PENTACOSANE

YKNWIILGEFFOPE-UHFFFAOYSA-N

n-Pentacosane

Pentacosane, analytical standard

AC1L1ZJ3

Tetracosane, methyl-

BON9H94Y8V

Pentacosane, 99%

UNII-BON9H94Y8V

P0139

CTK0J1999

S0297

HSDB 8355

LP002884

NSC158663

DTXSID2060882

CHEBI:32938

ZINC6920418

CC-33089

TL8004354

ANW-42125

TRA0049053

MFCD00009353

LMFA11000582

C-24770

AI3-36478

NSC 158663

NSC-158663

TR-021692

RTR-021692

DB-054365

ST45022218

AKOS015843190

FT-0632671

I14-19387

n-Pentacosane, 99% 1g

629-99-2

CH3-[CH2]23-CH3

EINECS 211-123-6

28503-88-0

MolPort-003-929-240

2A4605C9-A088-458C-AD58-AA987FF6C408

The Henry's Law constant for pentacosane is estimated as 370 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that pentacosane is expected to volatilize rapidly from water surfaces(2). 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 1.9 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)(3) is estimated as 7.4 days(SRC). However, adsorption to sediment and suspended solids is expected to attenuate volatilization(SRC). The estimated volatilization half-life from a model pond is greater than 2 years if adsorption is considered(4). Pentacosane is not expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 1.51X10-6 mm Hg(5).
Literature: (1) Meylan WM, Howard PH; Environ Toxicol Chem 10: 1283-93 (1991) (2) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (3) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of Nov 17, 2016: http://www2.epa.gov/tsca-screening-tools (4) US EPA; EXAMS II Computer Simulation (1987) (5) Perry RH, Green D; Perry's Chemical Handbook. Physical and Chemical Data 6th ed., New York, NY: McGraw Hill (1984)

In water, 2.046X10-8 mg/L at 25 deg C (est)
Literature: US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of Nov 17, 2016: http://www2.epa.gov/tsca-screening-tools
Literature: #Soluble in benzene, chloroform
Literature: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-436

The Koc of pentacosane is estimated as 1.2X10+7(SRC), using an estimated log Kow of 12.62(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that pentacosane is expected to be immobile in soil.
Literature: (1) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of Nov 17, 2016: http://www2.epa.gov/tsca-screening-tools (2) Swann RL et al; Res Rev 85: 17-28 (1983)