【 Principle 】

Peptone and beef extract powder provide carbon and ammonia sources, vitamins, and growth factors; Sodium chloride maintains a balanced osmotic pressure; Phosphatidylcholine and Tween 80 can neutralize preservatives and disperse substances in emulsions. Phosphatidylcholine can neutralize quaternary ammonium salts and parabens, while Tween 80 can neutralize benzoic acid, hexachlorophenol, and formalin. The combination of the two can neutralize ethanol and ampicillin (Chlorhexidine); Agar is a coagulant for culture media; Most bacteria can reduce TTC to form easily recognizable red colonies, and TTC can also slow down the spread and growth of certain bacteria.

Main components

omposed of peptone, beef extract powder, sodium chloride, lecithin, Tween 80, agar, and distilled water.

Storage conditions and expiration date

Storage conditions: This product should be stored in a dark environment at 2-8 ℃.

Validity period: The unopened original packaging has a validity period of 3 months.

This product is a disposable product.

Detection of heat-resistant coliforms in cosmetics: According to the "Technical Specification for Safety of Cosmetics", it is used for lactose fermentation confirmation test of fecal coliforms in cosmetics samples, and is the core culture medium for controlling bacterial inspection.

Neutralizing the interference of preservatives in cosmetics: Using lecithin and Tween 80 to neutralize preservatives such as quaternary ammonium salts, phenols, alcohols, formaldehyde, etc. in cosmetics, eliminating antibacterial properties and avoiding false negative results.

Specific formula used for testing sunscreen products: In the testing of samples with strong antibacterial properties such as sunscreen cosmetics, it is often necessary to use double the concentration of this culture medium to ensure effective detection of target bacteria.

Double concentration enhanced selectivity: Using a dual ingredient formula, high concentration bile salts are used to inhibit Gram positive bacteria, and double lactose is used to increase the gas production detection rate of target bacteria.