Sodium Lauroyl Sarcosinate Surfactants

Sodium Lauroyl Sarcosinate is an anionic amino acid surfactant derived from sarcosine (N‑methylglycine) and lauric acid. It has a typical amphiphilic structure: a C12 hydrophobic lauroyl alkyl chain and a hydrophilic anionic carboxylate headgroup linked via a stable amide bond.

Working Mechanism

1. Micellization & Cleansing Above its critical micelle concentration (CMC ≈ 20–25 mM), molecules self‑assemble into micelles with hydrophobic cores encapsulating sebum, oils, and particulates, enabling rinse‑off removal.
2. Mildness Mechanism The amide‑linked nitrogen is non‑ionizable over a wide pH range, resulting in lower charge density than sulfate surfactants. This minimizes penetration into the stratum corneum and reduces disruption of lipid bilayers, preserving skin barrier integrity and lowering transepidermal water loss (TEWL).
3. pH Compatibility pKa ≈ 3.6; anionic and fully functional at pH > 5.5, matching the physiological pH of human skin and scalp. It cleanses effectively without over‑alkalization or irritation.
4. Foam & Stability Forms fine, stable foam at the air–water interface; improves foam texture, stability, and rinse feel in formulations. Compatible with nonionic, amphoteric, and other anionic surfactants for synergistic performance.
5. Biodegradation Undergoes rapid microbial breakdown via esterases and amidases into sarcosine, lauric acid, and inorganic salts; >90% biodegradation within 28 days (OECD 301), eco‑friendly.

• Acute Oral Toxicity (rat): LD₅₀ >5000 mg/kg bw → practically non‑toxic.
• Acute Dermal Toxicity (rabbit): LD₅₀ >2000 mg/kg bw → low acute risk.
• Skin Irritation: Non‑irritating at rinse‑off concentrations up to 15%; non‑sensitizing in guinea pig maximization tests (GPMT) and human repeat insult patch tests (HRIPT).
• Eye Irritation: Mild to moderate at high concentrations; well‑tolerated in finished formulations at typical use levels.
• Mutagenicity: Ames test negative; no genotoxicity reported.
• Phototoxicity: Negative; safe for daily leave‑on/rinse‑off use.
  • Regulatory Status:

    Listed in China IECIC (2021), No. 08413.

    Approved under EU Cosmetics Regulation (EC) No 1223/2009.

    CIR safe up to 15% rinse‑off, 5% leave‑on.

  • GHS Classification:

    H315: Causes skin irritation (pure powder)

    H319: Causes serious eye irritation

    H330: Fatal if inhaled (dust; avoid breathing dust)

• MSDS (SDS) – downloadable
• COA (Certificate of Analysis) per batch
• IECIC Compliance Certificate
• EU Cosmetic Ingredient Compliance Statement
• Heavy Metals & Microbial Test Report

1. Rinse‑Off Facial Cleansers

• Use Level: 5–15%
• Allowed: Normal, sensitive, acne‑prone skin
• Restrictions: Not for immediate undiluted direct contact; avoid eye contact

2. Sulfate‑Free Shampoos (Daily / Color‑Protective / Sensitive Scalp)

• Use Level: 4–12%
• Allowed: Daily use, color‑treated hair, sensitive scalp
• Restrictions: Not for leave‑on; rinse thoroughly

3. Body Wash & Shower Gel (Mild / Moisturizing / Sensitive‑Skin)

• Use Level: 3–10%
• Allowed: Adults, children ≥3 years
• Restrictions: Avoid prolonged skin contact in undiluted form

4. Baby Care Products (Shampoo / Bath / Cleanser)

• Use Level: 2–8%
• Allowed: Infants ≥6 months (formulated with other mild surfactants)
• Restrictions: Must be fully tested for ocular & skin safety; rinse immediately

5. Toothpaste & Oral Care

• Use Level: 1–3%
• Allowed: Adult & pediatric formulations
• Restrictions: Do not ingest; avoid contact with damaged oral mucosa

6. Co‑Surfactant & Foam Booster

• Use Level: 1–5%
• Allowed: Compatible with amphoteric / nonionic surfactants
• Restrictions: Not recommended with strong cationic polymers in high concentrations

1. Stable High Purity Assay ≥95% (typical 98–99%), low impurities, consistent batch‑to‑batch quality.
2. Skin‑Friendly Mechanism Amino acid structure, low irritation, barrier‑friendly, suitable for sensitive‑skin lines.
3. Strong Formulation Compatibility Synergizes with most surfactants; boosts foam, stability, and sensory profile.
4. Eco‑Certified & Sustainable Readily biodegradable, compliant with global clean beauty standards.
5. Full Regulatory Compliance Complete safety dossiers: MSDS, COA, IECIC, EU 1223/2009, CIR.
6. Flexible Supply Chain 1 kg/bag, 25 kg/drum; 7‑day lead time; air/sea/express shipping.
7. Technical Support Custom formulation guidance, stability testing, and regulatory consulting.

01.Packaging and service

Storage: Store in a dry, cool, and well-ventilated place.

Packaging: 1 kg/bag, 25 kg/drum

Delivery Time: 7 days after order placement

02.Delivery Methods

1.Express Delivery
3-5 days for shipments under 100 kg
Door-to-door service

2.Ocean Freight
Over 300 kg: Approximately 30 days. Port-to-port service requires a professional customs clearance agent.

3.Air Freight
100kg-1000kg, 5-7 days
Airport-to-airport service, requires a professional customs clearance agent

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