In the accelerating transition toward clean beauty and ISO 16128-aligned natural origin claims, cosmetic formulators face a persistent dilemma: how to secure broad-spectrum antimicrobial protection in mild, anion-sensitive systems—such as amino acid surfactant cleansers, baby wet wipes, and fragrance-free lotions—without resorting to parabens, phenoxyethanol, or formaldehyde releasers that increasingly trigger consumer scrutiny and regulatory tightening. Many green preservatives excel at one niche (e.g., only acidic pH, only leave-on, only Gram+) but fail in complex liquid emulsions or cation–nonionic mixed interfaces. AscendPro® LCG/LCG-N — Green Preservative Blend Ethyl Lauroyl Arginate HCl Caprylyl Glycol Glycerin INCI Name CAS 60372-77-2 1117-86-8 56-81-5 COSMOS APPROVED Natural Origin Index LCG 70% LCG-N 100% ISO 16128for Amino Acid Surfactant Cleansers Hair Conditioner Skin Care Lotions Creams Wet Wipes Liquid Cosmetic Formulations Recommended Level 0.5~2.0% w/w pH 3~7 from Ascend MegaBio resolves this by pre-stabilizing a synergistic pair—Ethyl lauroyl arginate HCl (LAE, a cationic amino-acid-derived antimicrobial) and Caprylyl Glycol (a multifunctional C8 diol)—in a glycerin carrier liquid. LAE disrupts microbial cytoplasmic membranes via electrostatic interaction with anionic phospholipids and inserts its lauryl chain into lipid bilayers, while caprylyl glycol compromises membrane integrity and reduces internal water activity, jointly lowering the threshold for lethal microbial inactivation across Gram-positive (Staph, Cutibacterium), Gram-negative (E. coli, Pseudomonas), yeasts, and molds. Meanwhile, the glycerin base ensures homogeneous dispersion in water-rich phases, eliminating premixing hotspots that plague powdered preservatives. But how exactly does LAE’s cationic mechanism coexist with anionic amino acid surfactants in modern sulfate-free cleansers, why does the LCG-N variant achieve 100% natural origin (ISO 16128) while LCG sits at 70%, and what makes a pre-blended liquid preservative at 0.5–2.0% w/w fundamentally easier to dose into heat-sensitive botanical emulsions than solid alternatives? Below is the full breakdown for cosmetic chemists, R&D directors, and clean-label brand owners.
Why LAE + caprylyl glycol synergy outperforms single-component green preservatives
The AscendPro® LCG/LCG-N — Green Preservative Blend Ethyl Lauroyl Arginate HCl Caprylyl Glycol Glycerin INCI Name CAS 60372-77-2 1117-86-8 56-81-5 COSMOS APPROVED Natural Origin Index LCG 70% LCG-N 100% ISO 16128 for Amino Acid Surfactant Cleansers Hair Conditioner Skin Care Lotions Creams Wet Wipes Liquid Cosmetic Formulations Recommended Level 0.5~2.0% w/w pH 3~7 from Ascend MegaBio is built on two complementary antimicrobial logics:
Cationic Membrane Disruption (LAE): Ethyl lauroyl arginate HCl is derived from L-arginine and lauric acid (GRAS building blocks). Its cationic head targets anionic microbial membranes; its C12 lauroyl tail embeds into the bilayer, causing leakage of ATP, ions, and nucleic acids. Unlike quaternary ammonium compounds that may be overly irritating, LAE’s amino-acid backbone confers lower cytotoxicity to mammalian cells and biodegradability favorable to eco-labels.
Membrane Fluidity & Water Activity Reduction (Caprylyl Glycol): Caprylyl Glycol (1,2-octanediol) inserts its hydrophobic C8 chain into membrane lipid domains, increasing disorder and permeability, while its hydroxyl groups modestly lower available water activity at the microinterface. Alone it is sub-lethal; paired with LAE, it amplifies membrane destabilization so effective kill occurs at fractions of single-active MICs.
Glycerin Vehicle for Process Simplicity: Both actives are solubilized/stabilized in glycerin to yield a clear amber liquid. This avoids the need to disperse powders (LAE powder is hygroscopic, caprylyl glycol is viscous) and enables direct pump-dosing into cooled batches (40–50°C) or even cold-process formulations, preserving heat-labile botanicals or probiotics.
Natural origin indexing and the LCG vs. LCG-N distinction
A pivotal detail of the AscendPro® LCG/LCG-N — Green Preservative Blend Ethyl Lauroyl Arginate HCl Caprylyl Glycol Glycerin INCI Name CAS 60372-77-2 1117-86-8 56-81-5 COSMOS APPROVED Natural Origin Index LCG 70% LCG-N 100% ISO 16128 for Amino Acid Surfactant Cleansers Hair Conditioner Skin Care Lotions Creams Wet Wipes Liquid Cosmetic Formulations Recommended Level 0.5~2.0% w/w pH 3~7 from Ascend MegaBio is the ISO 16128-aligned origin split:
AscendPro® LCG (70% Natural Origin): Contains standard synthetic-grade Ethyl lauroyl arginate HCl (partially synthesized despite amino-acid origin) plus caprylyl glycol and glycerin; the weighted ISO 16128natural origin index reaches ~70%, suitable for “partially natural” claims and COSMOS-approved formulations where some synthetic derivation is acceptable.
AscendPro® LCG-N New! (100% Natural Origin): Uses bio-based/full-natural-chain sourced LAE precursor route and bio-derived caprylyl glycol/glycerin to achieve 100% natural origin per ISO 16128. This supports “naturally derived preservative,” “free-from synthetic actives,” and stringent clean-beauty narratives while retaining the same LAE+diol synergy and COSMOS APPROVED status.
COSMOS Alignment: Both variants carry COSMOS APPROVED certification (via ECOCERT/BDIH pathways), critical for European and global natural cosmetics requiring preservative compliance without banned substances.
Key characteristics and formulation data (From AscendPro® LCG/LCG-N Page)
Product Name: AscendPro® LCG/LCG-N
Descriptor: Green Preservative Blend
INCI Name: Ethyl lauroyl arginate HCl, Caprylyl Glycol, Glycerin
CAS Numbers: 60372-77-2 (Ethyl lauroyl arginate HCl), 1117-86-8 (Caprylyl Glycol), 56-81-5 (Glycerin)
EC Numbers: 434-630-6, 214-254-7, 200-289-5
Appearance: Colorless to pale yellow transparent liquid (25°C)
Natural Origin Index (ISO 16128): AscendPro® LCG: 70%; AscendPro® LCG-N: 100%
Recommended Level: 0.5~2.0% (w/w) depending on water activity, pH, and preservative challenge severity
Applicable pH Range: 3~7 (optimal antimicrobial window for LAE; caprylyl glycol stable wider, but blend rated conservatively)
Certification: COSMOS APPROVED
Compatible Systems: Amino acid surfactant cleansers (anionic/cationic mixed tolerance), non-ionic systems, mild sulfate-free shampoos, baby washes, hair conditioners, skin care lotions/creams, wet wipes, facial mists
Restrictions: Follow LAE regulatory limits (see AscendPro® LAE-20 guidance); caprylyl glycol per AscendPro® CG; avoid highly oxidative or extreme pH (>7) long-term storage; not for lip/oral/spray products beyond regional limits
Supplier: Ascend MegaBio (en.ascend-megabio.com), Nanjing/Shanghai, China
Application scenarios and compatibility notes
Amino Acid Cleansers / Baby Washes: These anionic-rich, low-irritation systems are vulnerable to Pseudomonas if under-preserved. LAE’s cationic nature is tolerated at 0.5–1.0% in presence of amino acid surfactants (e.g., sodium cocoyl glutamate) due to micelle shielding; caprylyl glycol boosts efficacy without sting. Add at <50°C to avoid LAE hydrolysis (pH 3–7 stable).
Hair Conditioners / Cream Rinses: Cationic conditioners (BTMS, behentrimonium chloride) coexist with LAE since both are cationic—no precipitation risk. The blend protects water-rich rinses from mold; glycerin aids humectant positioning.
Skin Care Lotions / Creams / Facial Emulsions: In O/W emulsions with non-ionic emulsifiers (cetearyl alcohol + polysorbate), the liquid blend disperses uniformly in the aqueous phase. 0.5–1.5% suffices for typical domestic markets; up to 2.0% for high-water-activity wipes or tropical climate distribution.
Wet Wipes / Nonwoven Impregnation: Liquid preservative blend can be part of the impregnation bath; glycerin also cushions skin feel. LCG-N 100% natural origin appeals to baby wipe or intimate wipe claims.
Formulation integration workflow
Assess Water Activity & pH: Confirm formula pH 3–7; if >7, consider alternative or acidify phase. High water activity (>0.95) may need upper 1.0–2.0% dosing.
Cool Batch to ≤50°C: Add AscendPro® LCG/LCG-N to aqueous phase (or whole emulsion post-emulsification) with gentle stirring. Avoid prolonged >60°C hold which may hydrolyze LAE ester linkage over time.
Homogenize Briefly: Ensure uniform distribution; glycerin carrier aids immediate wetting—no clumping.
Challenge Test Early: Use ISO 11930or USP <51>panel (S. aureus, E. coli, P. aeruginosa, C. albicans, A. brasiliensis) at target dose; adjust ±0.2% if borderline.
Stability & Claim Lock: 3-month accelerated (40°C/75% RH) + real-time; document natural origin % (LCG vs LCG-N) for ISO 16128 declaration and COSMOS dossier.
Sourcing checklist for formulators and procurement
When requesting a quotation/sample for AscendPro® LCG/LCG-N — Green Preservative Blend Ethyl Lauroyl Arginate HCl Caprylyl Glycol Glycerin INCI Name CAS 60372-77-2 1117-86-8 56-81-5 COSMOS APPROVED Natural Origin Index LCG 70% LCG-N 100% ISO 16128 for Amino Acid Surfactant Cleansers Hair Conditioner Skin Care Lotions Creams Wet Wipes Liquid Cosmetic Formulations Recommended Level 0.5~2.0% w/w pH 3~7 from Ascend MegaBio:
✅ Specify variant — AscendPro® LCG (70%) vs LCG-N (100% natural) per your brand claim; impacts cost and certificate wording.
✅ Request COA & certifications — CAS/EC alignment, purity, heavy metals, COSMOS approval letter, ISO 16128 calculation sheet from Ascend MegaBio.
✅ Clarify pH & water activity — share approximate formula pH and AW to confirm 3–7 suitability and dose recommendation.
✅ Ask for compatibility guidance — high-anion surfactant % (e.g., SLES-free amino acid blends), essential oil % (some terpenes may interact with cationic LAE).
✅ Confirm regulatory scope — destination market (EU, US, CN, ASEAN) to align with LAE maximum limits (typically ≤0.8–2.0% depending on region/product type).
✅ Request sampling size — 100g/500g lab pack with MSDS/SDS for bench trial; note LAE is moisture-sensitive—store sealed, cool, dark.
Conclusion: A liquid-synergistic, ISO-aligned green preservative bridge for clean beauty
The AscendPro® LCG/LCG-N — Green Preservative Blend Ethyl Lauroyl Arginate HCl Caprylyl Glycol Glycerin INCI Name CAS 60372-77-2 1117-86-8 56-81-5 COSMOS APPROVED Natural Origin Index LCG 70% LCG-N 100% ISO 16128 for Amino Acid Surfactant Cleansers Hair Conditioner Skin Care Lotions Creams Wet Wipes Liquid Cosmetic Formulations Recommended Level 0.5~2.0% w/w pH 3~7 from Ascend MegaBio reframes preservative selection from a “necessary evil” to a claimable, process-friendly asset. By coupling amino-acid-derived cationic LAE with multifunctional caprylyl glycol in a glycerin liquid matrix, it delivers broad-spectrum kill (Gram±/yeast/mold), low-irritation compatibility with amino acid and non-ionic systems, and a choice between 70% and 100% natural origin to match brand positioning—all while being COSMOS APPROVED and dosed as a pump-ready liquid at 0.5–2.0% w/w. For formulators navigating the twin pressures of microbial safety and clean-label transparency in cleansers, lotions, wipes, and conditioners, specifying AscendPro® LCG or its 100% natural LCG-N sibling from Ascend MegaBio offers a technically coherent, regulatorily documented, and operationally simple path to preservation without legacy synthetics.