Phone: (325)-235-4276

Toll Free: (888)-800-8771








EJ-351 is a scintillation cocktail based on highly purified dioxane and is identical to the original NE-220. It is intended primarily for alpha and beta detection in counting water-based solutions of sugars and salts as well as body fluids such as urine and blood serum. It can also be used to assay tritiated water. Since it is dioxane-based, it offers very high light output and is relatively resistant to quenching.  Water can be added to EJ-351 in quantities up to 10% of the final solution mixture.


Light Output (% Anthracene) 65
Scintillation Efficiency (photons/1 MeV e-)
Wavelength of Maximum Emission (nm) 425
Decay Time, Short Component (ns) 3.8
Specific Gravity 1.036
Refractive Index 1.442
Flash Point (°C) 12
Boiling Point (°C at 1 atm) 104
No. of H Atoms per cm3 (x1022) 5.32
No. of C Atoms per cm3 (x1022) 3.23
No. of O Atoms per cm3 (x1022) 1.14
No. of Electrons per cm3 (x1023) 2.47


EJ-351 Emission Spectrum

This website uses cookies. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). Please note that if you reject cookies, you may not be able to use all the functionalities of the site. By using our site you accept the terms of our Privacy Policy.