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Leucidal Liquid SF MAX




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Leucidal Liquid SF MAX
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Leucidal® Liquid SF MAX

Leucidal® Liquid SF MAX is

  • Now on the Whole Foods Acceptable Premium Preservative List
  • Approved for use as an ingredient in ECOCert Certified Organic products

Leucidal Liquid SF MAX is another of Active Micro Technologies antimicrobials developed for the formulator looking to move away from synthetic preservatives containing parabens, formaldehyde donors and phenoxyethanol. Leucidal® SF MAX is the latest iteration of the Leucidal® line. Optimizing the fermentation process to tighten the specification for bacteriocins, Leucidal® SF MAX provides broad spectrum antimicrobial results with an increased degree of confidence.

Active Micro Technologies (AMT) has developed a full line of products derived from naturally occurring compounds that provide broad spectrum antimicrobial protection. As a result, these novel natural antimicrobials are considered self-preserving cosmetic actives and therefore can be used as consumer- friendly alternatives to synthetic preservatives in a wide range of cosmetic applications.

Leucidal® Liquid SF MAXis a powerful probiotic-based ingredient created by the fermentation of Lactobacillus in a defined growth medium.  Lactobacillus is one of the species of microorganisms used to produce fermented products such as sauerkraut and kimchi, a Korean dietary staple from cabbage. Like many members of the lactic acid bacteria family, Lactobacillus is capable of restricting the growth of other microorganisms by acidifying its environment.  However, in addition to acidifying its environment, Lactobacillus also produces novel antimicrobial peptides, also known as bacteriocins, that are capable of providing broad spectrum antimicrobial protection.

During the manufacturing process, lysozyme is added to the ferment filtrate to facilitate a controlled cell lysis.  This steps helps ensure the release of the antimicrobial peptides for maximized activity.

Use Recommendations

For many cosmetic formulations Leucidal® Liquid SF MAX can be used in a wide range of cosmetic products, however to ensure optimum results we recommend using the following guidelines. As with all biological materials some attention must be paid to the conditions under which Leucidal® Liquid SF MAX can be used. Incorporate the product into formulations at a pH between 3 and 8, during the cooling phase of the process at temperatures lower than 70°C. The suggested use levels are typically between 2 and 4%.

The ability of Leucidal® Liquid SF MAX to inhibit the growth of a variety of bacteria and fungi was determined used the Minimum Inhibitory Concentration (MIC) test. The results indicated Leucidal® Liquid SF MAX has the ability to provide broad spectrum antimicrobial protection (please see the Technical Data Sheet for more information).

A Double Challenge test using 2% or 4% Leucidal® Liquid SF MAX in a generic cream base formulation at pH values of 3, 5, and 7. Samples were inoculated with S. aureus, E. coli, P. aeruginosa, C. albicans, and A. brasilliensis  and incubated for 28 days. During this period, samples were periodically collected and tested for the presence of viable microorganisms.  Following the initial 28 days of incubation, the samples were re-inoculated with the microbial cultures for another 28 day period.  The results indicate that Leucidal® Liquid SF MAXhas the potential to provide effective protection for lotions and other cosmetic formulations tested at 4.0% in a generic cream base formulation at pH 5.


Key Benefits

  • Water soluble
  • Naturally derived
  • REACH Compliant
  • Broad spectrum of antibacterial activity
  • ECOcert approved ingredient in Certified Organic products
  • On the Whole Foods Acceptable Premium Preservative List

Suggested Applications

  • Skin Conditioning
  • Antimicrobial

Processing Information

Leucidal Liquid SF MAX is Salicylate Free.  It is also GMO Free and no ethoxylation, irradiation, sulphonation, hydrogenation, or ethylene oxide is used in processing.  The solvent used for extraction is simply water. There are no additional preservatives or antioxidants.

Formulation Guidelines

  • Add it to products with a pH between 3 and 8
  • Performance is best at a pH below 6
  • Add it during the cooling phase of the formulation process at temperatures lower than 70°C (158°F)
  • We recommend adding it at cool-down when your formulation temperature is below 40°C (104°F) to avoid destabilization issues.

 Use with AMTicide Coconut for added protection against yeast and mold!

We carry four Leucidal Liquid products.  Please refer to the MSDS/Technical Data Tab for more information on the differences in these products.

The choice of preservatives for personal care formulations should be carefully considered. This is especially true when using natural antimicrobials and or other “mild” antimicrobials.  We recommend that every formula undergo stability and microbial testing to ensure adequate preservation.


Recommended Usage Level: 2.0% - 4.0%
Appearance: Clear to Hazy, Colorless to Yellow Liquid
Solubility: Water Soluble
Country of Origin: USA
Shelf Life: 12 months from date of manufacture
Storage and Use: Store in a cool, dry place. This product should be stored at room temperature (23 - 25°C) in a sealed container. It should not be exposed to excessive heat or cold. Do not freeze.

INCI:  Lactobacillus Ferment

Shipping Information: HS Code 1302190000

California Prop 65 Statement: The following statement is made in order to comply with the California Safe Drinking Water and Toxic Enforcement Act of 1986. This product is not known to the State of California to cause cancer, birth defects or other reproductive harm.

Here you will find Safety Data Sheets (SDS) and Technical Data Sheets. The files are in PDF format. To access a file, click on the relevant button or the file name. For your convenience, it will open up in a new browser window.

Please note: You must have Acrobat Reader to view the files listed here. If necessary, the Acrobat Reader link will directed you to a page where it can be downloaded.

Technical Data

AMT Formulation Guide for AMT Preservatives
Leucidal Liquid SF MAX Technical Dossier
Differences in Leucidal Liquid Products

Safety Data Sheet (SDS)

Leucidal Liquid SF MAX SDS

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10-09-2018
Due to a UPS issue beyond our control, UPS is not making pickups or deliveries to Orcas Island today. All UPS shipments scheduled to ship today, will ship on Wednesday, October 10th. We apologize for the inconvenience this may cause!

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