OCTADECANE

Octadecan

Oktadekan

RZJRJXONCZWCBN-UHFFFAOYSA-N

Octadecane, analytical standard

stearyl group

n-Octadecane

ACMC-1ASVK

AC1L1XS9

N102P6HAIU

KSC273C7B

UNII-N102P6HAIU

NSC4201

Octadecane, 99%

Octadecane, n-

6494AF

C18H38

S0290

CTK1H3170

O0003

CCRIS 681

UNII-CI87N1IM01 component RZJRJXONCZWCBN-UHFFFAOYSA-N

UNII-J3N6X3YK96 component RZJRJXONCZWCBN-UHFFFAOYSA-N

HSDB 8348

n-OCTADECANE, 97%

LP085908

NSC 4201

NSC-4201

LP007710

SBB061159

DTXSID9047172

CHEBI:32926

SC-81162

AN-21552

ANW-42117

TRA0008902

KB-79522

ZINC59592152

MFCD00009007

LMFA11000581

RTR-020597

AI3-06523

ST51047213

TR-020597

UNII-33822S0M40 component RZJRJXONCZWCBN-UHFFFAOYSA-N

AKOS015903064

I14-19275

593-45-3

MCULE-2392852814

n-Octadecane, technical, 90% 1kg

EINECS 209-790-3

CH3-[CH2]16-CH3

EC 209-790-3

MolPort-002-485-390

Octadecane, purum, >=97.0% (GC)

379E5588-B955-4C35-88E0-21E7DF38DE0E

InChI=1/C18H38/c1-3-5-7-9-11-13-15-17-18-16-14-12-10-8-6-4-2/h3-18H2,1-2H

The Henry's Law constant for octadecane is estimated as 1.9X10-2 atm-cu m/mole(1) from its vapor pressure, 3.41X10-4 mm Hg(2), and water solubility, 6.0X10-3 mg/L(3). This Henry's Law constant indicates that octadecane is expected to volatilize rapidly from water surfaces(4). 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)(1) is estimated as 1.7 hours hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(1) is estimated as 6.3 days(SRC). However, adsorption to suspended solids and sediment is expected to attenuate volatilization(SRC). The estimated volatilization half-life from a model pond is greater than 2 years if adsorption is considered(5). Octadecane has a vapor pressure of 3.41X10-4 mm Hg and exists as a liquid under environmental conditions; therefore, octadecane may volatilize from dry soil.
Literature: (1) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of Nov 9, 2016: http://www2.epa.gov/tsca-screening-tools (2) Jensen TS; PhD Thesis: Petroleum hydrocarbons: compositional changes during biodegradation and transport in unsaturated soil. Roskilde, Denmark: Ministry of the Environment and Energy, National Environmental Research (1994) (3) Yalkowsky SH, et al; Handbook of Aqueous Solubility Data. 2nd ed., Boca Raton, FL: CRC Press p. 1184 (2010) (4) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (5) US EPA; EXAMS II Computer Simulation (1987)

The Koc of octadecane is 2.2X10+7(1). According to a classification scheme(2), this Koc value suggests that octadecane is expected to be immobile in soil.
Literature: (1) Jensen TS; PhD Thesis: Petroleum hydrocarbons: compositional changes during biodegradation and transport in unsaturated soil. Roskilde, Denmark: Ministry of the Environment and Energy, National Environmental Research (1994) (2) Swann RL et al; Res Rev 85: 17-28 (1983)