Syna Epoxy 21 (UVR6110, ERL4221)

Chemical Name: 3,4-Epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate
Molecular Formula: C14H20O4
Molecular Weight: 252.31 g/mol
CAS No: 2386-87-0
EC No: 219-207-4
Synonyms: 7-oxabicyclo[4.1.0]hept-3-ylmethyl 7-oxabicyclo[4.1.0]heptane-3-carboxylate


Molecular Structure


Syna-Epoxy 21 is miscible with a wide range of organic solvents, including acetone, ethanol, and benzene. It’s low viscosity and good fluidity makes it suitable for use in bulk manufacturing. The long term stability at ambient temperature is very good. It will react in the presence of acid anhydride curing agents at higher temperature. With above 200℃ martin heat resistance, the cured product is suitable for use at high temperatures between 200-250℃ for long periods.

Syna-Epoxy 21 can be used as a casting resin, in reinforced plastics and solvent-free adhesive giving outstanding performance for UV resistance and anti-radiation properties. It is a unique structure which also gives increased alkali and water resistance.

            Product Specification:

Term Specification
Appearance Colorless to pale-yellowish Liquid
Assay >= 90%
Epox equivalent Weight (Gm/Eq) 131 - 143
Color(Pt-Co) <= 100
Viscosity @ 25°C (CPS) 300.0 - 450.0
Specific gravity @ 25°C 1.1670 - 1.1820
Printable TDS version  SDS