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Allene

Product Name
Allene
CAS No.
463-49-0
Chemical Name
Allene
Synonyms
ALLENE;MAPPGAS;allenegas;CH2=C=CH2;PROPADIENE;Allene 96%;propardiene;Isoallylene;Allene >=95%;sym-Allylene
CBNumber
CB9853647
Molecular Formula
C3H4
Formula Weight
40.06
MOL File
463-49-0.mol
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Allene Property

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
form 
Gasunderpressure:liquefiedgas
explosive limit
13%
BRN 
1730774
CAS DataBase Reference
463-49-0(CAS DataBase Reference)
EPA Substance Registry System
Propadiene (463-49-0)
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Safety

Hazard Codes 
F+,F
Risk Statements 
12
Safety Statements 
9-16-33
RIDADR 
UN 2200 2.1
WGK Germany 
3
17
Hazard Note 
Flammable
TSCA 
T
DOT Classification
2.1 (Flammable gas)
HazardClass 
2.1
HS Code 
2901290000
Hazardous Substances Data
463-49-0(Hazardous Substances Data)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H220Extremely flammable gas

H280Contains gas under pressure; may explode if heated

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P377Leaking gas fire: Do not extinguish, unless leak can be stopped safely.

P381Eliminate all ignition sources if safe to do so.

P410+P403Protect from sunlight. Store in a well-ventilated place.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
294985
Product name
Allene
Purity
≥95%
Packaging
170g
Price
$2160
Updated
2024/03/01
SynQuest Laboratories
Product number
1300-1-03
Product name
Allene
Purity
96%
Packaging
10g
Price
$125
Updated
2021/12/16
SynQuest Laboratories
Product number
1300-1-03
Product name
Allene
Purity
96%
Packaging
25g
Price
$225
Updated
2021/12/16
Apolloscientific
Product number
OR4738
Product name
Propa-1,2-diene
Purity
96%
Packaging
25g
Price
$334
Updated
2021/12/16
Matrix Scientific
Product number
001009
Product name
Allene
Purity
96%
Packaging
25g
Price
$340
Updated
2021/12/16
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Allene Chemical Properties,Usage,Production

Description

MAPP Gas is a stabilized mixture of methylacetylene 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.
MAPP Gas is transported and stored as a liquid under its own vapor pressure. Its transportation, storage, and handling characteristics are the same as those of liquefied petroleum gas. It has a characteristic odor detectable at concentrations as low as 100 ppm in air. Stabilized liquefied MAPP Gas and MAPP Gas vapor are insensitive to shock.
Its vapor is not subject to exothermic decomposition from a 100-J energy source to 419°F (215°C) and 285 psig (1970 kPa). With a probe temperature of 825°F (441°C), the gas is stable up to 600°F (316°C) and 1100 psig (7580 kPa). Thus, it can be safely used up to full cylinder pressure.

Chemical Properties

Allene 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 Properties

Propadiene is a colorless, flammable gas or liquid with a sweet odor.

Uses

MAPP Gas is primarily used as an industrial fuel gas for oxygen-fuel gas cutting, welding, heating, wire metallizing, flame hardening, soldering, and brazing. Small amounts are used for other diverse purposes such as mold smoking, simulation of weapons firing, flame polishing of plastics, special effects, and furnace atmospheres.

Uses

  • Allene is extensively used in a variety of photochemical, thermal, and transition metal-mediated cycloadditions.
  • It can be lithiated to obtain allenyllithium which reacts with alkyl halides to afford terminal allenes.
  • Additional application includes the preparation of reagents such as isopropenylsilanes and isopropenylstannanes by reacting with stannyl and silyl cuprates respectively.

Uses

Organic intermediate.

Definition

Any hydrocarbon or hydro- carbon derivative produced by substitution that has two double bonds from one carbon and to two oth- ers.

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.

Health Hazard

Allene 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 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.

Materials Uses

Piping systems for MAPP Gas must be made of steel as stated in NFPA 51, Standard for the Design and Installation of Oxygen-Fuel Gas Systems for Welding, Cutting, and Allied Processes. Schedule 40 pipe is suitable if joints are welded. Schedule 80 pipe is recommended for threaded joints. In no case shall threaded joints be welded after assembly. Fittings may be rolled, forged or cast steel, malleable iron, or modular iron. Gray or white cast iron fittings must not be used.

Potential Exposure

Used in chemical synthesis and as a component in mixtures with methyl acetylene, which make up specialty welding gases.

Physiological effects

The toxicity of MAPP Gas is very slight, but high concentrations (5000 ppm) can have an anesthetic effect or cause nausea. Contact with MAPP Gas vapor causes no adverse effects on the eyes or skin. Contact with MAPP Gas liquid may cause frostbite.
The strong odor of MAPP Gas (detectable at 100 ppm and objectionable at 1000 ppm) should provide sufficient warning to prevent exposure. The strong odor also serves as a means of avoiding exposures above the lower detectable odor limit in air.

storage

MAPP Gas should be treated with the same care and caution as any other flammable gas. Cylinders in storage or use should always be secured in an upright position. Do not transport cylinders in a closed vehicle.
MAPP Gas cylinder storage inside buildings, except those in actual use, is limited to 368 lb (167 kg). Larger quantities must be stored outside, in a special building, or in a separate room in accordance with NFPA 51.
MAPP Gas can be used with most commonly available torches, hoses, and regulators. Acetylene regulators can be used for working pressures up to 15 psig (103 kPa). If a working pressure of more than 15 psig (103 kPa) is required, a suitable LP-gas regulator should be used. If cylinders are manifolded, do not use acetylene pigtails with dry flash arrestors. The flash arrestors are not necessary and will impede the flow of MAPP Gas.

Shipping

UN2200 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 Methods

Freeze 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.]

Incompatibilities

Extremely 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 Disposal

Return 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.

Precautions

Allene 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.

GRADES AVAILABLE

MAPP Gas is available in only one grade.

Allene Preparation Products And Raw materials

Raw materials

Preparation Products

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Allene Suppliers

Wuhan eastop Technology Co., ltd.6
Tel
027-87382885 17702779303
Fax
027-87382885
Email
service@isotopechina.com
Country
China
ProdList
311
Advantage
58
Shanghai wechem chemical co., ltd
Tel
18824865657
Fax
021-6192 7501
Email
joey.lin@wechem.cn
Country
China
ProdList
507
Advantage
58
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
021-61259108 18621169109
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
40228
Advantage
62
Wuhan Chemwish Technology Co., Ltd
Tel
86-027-67849912
Fax
86-027-87531808
Email
sales@chemwish.com
Country
China
ProdList
35896
Advantage
56
Shanghai Sinch Parmaceuticals Tech. Co. Ltd.
Tel
+86-21-54098501
Fax
+86-21-54096319
Email
sales@sinch.com.cn
Country
China
ProdList
11598
Advantage
64
Clearsynth Labs Limited
Tel
+91-22-26355700
Fax
+91-22-26355701
Email
info@clearsynth.com
Country
India
ProdList
9679
Advantage
58
Sigma-Aldrich
Tel
021-61415566 800-8193336
Email
orderCN@merckgroup.com
Country
China
ProdList
51456
Advantage
80
Shaanxi Dideu Medichem Co. Ltd
Tel
+86-029-89586680 +86-18192503167
Fax
+86-29-88380327
Email
1026@dideu.com
Country
China
ProdList
7724
Advantage
58
Hubei Jusheng Technology Co.,Ltd.
Tel
18871490254
Fax
027-59599243
Email
linda@hubeijusheng.com
Country
CHINA
ProdList
28172
Advantage
58
Hubei xin bonus chemical co. LTD
Tel
86-13657291602
Fax
027-59338440
Email
linda@hubeijusheng.com
Country
CHINA
ProdList
22963
Advantage
58
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View Lastest Price from Allene manufacturers

Career Henan Chemical Co
Product
Allene 463-49-0
Price
US $1.00/KG
Min. Order
1KG
Purity
98%-99.9%
Supply Ability
200kg
Release date
2020-01-12

463-49-0, AlleneRelated Search:


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  • Compressed and Liquefied Gases