Dey/Engley (D/E) Neutralising Agar, Contact Plate

A general-purpose medium for use when neutralisation of antiseptics or disinfectants is required to determine bactericidal activity in a contact plate to permit direct environmental sampling


Container 55mm Plate
Pack Size 10
Shelf Life 6 weeks
Storage Temp 2-8oC
Appearance Violet, opaque or slightly translucent gel
Recommended Incubation 35 - 37oC
pH 7.7 +/-0.3

Quality Control

Organisms Ref. No Result
Bacillus subtilis ATCC 6633 NCTC 10400 >50% recovery compared to control
Escherichia coli ATCC 8739 NCIB 8545 >50% recovery compared to control
Pseudomonas aeruginosa ATCC 27853 NCTC 12934 >50% recovery compared to control
Salmonella enteritidis NCTC 5188 >50% recovery compared to control
Staphylococcus aureus ATCC 6538 NCTC 10788 >50% recovery compared to control
Full or partial neutralisation of antibacterials Chlorine 2%, Formaldehyde 0.1%, Glutaraldehyde 1%, Iodine 2%, Mercurial 1:1000, Phenol 2%, Quaternary ammonium 1:400

Supporting Documents

MSDS Download



SKU: 8325