Allene CAS NO.463-49-0

product information

allene basic information

product name:	allene
synonyms:	1,2-propadiene;ch2=c=ch2;propa-1,2-diene;propadiene, inhibited;propadiene,inhibited;sym-allylene;allene;dimethylene methane
cas:	463-49-0
mf:	c3h4
mw:	40.06
einecs:	207-335-3
product categories:
mol file:	463-49-0.mol

allene chemical properties

melting point	−136 °c(lit.)
boiling point	-34 °c
density	0,647 g/cm3
vapor density	1.42 (20 °c, vs air)
vapor pressure	6795 mm hg ( 21 °c)
storage temp.	2-8°c
cas database reference	463-49-0(cas database reference)

safety information

hazard codes	f+,f
risk statements	12
safety statements	9-16-33
ridadr	un 2200 2.1
wgk germany	3
f	17
hazard note	flammable
tsca	t
hazardclass	2.1

msds information

provider	language
sigmaaldrich	english

allene usage and synthesis

general description	a colorless flammable gas. may become unstable. not toxic but asphyxiation may occur because of displacement of oxygen. under prolonged exposure to fire or heat the containers may rupture violently and rocket.
air & water reactions	highly flammable.
reactivity profile	the unsaturated aliphatic hydrocarbons, such as propadiene, are generally much more reactive than the alkanes. strong oxidizers may react vigorously with them. reducing agents can react exothermically to release gaseous hydrogen. in the presence of various catalysts (such as acids) or initiators, compounds in this class can undergo very exothermic addition polymerization reactions. many of these compounds undergo autoxidation upon exposure to the air to form explosive peroxides. violent explosions have occurred at low temperatures in ammonia synthesis gas units. these explosions have been traced to the addition products of dienes and oxides of nitrogen, produced from the interaction of nitrogen oxide and oxygen [bretherick, 1995].
health hazard	vapors may cause dizziness or asphyxiation without warning. some may be toxic if inhaled at high concentrations. contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. fire may produce irritating and/or toxic gases.
fire hazard	extremely flammable. will be easily ignited by heat, sparks or flames. will form explosive mixtures with air. silane will ignite spontaneously in air. may polymerize explosively when heated or involved in a fire. vapors from liquefied gas are initially heavier than air and spread along ground. vapors may travel to source of ignition and flash back. cylinders exposed to fire may vent and release flammable gas through pressure relief devices. containers may explode when heated. ruptured cylinders may rocket.

allene preparation products and raw materials

preparation products

malononitrile

company information

henan sunlake enterprise corporation is located in henan province , the central plain of china , which enjoys favorable geogeaphical position and convenient transportion, the com[any was established in june. 1998 , until now having more than 18 years experience in manufacturing & exporting chemical raw material .

sunlake is a professional manufacturer engaged in producing and selling chemicals,including organic & inorganic chemicals , pigments & dyestuffs , water treatment chemicals , food & feed additives and others . these products have been being well exported to europe , southeast asia , the middle east , africa , south america and some other countries and areas.

we sincerely welcome foreign friends to visit our plant for cooperation. with the idea of "quality first,credit priority, excellent service", we are highly acknowledged by customers for good quality and competitive price. more importantly , the company has a strong r & d team, who are professional engineers and scholars with ph. d. .so we are confident to serve you better with our high - quality products and professional team.

we are taking great efforts to provide our customers with demanded goods and professional services, and continuously improve our core ability of competition and get the momentum for sustainable development, and finally make us being a reliable and professional wupplier in international market.

we welcome any serious inquiries from all customers of the world, and sincerely hope to cooperate.