ISOBUTANE

2-Methylpropane

75-28-5

Trimethylmethane

Propane, 2-methyl-

1,1-Dimethylethane

iso-butane

R 600a

Caswell No. 503A

HSDB 608

R-600a

EINECS 200-857-2

Isobutane [NF]

UNII-BXR49TP611

EPA Pesticide Chemical Code 097101

BXR49TP611

CHEBI:30363

E943b

(CH3)2CH-CH3

DTXSID1026401

EC 200-857-2

Isobutane (NF)

ISOBUTANE (II)

ISOBUTANE [II]

ISOBUTANE (MART.)

ISOBUTANE [MART.]

2-METHYL-D3-PROPANE-1,1,1,3,3,3-D6

dimethylethane

Methylpropane

iso butane

tert-Butane

2-methylpropyl

i-Butane

H-tBu

ISOBUTANE [FCC]

iso-C4H10

2-Methylpropane, 99%

ISOBUTANE [HSDB]

ISOBUTANE [INCI]

ISOBUTANE [VANDF]

2-Methylpropane, puriss.

PROPANE, 2-METHYL

ISOBUTANE [WHO-DD]

DTXCID806401

2-Methylpropane, 99.995%

CHEMBL2106398

DTXSID20166894

DTXSID60963546

MFCD00008926

AKOS015917447

UN 1969

DB-360584

I0090

NS00007329

D04623

Q407225

The Henry's Law constant for isobutane is estimated as 1.19 atm-cu m/mole(SRC) derived from its vapor pressure, 2610 mm Hg(1), and water solubility, 48.8 mg/L(2). This Henry's Law constant indicates that isobutane is expected to volatilize rapidly from water surfaces(3). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(3) is estimated as 47 minutes(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(3) is estimated as 3 days(SRC). Isobutane's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The potential for volatilization of isobutane from dry soil surfaces may exist(SRC) based upon its vapor pressure(1).

The Koc of isobutane is estimated as 250(SRC), using a log Kow of 2.76(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that isobutane is expected to have moderate mobility in soil.