ChemicalBook CAS DataBase List 513-35-9

513-35-9

Name	2-Methyl-2-butene
CAS	513-35-9
EINECS(EC#)	208-156-3
Molecular Formula	C5H10
MDL Number	MFCD00009276
Molecular Weight	70.13
MOL File	513-35-9.mol

Chemical Properties

Appearance	liquid with unpleasant odour (detection limit ca. 2 ppt)
Melting point	-134 °C (lit.)
Boiling point	35-38 °C (lit.)
density	0.835 g/mL at 25 °C
vapor density	2.4 (vs air)
vapor pressure	25.7 psi ( 55 °C)
refractive index	n20/D 1.385(lit.)
RTECS	EM7580000
Fp	−4 °F
storage temp.	Flammables area
solubility	Chloroform, Methanol (Slightly)
form	Liquid
color	Colorless
explosive limit	8.7%
Water Solubility	Miscible with alcohol, benzene, ligroin, ethylene oxide and ether. Immiscible with water.
Merck	14,607
BRN	1361353
Dielectric constant	2.1（20℃）
Stability:	Volatile
InChI	1S/C5H10/c1-4-5(2)3/h4H,1-3H3
InChIKey	BKOOMYPCSUNDGP-UHFFFAOYSA-N
SMILES	C\C=C(\C)C
LogP	2.67
Uses	Organic synthesis, hydrogenation, halogenation, alkylation, condensation reactions. less more
CAS DataBase Reference	513-35-9(CAS DataBase Reference)
NIST Chemistry Reference	2-Butene, 2-methyl-(513-35-9)
EPA Substance Registry System	513-35-9(EPA Substance)

Safety Data

Symbol(GHS)	GHS02,GHS07,GHS08,GHS09
Signal word	Danger
Hazard statements	H224-H302-H304-H336-H341-H411
Precautionary statements	P201-P210-P273-P301+P310+P331-P308+P313-P403+P233
Hazard Codes	F,Xn,N,F+
Risk Statements	R11:Highly Flammable. R22:Harmful if swallowed. R65:Harmful: May cause lung damage if swallowed. R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . R12:Extremely Flammable. R36/37/38:Irritating to eyes, respiratory system and skin . R19:May form explosive peroxides. less more
Safety Statements	S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . S9:Keep container in a well-ventilated place . S61:Avoid release to the environment. Refer to special instructions safety data sheet . S33:Take precautionary measures against static discharges . S16:Keep away from sources of ignition-No smoking . S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . less more
RIDADR	UN 2460 3/PG 2
WGK Germany	3
TSCA	Yes
HazardClass	3
PackingGroup	II
HS Code	29012900
Storage Class	3 - Flammable liquids
Hazard Classifications	Acute Tox. 4 Oral Aquatic Chronic 2 Asp. Tox. 1 Flam. Liq. 1 Muta. 2 STOT SE 3
Hazardous Substances Data	513-35-9(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

General Description

A clear colorless liquid with a petroleum-like odor. Flash point less than 20°F. Less dense than water and insoluble in water. Hence floats on water. Vapors heavier than air.

Reactivity Profile

2-METHYL-2-BUTENE(513-35-9) may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release gaseous hydrogen. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic polymerization reactions.

Air & Water Reactions

Highly flammable. Insoluble in water.

Hazard

Highly flammable, dangerous fire and explosion risk.

Health Hazard

Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution.

Description

2-Methyl-2-butene (also named as Amylene) is an alkene hydrocarbon with the molecular formula C5H10. It is a colorless to pale yellow clear liquid. It can be used as a free radical scavenger in trichloromethane and dichloromethane. It was used for the alkylation of 3-methylthiophene over a zeolitic catalyst. It was also used as a precursor of peroxyacetyl nitrate for calibration purpose.

Chemical Properties

liquid with unpleasant odour (detection limit ca. 2 ppt)

Definition

ChEBI: An alkene that is ethylene in which three of the hydrogens are replaced by methyl groups.

Preparation

2-methyl-2-butene is prepared by dehydration of tert-amyl alcohol in presence of p-toluenesulfonic acid or distillation of a catalytically cracked gasoline stream, followed by extraction with aqueous sulfuric acid at low temp.

Purification Methods

Distil amylene and collect the distillate at low temperature. It has also been distilled from sodium. FLAMMABLE. It is available in steel cylinders and has a short

Research

2-Methyl-2-butene is a trisubstituted olefin. It acts as guest and forms stable solid host-guest complexes with self-assembled benzophenone bis-urea macrocycles. The impact of active chlorine on photo-oxidation of 2-methyl-2-butene was studied. Photosensitized oxidation of 2-methyl-2-butene adsorbed on internal framework of Na-ZSM-5 zeolite was studied. Gas-phase reaction of 2-methyl-2-butene with ozone has been investigated. Kinetics of liquid-phase alkylation of 3-methylthiophene with 2-methyl-2-butene on supported phosphoric acid has been reported.

Toxics Screening Level

The initial threshold screening level (ITSL) for amylene (also called 2-methyl-2-butene) is 106 μg/m3 (annual averaging time).

References

Virginie Bellière, Christophe Geantet, Michel Vrinat, Younès Ben-Taarit, Yuji Yoshimura, Alkylation of 3-Methylthiophene with 2-Methyl-2-butene over a Zeolitic Catalyst, Energy & Fuels, 2004, vol. 18, pp. 1806-1813
D. Grosjean, Gas-phase reaction of ozone with 2-methyl-2-butene: dicarbonyl formation from Criegee biradicals, Environmental Science & Technology, 1990, vol. 24, pp. 1428-1432

Material Safety Data Sheet(MSDS)

Spectrum Detail

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