene and propadiene mixture,stabilized(59355-75-8)
• EPA Substance Registry System: Methylacetylene and propadiene mixture,stabilized(59355-75-8)

Safety Data

• Hazardous Substances Data: 59355-75-8(Hazardous Substances Data)

Usage

Chemical Properties

Colorless, liquefied gas.A mixture containing 60–66.5% methylacetylene and propadiene, with the balance being propane and butane.

Uses

Industrial fuel gas for cutting, welding, brazing, heat treating, and metallizing.

General Description

Methylacetylene-propadiene stabilized is a colorless gas with an acetylene like odor. Methylacetylene and propadiene mixture,stabilized is shipped as a liquefied gas under its vapor pressure. Contact with the liquid can cause frostbite. Methylacetylene and propadiene mixture,stabilized is easily ignited. The vapors are heavier than air. Any leak can either be liquid or vapor. Methylacetylene and propadiene mixture,stabilized can asphyxiate by the displacement of air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket.

Air & Water Reactions

Highly flammable.

Reactivity Profile

METHYLACETYLENE-PROPADIENE GAS MIXTURE presents a dangerous fire and explosion hazard when exposed to heat, flame or sparks or strong oxidizing agents. The liquid material in cylinders contains about 30% propadiene. Detonation may occur at 95°C [MCA Case History No. 632]. Reacts vigorously with strong oxidizing agents. Reaction with silver nitrate forms an acetylide igniting at 150°C [Grignard, 1935, vol. 3, p. 175]. Violent explosions occurring at low temperatures in ammonia synthesis equipment have been traced to the addition products of dienes and oxides of nitrogen produced from the interaction of nitrogen oxide and oxygen. [Bretherick, 1995].

Hazard

Flammable gas; dangerous fire risk. Toxic by inhalation. Central nervous system impairment.

Health Hazard

Simple asphyxiant. Toxicology of propadiene component not fully established. Contact with liquid may burn eyes and cause frostbite of skin.

Fire Hazard

Behavior in Fire: Containers may explode.

Safety Profile

A flammable gas mixture. To fight fire, stop flow of gas. When heated to decomposition it emits acrid smoke and irritating fumes.

InChI:InChI=1/2C3H4/c2*1-3-2/h1-2H2;1H,2H3