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Isoprene

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Products Intro: Product Name:Isoprene
CAS:78-79-5
Company Name: Energy Chemical  Gold
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Products Intro: Product Name:Isoprene
CAS:78-79-5
Package:100Ml,500Ml
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Products Intro: Product Name:Isoprene
CAS:78-79-5
Package:25L;50L;100L;25kg;50kg;100kg
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Products Intro: Product Name:Isoprene (stabilized with TBC)
CAS:78-79-5
Purity:95.0%(GC) Package:500ML
Company Name: Meryer (Shanghai) Chemical Technology Co., Ltd.  
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Products Intro: Product Name:Isoprene (stabilized with TBC)
CAS:78-79-5
Purity:>99.0%(GC) Package:25ML;500ML Remarks:I0160
Isoprene Basic information
Description References
Product Name:Isoprene
Synonyms:BUFFER SOLUTION, PH 4.63;BUFFER SOLUTION, PH 4.0, ACETATE;1,3-Butadiene,2-methyl-;2-methyl-3-butadiene;2-Methylbutadiene;2-methyldivinyl;2-methylethene;3-Butadiene,2-methyl-1
CAS:78-79-5
MF:C5H8
MW:68.12
EINECS:201-143-3
Product Categories:Acyclic;Alkenes;Building Blocks;Chemical Synthesis;Humulus lupulus (Hops);Nutrition Research;Organic Building Blocks;Phytochemicals by Plant (Food/Spice/Herb)
Mol File:78-79-5.mol
Isoprene Structure
Isoprene Chemical Properties
Melting point 323-329 °C(lit.)
Boiling point 34 °C(lit.)
density 0.681 g/mL at 25 °C(lit.)
vapor density 2.35 (vs air)
vapor pressure 8.82 psi ( 20 °C)
refractive index n20/D 1.422(lit.)
Fp −65 °F
storage temp. 2-8°C
solubility 0.7g/l
form solid
color Clear colorless to very pale yellow
explosive limit1-9.7%(V)
Water Solubility 0.07 g/100 mL
FreezingPoint -145.96℃
λmax231nm(neat)(lit.)
Merck 14,5201
BRN 969158
Stability:Stability Extremely flammable. Readily forms explosive mixtures with air. Note low flash point, low boiling point, high vapour pressure. Unstable - prone to spontaneous polymerization. May contain a polymerization inhibitor. Incompatible with strong oxidizing agents.
CAS DataBase Reference78-79-5(CAS DataBase Reference)
NIST Chemistry Reference1,3-Butadiene, 2-methyl-(78-79-5)
EPA Substance Registry System1,3-Butadiene, 2-methyl-(78-79-5)
Safety Information
Hazard Codes F+,T,N
Risk Statements 45-12-52/53-68-51/53
Safety Statements 53-45-61-36/37-16
RIDADR UN 1218 3/PG 1
WGK Germany 1
RTECS NT4037000
Autoignition Temperature428 °F
TSCA Yes
HS Code 2901 24 00
HazardClass 3
PackingGroup I
Hazardous Substances Data78-79-5(Hazardous Substances Data)
ToxicityLD50 for mice: 144 mg isoprene vapors/l air (Gostinskii)
MSDS Information
ProviderLanguage
SigmaAldrich English
ACROS English
ALFA English
Isoprene Usage And Synthesis
DescriptionIsoprene occurs in nature and it is produced by many plants. Its polymers are the main component of natural rubber. The most important application of isoprene is to manufacture polymers and copolymers. Polyisoprene, a synthetic rubber made from isoprene, is used in a wide variety of rubber applications including medical equipment, baby bottle teats/nipples, toys, shoe soles, tires, elastic films, threads for golf balls or textiles, adhesives, paints, and coatings. Copolymer butyl rubber, made from isobutene with a small amount of isoprene, has excellent impermeability to gases and is used in inner tubes. Another copolymer styrene-isoprene rubber is used in pressure sensitive adhesives. Isoprene is also used as a chemical intermediate.
References
  1. https://en.wikipedia.org/wiki/Isoprene
  2. http://www.shell.com
  3. http://www.dgmk.de/petrochemistry/abstracts_content16/Reyer.pdf
  4. https://pubchem.ncbi.nlm.nih.gov 
  5. https://www.lyondellbasell.com
Chemical Propertiescolourless liquid with an aromatic odour
UsesIsoprene is used in the synthesis of rubber through a polymer synthetic route.
DefinitionChEBI: A hemiterpene with the formula CH22C(CH3)CH2CH2; the monomer of natural rubber and a common structure motif to the isoprenoids, a large class of other naturally occurr ng compounds.
Usesmanufacture of "synthetic" natural rubber, butyl rubber. Copolymer in the production of synthetic elastomers.
General DescriptionA clear colorless liquid with a petroleum-like odor. Density 5.7 lb / gal. Flash point -65°F. Boiling point 93°F. May polymerize exothermically if heated or contaminated. If polymerization takes place inside a closed container, the container may rupture violently. Less dense than water and insoluble in water. Vapors heavier than air.
Air & Water ReactionsHighly flammable. Insoluble in water.
Reactivity ProfileISOPRENE may react vigorously with strong oxidizing agents. May react exothemically with reducing agents to release hydrogen gas. May undergo exothermic addition polymerization in the presence of various catalysts (such as acids) or initiators. Undergoes autoxidation upon exposure to the air to form explosive peroxides. Mixing isoprene in equal molar portions with any of the following substances in a closed container caused the temperature and pressure to increase: chlorosulfonic acid, nitric acid (70%), oleum, sulfuric acid (90%) [NFPA 1991].
HazardHighly flammable, dangerous fire and explosion risk. Irritant. Possible carcinogen.
Health HazardVapor produces no effects other than slight irritation of the eyes and upper respiratory tract. Liquid may irritate eyes; like gasoline.
Purification MethodsReflux it with sodium then distil it from sodium or NaBH4 under nitrogen, and pass it through a column containing KOH, CaSO4 and silica gel. tert-Butylcatechol (0.02% w/w) is added, and the isoprene is stored in this way until redistilled before use. The inhibitor (tert-butylcatechol) in isoprene can be removed by several washings with dilute NaOH and water. The isoprene is then dried over CaH2, distilled under nitrogen at atmospheric pressure, and the fraction distilling at 32o is collected. Store it under nitrogen at -15o. [Beilstein 1 H 252, 1 IV 1001.]
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