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75-28-5

75-28-5 structural image
Product Name: ISOBUTANE
Formula: C4H10
Synonyms: Isobutane
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Isobutane is a colorless gas with a faint petroleum-like odor. It is shipped as a liquefied gas under its vapor pressure. Contact with the liquid can cause frostbite. It is easily ignited. The vapors are heavier than air. Any leak can either be liquid or vapor. It can asphyxiate by the displacement of air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket.
Color/Form Colorless gas [Note: Shipped as a liquified compressed gas. A liquid below 11 °F]
Odor Gasoline-like or natural gas odor.
Boiling Point 10.8 °F at 760 mmHg (USCG, 1999)
Melting Point -427.5 °F (USCG, 1999)
Flash Point -117 °F (USCG, 1999)
Solubility Slight (NIOSH, 2023)
Density 0.557 at 68 °F (USCG, 1999) - Less dense than water; will float
Vapor Density 2.06 (NIOSH, 2023) - Heavier than air; will sink (Relative to Air)
Vapor Pressure 3.1 atm at 70 °F (NIOSH, 2023)
LogP log Kow = 2.76
Stability/Shelf Life Stable under recommended storage conditions.
Autoignition Temperature 890 °F (USCG, 1999)
Decomposition When heated to decomposition it emits acrid smoke and irritating fumes.
Viscosity 0.238 cP at -10 °C
Corrosivity No corrosive action on metals.
Heat of Combustion -680.84 kcal/mol at 25 °C (liquid); -685.71 kcal/mol at 25 °C (gas)
Heat of Vaporization 4.570 kcal/mol at 25 °C
Surface Tension 14.1 dyne/cm at -10 °C
Ionization Potential 10.74 eV
Refractive Index Index of refraction: 1.3518 at 25 °C/D
Kovats Retention Index 354.2 353.99 353.53 353.53 353 354 366 361.1 362 366 365 365 369 359 354 354 366 354.8 362 366 354.2 372.8 368 354 364 354.2 354 354 366 366 355 354 370 366 370 368 364
Other Experimental Properties Heat capacity at constant pressure = 23.10 cal/K-mol at 25 °C
Chemical Classes Solvents -> Aliphatics, Saturated (<C12)

SAFETY INFORMATION

Signal word Danger
Pictogram(s)

Flame
Flammables
GHS02

Gas Cylinder
Compressed Gases
GHS04
GHS Hazard Statements H220:Flammable gases
H280:Gases under pressure
Precautionary Statement Codes P410+P403:Protect from sunlight. Store in a well-ventilated place.

COMPUTED DESCRIPTORS

Molecular Weight 58.12 g/mol
XLogP3 2.1
Hydrogen Bond Donor Count 0
Hydrogen Bond Acceptor Count 0
Rotatable Bond Count 0
Exact Mass 58.078250319 g/mol
Monoisotopic Mass 58.078250319 g/mol
Topological Polar Surface Area 0 Ų
Heavy Atom Count 4
Formal Charge 0
Complexity 4.8
Isotope Atom Count 0
Defined Atom Stereocenter Count 0
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Isobutane is a colorless gas with a faint petroleum-like odor. It is shipped as a liquefied gas under its vapor pressure. Contact with the liquid can cause frostbite. It is easily ignited. The vapors are heavier than air. Any leak can either be liquid or vapor. It can asphyxiate by the displacement of air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket.

RELATED SUPPLIERS

Maharashtra Gas Co

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product:75-28-5 Isobutane 98%

Vadilal Chemicals Limited

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Bhuruka Gases Ltd

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All suppliers(3)