Forensic Applications for 1,4-Dioxane and Solvent Stabilizers - Environmental Investigation and Remediation - page 447

TABLE 9.11
Comparison of Stabilizer Fate and Transport Properties for Electrical Transformer and Dry-Cleaning Grades of Perchloroethylene

Solubility
(mg/L)

Hydrolysis
Potential

Acid Dissociation
Constant a (p K a ) at pH 7

BIOWIN-Estimated
Biodegradation Potential

Subsurface
Mobility Stabilizer log K oc

Stabilizers of dielectric l uid grade perchloroethylene for transformers
p - tert -Amyl phenol (pentaphen)

168 2.41 Low 0.00167% Weeks to months Minimal

n -Methyl pyrrole 71,900 2.16 b — Weeks to months High

−2.9

Stabilizers of dry-cleaning grade perchloroethylene
4-Methyl morpholine

Miscible 0.719 — 8.49, 7.38 Weeks to months High

Diallylamine 86,000 1.11 — 9.29 Weeks High

Tripropylene compounds c 196,000 1 — NA Weeks to months High

Cyclohexene oxide 4530 1.2 High NA Weeks Minimal

3-Methoxy propionitrile 732,000 0.186 — NA Weeks High

n -Butyl glycidyl ether 20,000 0.451 Very low 4.89 Weeks High

Perchloroethylene d 150 2.32 — — Months Moderate

Notes: See Chapter 3 for description of these parameters and BIOWIN estimates.
a A high p K a indicates that the compound may exist in a protonated form in the environment; cations generally adsorb to organic carbon and clay more strongly, thereby reducing mobil-
ity compared to that of neutral compounds.
b Italicized values were estimated by using EPIWIN.
c “Tripropylene compounds” are assumed to be tripropylene glycol monomethyl ether, also known as DOWANOL ® TPM glycol ether and ARCOSOLV ® TPM; tripropylene glycol-
mono-n-propyl ether, also known as DOWANOL ® TPnP; or tripropylene glycol mono-n-butyl ether, also known as ARCOSOLV ® TPNB or DOWANOL ® TPNB; listed values are for
tripropylene glycol monomethyl ether.
d Mass fraction = 99%.