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SPI-Chem ERL 4221 Epoxy Plasticizer, Vinylcyclohexene Dioxide, CAS# 2386-87-0; 2611-00-9
SPI-Chem ERL 4221 Epoxy Plasticizer, Vinylcyclohexene Dioxide, CAS# 2386-87-0; 2611-00-9
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SPI-Chem ERL 4221 Epoxy Plasticizer, Vinylcyclohexene Dioxide, CAS# 2386-87-0; 2611-00-9

Size Options for SPI-Chem ERL 4221 Epoxy Plasticizer, Vinylcyclohexene Dioxide, CAS# 2386-87-0; 2611-00-9
Size 250 ml
Item Number 02815-NA
Availability In Stock
Price  $14.00
Size 500 ml
Item Number 02815-AF
Availability In Stock
Price  $25.00
Size 100 g
Item Number 02815-AB
Availability In Stock
Price  $7.00
Chemical Formula:C14H20)O4
CAS#:2386-87-0; 2611-00-9; others not available
Formula Weight:252.3
RTECS #:Not available
Apperance:Low viscosity liquid
Color:Not available
Odor:Characteristic
Boiling Point: >250° C / >482° F
Melting Point:-70° C / -94° F
Specific Gravity (H2O = 1):1.173

This is the “replacement” for the original ERL 4206, a component of the widely used SPI-Chem® Low Viscosity Kit, Spurr Formulation.

ERL 4206 is no longer produced nor available anywhere in the world. 

Testing of ERL 4221 as a plug-in replacement for ERL 4206 indicates  that on a blind test, users cannot tell the difference.

PLEASE NOTE - the Low-Viscosity Kit recipe must be adjusted  to account for differences in properties that exist between ERL 4206 and ERL 4221.  

When using ERL 4221 as part of the Low Viscosity Spurr Formulation embedding kit, refer to  the use instructions here