Letheen agar is recommended to determine the phenol coefficient of quaternary ammonium compounds using Escherichia coli or Staphylococcus aureus ATCC 6538. It is used to neutralize the quaternary ammonium compounds in the testing of germicidal activity. The medium is also recommended for testing of cosmetics.
Application: For Laboratory Chemicals, Analytical Purpose, Biochemical Analysis
- Appearance: Cream to yellow homogeneous free flowing powder
- Gelling: Firm, comparable with 1.5% Agar gel
- Color and Clarity of prepared medium: Light yellow colored clear to slightly opalescent gel forms in Petri plates
- Reaction: Reaction of 3.2% w/v aqueous solution at 25°C. pH : 7.0±0.2
- Cultural Response M414: Cultural characteristics observed after an incubation at 35-37°C for 24-48 hours