L-Cysteine, Natural Amino Acid(CAS 52-90-4)
Product Name: High-Purity L-Cysteine Natural Sulfur-Containing Amino Acid Super Anti-Oxidation Anti-Glycation Detox Brightening Anti-Aging Cosmetic Raw Material
INCI Name: L-Cysteine
Alias: Cysteine Amino Acid, Skin Detox Factor, Sulfhydryl Antioxidant, Anti-Glycation Brightening Active, Melanin Inhibiting Essence, Skin Translucent Repair Factor
CAS No.: 52-90-4
Appearance: White fine crystalline powder, pure delicate texture, uniform color, odorless, excellent water solubility and ultra-stable formula activity, outstanding temperature and pH tolerance.
Grade: Cosmetic High-Purity Biochemical Grade
Source: This product adopts pure biological fermentation raw materials and green low-temperature purification process, completely retaining the natural sulfhydryl active structure of L-Cysteine without chemical residue.
MOQ (Minimum Order Quantity): 25KG
Solubility: Excellent full water solubility, rapidly dissolved in purified water, glycerin, propylene glycol and other water-phase systems, transparent and clear solution after dissolution without precipitation, turbidity and stratification.
Storage Condition: Sealed and stored in dry, cool and ventilated warehouse at 5–25℃, strictly avoid strong light direct irradiation, high temperature and humid environment to prevent oxidation and discoloration of active ingredients. Keep tightly sealed after opening, avoid long-term air contact and moisture absorption oxidation, and ensure long-term stable detoxification, anti-oxidation and brightening anti-aging efficacy.
Shelf Life: 24 Months
L-Cysteine, Natural Amino Acid, Antioxidant, Anti-Glycation, Skin Detoxification, Melanin Inhibition, Translucent Brightening, Anti-Aging, Cosmetic Raw Material
L-Cysteine, Natural Amino Acid(CAS 52-90-4)
L-Cysteine is a high-activity natural sulfur-containing amino acid detoxification anti-oxidation anti-glycation brightening raw material.
Relying on the unique sulfhydryl active structure and endogenous glutathione activation mechanism, it integrates dual core capabilities of skin detoxification purification and super free radical scavenging.
It comprehensively solves skin turbidity dullness caused by environmental toxin deposition, oxidative darkening and glycation yellowness, and integrates multi-dimensional efficacies of detox purification, anti-oxidation anti-aging, anti-glycation de-yellowing, melanin inhibition and translucent brightening.
It can effectively metabolize skin residual toxins, block multiple aging pathways, fade stubborn dullness and uneven pigment, restore skin clean and translucent healthy texture, and is a core high-value differentiated active for upgrading high-end detox brightening and anti-glycation anti-aging functional skin care formulas.
Key Benefits
• Unique Sulfhydryl Detox, Purify Turbid Skin: As a rare sulfur-containing amino acid, it has specific heavy metal chelating and toxin metabolism capabilities, which ordinary plant ingredients do not possess. It can effectively remove residual heavy metals and metabolic waste in the skin, solve the problem of long-term turbidity and dullness caused by environmental pollution, and purify skin bottom tone.
• Super Endogenous Anti-Oxidation, Block Oxidative Aging: It is a key precursor of glutathione synthesis in the skin. Its sulfhydryl active group efficiently scavenges multi-dimensional free radicals, cuts off oxidative aging chain reaction from the source, prevents skin darkening and aging, and maintains long-term skin vitality.
• Targeted Anti-Glycation, Eliminate Stubborn Yellowing: Effectively inhibit collagen glycation cross-linking and Maillard reaction, reduce the production and accumulation of glycation yellow pigments, fundamentally improve skin wax yellow, turbidity and dullness caused by sugar erosion and environmental stress, and restore bright and clear skin tone.
• Regulate Melanin, Uniform Translucent Brightening: Mildly and effectively inhibit the activity of tyrosinase, block melanin synthesis and precipitation, fade local pigmentation and uneven dullness, achieve natural translucent brightening without false white, and refine skin texture.
• High Stability & Wide Formula Compatibility: Natural biological source, mild and non-irritating for all skin types; ultra-wide pH adaptation and excellent high-temperature resistance, no decomposition and inactivation during formula processing, low debugging difficulty and suitable for industrial mass production.
• Differentiated Track, High Product Premium: Fill the market gap of amino acid detox brightening active ingredients, break the single efficacy limitation of traditional antioxidant brightening raw materials, create exclusive "detox + anti-oxidation + anti-glycation" full-effect selling points, and greatly enhance product market competitiveness.
Applications
• Skin Detox Purification Brightening Series: Core detox active for polluted and stressed dull skin, metabolize residual toxins and heavy metals, purify skin turbidity, and restore translucent skin tone.
• Anti-Glycation De-Yellowing Products: Specialized anti-glycation functional active for wax yellow and turbid skin, block glycation reaction, eliminate accumulated yellow pigments, and improve sallow and dull complexion.
• High-Efficiency Antioxidant Anti-Aging Formulas: Applied in anti-aging essence and cream, activate endogenous glutathione activity, resist oxidative aging, and improve skin laxity and dullness.
• Pigment Evening Brightening Series: Suitable for uneven skin tone and local pigmentation products, regulate melanin balance, fade dull color, and make skin tone uniform and bright.
• Urban Stress Skin Repair Products: Added in daily skin care products to resist environmental pollution damage, relieve skin turbidity caused by external stress, and maintain clean and stable skin state.
• Amino Acid & Flavonoid Compound System: Perfectly compatible with myricetin, isorhamnetin, panthenol and vitamin ingredients, building a full-effect closed-loop system of detox purification, anti-oxidation, anti-glycation, brightening and anti-aging.
Certificate Of Analysis (COA)
Test Item | Standard Specification | Test Result |
Product Name | L-Cysteine | Compliant |
Appearance | White Fine Crystalline Powder | Compliant |
Purity (%) | ≥99.0% (Customizable) | 99.36% |
Loss on Drying (%) | ≤0.5 | 0.21 |
Residue on Ignition (%) | ≤0.1 | 0.05 |
Specific Rotation | +8.3° ~ +9.5° | +8.9° |
Heavy Metal (Pb) | ≤1ppm | 0.1ppm |
Arsenic (As) | ≤0.5ppm | Not Detected |
Mercury (Hg) | ≤0.1ppm | Not Detected |
Cadmium (Cd) | ≤0.1ppm | Not Detected |
Total Bacteria | ≤100CFU/g | Qualified |
Pathogenic Bacteria | Negative | Negative |
Conclusion | Conforms to cosmetic grade quality standard | Qualified |
Frequently Asked Questions (FAQ)
• Q1: What is the MOQ of L-Cysteine?
A1: The standard MOQ is 25KG, support sample orders for formula testing, detox brightening efficacy debugging, anti-glycation anti-aging formula trial production, and support customized purity specifications for mass production.
• Q2: What is the core formula positioning of L-Cysteine?
A2: It is a natural sulfur-containing amino acid full-effect functional active integrating skin detox purification, super anti-oxidation, anti-glycation de-yellowing, melanin inhibition and anti-aging firming. It is mainly used for high-end urban stress skin repair, anti-glycation brightening and high-efficiency antioxidant anti-aging formula upgrading.
• Q3: What is the recommended dosage in cosmetic formulas?
A3: Conventional detox brightening maintenance: 0.1%–0.3%; Anti-glycation de-yellowing series: 0.2%–0.5%; High-efficiency antioxidant anti-aging products: 0.1%–0.4%; Pigment evening brightening formulas: 0.05%–0.2%, adjustable according to product efficacy positioning and formula system.
• Q4: What are the advantages compared with ordinary brightening amino acids?
A4: Ordinary amino acid ingredients only have simple moisturizing or superficial brightening effects, without detoxification and efficient anti-glycation capabilities. L-Cysteine has unique sulfhydryl active structure, with exclusive heavy metal detox function, super anti-oxidation and targeted anti-glycation efficacy, which can solve skin turbidity and yellowing problems from the source, with more thorough and long-lasting efficacy.
• Q5: What raw materials is it suitable for compounding?
A5: It is highly compatible with myricetin, isorhamnetin, hesperidin, panthenol and vitamin series ingredients. The compound system can synergistically enhance detox purification, anti-oxidation anti-aging, anti-glycation de-yellowing and translucent brightening efficacy, realizing full-effect upgrading of high-end functional skin care products.
• Q6: What are the formula usage notes?
A6: Water-soluble crystalline powder, completely dissolved in water phase at normal temperature; stable in pH 4.0–9.0 and conventional light and heat environment; avoid long-term strong alkaline and excessive high-temperature environment; sealed storage after batching to prevent oxidation; suitable for all water-based and emulsified cosmetic formulas with simple industrial debugging.
• Q7: Can it provide stable supply and professional technical support?
A7: Strictly control core indicators such as purity, specific rotation, moisture content, heavy metals and microbial indicators to ensure consistent batch stability. Support long-term bulk order supply, and provide one-stop professional services including detox brightening formula optimization, anti-glycation efficacy upgrading, stress dull skin repair debugging and after-sales technical guidance.
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