Bromine Complexing Agent (MEP)

Bromine Comp. (MEP)

Chemical Name: N-Methyl-N-Ethyl Pyrrolidinium Bromide (MEP)

Formula: C7H16NBr

CAS Number: 69227-51-6

General & Use:
MEP is an effective bromine complexing agent for circulating Bromine based batteries. During batteries operations so-called “bromine fused salts” – liquid polybromide phases are formed between MEP and Br2.

Formation of immiscible polybromide complexes lowered bromine concentration in aqueous phase and therefore bromine vapor pressure strongly decreases. As a result of complexation bromine activity is reduced and this lowers the rate of corrosion in the battery.

Polybromide complexes can be stored in external storage tanks which significantly decreases rate of battery self-discharge.

Typical Properties:

Appearance Colorless to slightly yellow liquid with a slight amine odor
Vapour pressure Odorless 13 mbar @ 20°C
Boiling point/range °C 100°C
Specific gravity of 65% aqueous solution 1.19
Molecular weight 194.11

Highly soluble in water, ZnBr2 solutions, HBr, organic solvents.