Butyl-9,10-epoxystearate ,its register number is 106-83-2,it's called for 3-Octyl-oxiraneoctanoicacibutylester ; 9,10-Epoxy-octadecanoicacibutylester ; 9,10-Epoxyoctadecanoicacid,butylester ; 9,10-Epoxystearicacidbutylester ; Butyesterofepoxystearate ; Butyl9,10-epoxyoctadecanoate ; Butyl-9,10-epoxystearate ; butyl9,10-epoxystearate ; n-Butyl epoxystearate ; Truflex E 74 ,and so on. Butyl-9,10-epoxystearate (CAS No.106-83-2) is light yellow oily liquid.

IUPAC Name: Butyl 8-(3-octyloxiran-2-yl)octanoate
CAS: 106-83-2
Moelcualr Formula: C₂₂H₄₂O₃
Molecular Weight: 354.57
Molecular structure:
EINECS: 203-434-0
ACD/LogD (pH 5.5): 8.19 
ACD/LogD (pH 7.4): 8.19 
ACD/BCF (pH 5.5): 995822.25 
ACD/BCF (pH 7.4): 995822.25 
ACD/KOC (pH 5.5): 684016.81 
ACD/KOC (pH 7.4): 684016.81 
H bond acceptors: 3 
H bond donors: 0 
Freely Rotating Bonds: 19 
Index of Refraction: 1.456 
Molar Refractivity: 105.38 cm³ 
Molar Volume: 387 cm³ 
Polarizability: 41.77 10^-24cm³ 
Surface Tension: 33.9 dyne/cm 
Density: 0.916 g/cm³ 
Flash Point: 163.2 °C 
Enthalpy of Vaporization: 68.4 kJ/mol 
Boiling Point: 428.8 °C at 760 mmHg 
Vapour Pressure: 1.47E-07 mmHg at 25°C 

 Butyl-9,10-epoxystearate (CAS No.106-83-2) is usually used as PVC plasticizer and stabilizer.

Reported in EPA TSCA Inventory.

Questionable carcinogen with experimental tumorigenic data. See also ESTERS. When heated to decomposition it emits acrid smoke and irritating fumes.

Removal in wastewater treatment of Butyl-9,10-epoxystearate (CAS No.106-83-2) can be stated as follows:
Total removal:94.02  percent
Total biodegradation:0.78  percent
Total sludge adsorption:93.24  percent
Total to Air:0.00  percent
(using 10000 hr Bio P,A,S)