Letheen Broth, AOAC (DM315) is recommended for evaluating the bactericidal activity of quaternary ammonium compounds, and to determine the suitability of preservatives for use in cosmetic formulations, as specified by the ASTM.
Ingredients | Gms / Liter |
Part A | |
Peptic digest of animal tissue | 10.00 |
Beef extract | 5.00 |
Lecithin | 0.70 |
Sodium chloride | 5.00 |
Part B | |
Polysorbate 80 | 5.00 |
Final pH: 7.0 ± 0.2 at 25°C | |
Formula may be adjusted and/or supplemented as required to meet performance specifications |
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