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Allene Suppliers list
Company Name: Henan DaKen Chemical CO.,LTD.
Tel: +86-371-55531817
Products Intro: Product Name:Allene
Purity:99% Package:100g,500g,1KG,10KG,100KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: 0371-55170693
Products Intro: CAS:463-49-0
Purity:99% Package:500G;1KG;5KG;25KG
Company Name: Mainchem Co., Ltd.
Tel: +86-0592-6210733
Products Intro: Product Name:Allene
Company Name: Shanghai wechem chemical co., ltd  Gold
Tel: 021-5198 7501
Products Intro: Product Name:1,2-propadiene ( Allene )
Purity:99.9+ Package:5L
Company Name: J & K SCIENTIFIC LTD.  
Tel: 400-666-7788 +86-10-82848833
Products Intro: Product Name:Allene 96% min
Purity:97% Package:25g
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
Product Categories:
Mol File:463-49-0.mol
Allene Structure
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)
refractive index 1.4169
storage temp. 2-8°C
explosive limit13%
BRN 1730774
CAS DataBase Reference463-49-0(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
Hazard Note Flammable
HazardClass 2.1
MSDS Information
SigmaAldrich English
Allene Usage And Synthesis
Chemical PropertiesAllene is colorless with a sweet odor. It is a flammable gas and may cause fl ash fi re at room temperature. Allene is the simplest member of the 1,2-diene class of compounds of hydrocarbons of the aliphatic chemical family. It is a benzene and petroleum ether. Allenes are not as stable as conjugated dienes or isolated dienes. Allene is slightly more strained than the isomeric methylactylene. Allene is chiefl y used in organic synthesis. It is incompatible with metals and oxidizing materials, therefore it is important to avoid copper and silver and their alloys when used under high pressure or temperature.
Chemical PropertiesPropadiene is a colorless, flammable gas or liquid with a sweet odor.
UsesOrganic intermediate.
DefinitionAny hydrocarbon or hydro- carbon derivative produced by substitution that has two double bonds from one carbon and to two oth- ers.
General DescriptionA 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 ReactionsHighly flammable.
Reactivity ProfileThe 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 HazardVapors 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.
Health HazardAllene is a simple asphyxiant with slight narcotic properties. Exposures to allene cause irritation to the skin and eyes, nausea, vomiting, headache, symptoms of drunkenness, suffocation, convulsions, and coma.
Fire HazardEXTREMELY 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.
Potential ExposureUsed in chemical synthesis and as a component in mixtures with methyl acetylene, which make up specialty welding gases.
First aidIf this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, includ- ing resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. If frostbite has occurred, seek medical attention immedi- ately; do NOT rub the affected areas or flush them with water. In order to prevent further tissue damage, do NOT attempt to remove frozen clothing from frostbitten areas. If frostbite has NOT occurred, immediately and thoroughly wash contaminated skin with soap and water.
ShippingUN2200 Propadiene, stabilized, Hazard Class: 2.1; Labels: 2.1-Flammable gas. Cylinders must be trans- ported in a secure upright position, in a well-ventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner.
Purification MethodsFreeze allene in liquid nitrogen, evacuate, then thaw out. This cycle is repeated several times, then the allene is frozen in a methylcyclohexane/liquid nitrogen bath and pumped for some time. It has also been purified by HPLC. [Cripps & Kiefer Org Synth 42 12 1962, Beilstein 1 IV 966.]
IncompatibilitiesExtremely flammable gas or liquid. Vapor or liquid forms explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, nitrogen oxides.
Waste DisposalReturn refillable compressed gas cylinders to supplier. Return refillable compressed gas cylinders to supplier. Nonrefillable cylinders should be disposed of in accordance with local, state and federal regulations. Allow remaining gas to vent slowly into atmo- sphere in an unconfined area or exhaust hood. Refillable- type cylinders should be returned to original supplier with any valve caps and outlet plugs secured and valve protection caps in place.
PrecautionsAllene is a flammable gas and the container must be kept stored away from open flame and smoking areas. Allene should be stored in well-ventilated areas with valve protection caps in place. The gas cylinders should not be dragged or rolled, and the compressed gas cylinders should not be refi lled without express written permission. Allene decomposes violently at increased temperature/heat and/or pressure and the containers should be protected from rupture and explosion.
Allene Preparation Products And Raw materials
Preparation ProductsMalononitrile
Tag:Allene(463-49-0) Related Product Information
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