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2-Methylbutane Structure

2-Methylbutane

Chemical Properties

Melting point -160 °C
Boiling point 30 °C(lit.)
Density  0.62 g/mL at 25 °C(lit.)
vapor density  2.6 (vs air)
vapor pressure  11.17 psi ( 20 °C)
refractive index  n20/D 1.354(lit.)
Flash point −51 °C
storage temp.  2-8°C
solubility  0.048g/l
form  Liquid
pka >14 (Schwarzenbach et al., 1993)
color  Clear colorless
Odor gasoline-like odor
explosive limit 1.3-7.6%(V)
Odor Threshold 1.3ppm
Water Solubility  Miscible with water, hydrocarbons, oils, alcohol and ether.
λmax λ: 192 nm Amax: 1.00
λ: 210 nm Amax: 0.30
λ: 220 nm Amax: 0.07
λ: 240-400 nm Amax: 0.01
BRN  1730723
Henry's Law Constant (atm?m3/mol): 1.24 at 25 °C (approximate - calculated from water solubility and vapor pressure)
Exposure limits ACGIH TLV: TWA 600 ppm (adopted).
Dielectric constant 1.8(20℃)
Stability Stable. Extremely flammable. Incompatible with strong oxidizing agents. Vapour-air mixtures explosive in certain proportions. Incompatible with rubber, various plastics. The vapour, being heavier than air, may roll over surfaces and collect in low points. Note low flash point.
LogP 3.4 at 20℃
Indirect Additives used in Food Contact Substances ISOPENTANE
FDA 21 CFR 178.3010
CAS DataBase Reference 78-78-4(CAS DataBase Reference)
EWG's Food Scores 3
FDA UNII ZH67814I0O
NIST Chemistry Reference Butane, 2-methyl-(78-78-4)
EPA Substance Registry System 2-Methylbutane (78-78-4)

Safety

Symbol(GHS)
Signal wordDanger
Hazard statements H224-H304-H336-H411
Precautionary statements P210-P233-P273-P301+P310-P331-P403+P233
Hazard Codes  F+,Xn,N
Risk Statements  12-51/53-65-66-67
Safety Statements  9-16-29-33-61-62
RIDADR  UN 1265 3/PG 1
WGK Germany  2
RTECS  EK4430000
Autoignition Temperature 788 °F
TSCA  Yes
HazardClass  3
PackingGroup  I
HS Code  29011000
Hazardous Substances Data 78-78-4(Hazardous Substances Data)
NFPA 704:
4
1 0

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