Octanol/water partition coefficients of toxaphene congeners determined by the 'slow-stirring' method

Document Type

Article

Publication Date

12-1-1999

Publication Title

Chemosphere

Volume

39

Issue

14

First Page

2549

Last Page

2562

Abstract

The octanol/water partition coefficients (K(OW)) for a series of technical toxaphene peaks and congeners (n = 36) and organochlorines (pentachlorobenzene (PClBz), hexachlorobenzene (HClBz), mirex and polychlorinated biphenyl congeners (CB) 105, 153 and 209) were determined using the 'slow-stirring' technique with two different concentrations at 25°C. K(OW)s of the organochlorines were consistent with published values and results from the two treatments were in good agreement, suggesting the toxaphene congener K(OW)s are accurate and precise. Log K(OW) of toxaphene components/congeners ranged from 4.77 ± 0.076 to 6.64 ± 0.074, and were significantly related to chlorine number (log K(OW) = 3.4 + [0.28* Cl], r2 = 0.44, p < 0.001). Additional variation in toxaphene congener K(OW), and likely other physical chemical properties, is due to chlorine position and the structure of the carbon skeleton. These results represent some of the first physical-chemical properties of individual toxaphene congeners.

DOI

10.1016/S0045-6535(99)00157-5

ISSN

00456535

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