Isoprene CAS NO.78-79-5

soprene Basic information

Product Name:	Isoprene
Synonyms:	1,3-Butadiene,2-methyl-;2-methyl-3-butadiene;2-Methylbutadiene;2-methyldivinyl;2-methylethene;3-Butadiene,2-methyl-1;3-methyl-1,3-butadiene;beta-Methylbivinyl
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 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
form	solid
Water Solubility	0.07 g/100 mL
FreezingPoint	-145.96℃
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 Reference	78-79-5(CAS DataBase Reference)
NIST Chemistry Reference	ACROS	English
ALFA	English

Isoprene Usage And Synthesis

Chemical Properties	colourless liquid with an aromatic odour
Usage	Isoprene is used in the synthesis of rubber through a polymer synthetic route.
Definition	ChEBI: 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.
General Description	A 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 Reactions	Highly flammable. Insoluble in water.
Reactivity Profile	ISOPRENE 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].
Health Hazard	Vapor produces no effects other than slight irritation of the eyes and upper respiratory tract. Liquid may irritate eyes; like gasoline.

Isoprene Preparation Products And Raw materials

Preparation Products	Cyclopentene-->TERPINEOL-->3-Methyl-2-buten-1-ol-->2-Methyl-2-butene-->1-Chloro-3-methyl-2-butene -->2,2-DIMETHYLCYCLOPENTANONE-->6-Methyl-5-hepten-2-one-->EXXON BUTYL RUBBER 065-->METHYLIONONE-->3-METHYL-2,5-DIHYDROTHIOPHENE-1,1-DIOXIDE
Raw materials	3-Methyl-1-butene-->2-Methylbutane-->C5 Fraction