isoprene basic information |
|
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 |
1,3-butadiene, 2-methyl-(78-79-5) |
epa substance registry system |
1,3-butadiene, 2-methyl-(78-79-5) |
|
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 |
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