HEPTACOSANE

BJQWYEJQWHSSCJ-UHFFFAOYSA-N

Heptacosane, analytical standard

n-Heptacosane

AC1L1XSC

Hexacosane, methyl-

ACMC-1AOG8

VP371W2GJS

M548

UNII-VP371W2GJS

C27H56

QSPL 073

QSPL 047

CTK0F9891

HSDB 8357

AK126517

LP012376

DTXSID6058637

ZINC6920430

CHEBI:32941

ANW-33237

LMFA11000574

MFCD00009862

AI3-36283

RTR-020598

TR-020598

AKOS016013111

FT-0626891

I14-59877

593-49-7

Heptacosane, >=98.0% (GC)

EINECS 209-792-4

CH3-[CH2]25-CH3

118381-38-7

4557DE11-D8CE-461B-BBA4-5A5BBDA1A670

The Henry's Law constant for heptacosane is estimated as 655 atm-cu m/mole(SRC) using a fragment constant estimation method(1). This Henry's Law constant indicates that heptacosane is expected to volatilize 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)(2) is estimated as 5.7 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)(2) is estimated as 7.7 days(SRC). Heptacosane's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). The volatilization half-life from a model pond is greater than 2 years when adsorption is considered. Heptacosane is not expected to volatilize from dry soil surfaces(SRC) based upon an extrapolated vapor pressure of 2.81X10-7 mm Hg at 25 deg C(3).
Literature: (1) US EPA; Estimation Program Interface (EPI) Suite. Ver. 4.1. Nov, 2012. Available from, as of Nov 8, 2016: http://www2.epa.gov/tsca-screening-tools (2) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (3) Perry RH, Green D; Perry's Chemical Handbook. Physical and Chemical data. 6th ed., New York, NY: McGraw-Hill (1984)

In water, 2.8X10-9 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 10, 2016: http://www2.epa.gov/tsca-screening-tools
Literature: #Insoluble in water
Literature: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-288
Literature: #Insoluble in ethanol; slightly soluble in ether
Literature: Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 95th Edition. CRC Press LLC, Boca Raton: FL 2014-2015, p. 3-288

Using a structure estimation method based on molecular connectivity indices(1), the Koc of heptacosane can be estimated to be 3.9X10+7(SRC). According to a classification scheme(2), this estimated Koc value suggests that heptacosane 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 8, 2016: http://www2.epa.gov/tsca-screening-tools (2) Swann RL et al; Res Rev 85: 17-28 (1983)