Cosmetic-grade chondroitin sulfate
RUNXIN BIOTECH
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Cosmetic Grade Chondroitin Sulfate (Sodium Chondroitin Sulfate, INCI name: SODIUM CHONDROITIN SULFATE, CAS No.: 9007-28-7) is a natural sulfated glycosaminoglycan extracted and purified from animal cartilage tissue specifically for topical skincare applications. As ingredient No. 05707 in the China List of Used Cosmetic Ingredients, it represents the highest purity grade of chondroitin sulfate, meticulously processed to meet stringent cosmetic industry standards for safety, purity, and efficacy.
Unlike food-grade chondroitin sulfate designed for oral joint health supplementation, cosmetic grade CS undergoes advanced multi-stage purification processes to remove impurities, proteins, and potential allergens, making it suitable for direct skin application. This premium-grade material is widely recognized in the cosmetic industry for its exceptional moisturizing properties, anti-aging benefits, skin barrier repair capabilities, and anti-inflammatory effects.
Parameter | Cosmetic Grade Chondroitin Sulfate | Food Grade Chondroitin Sulfate |
Purity | ≥95% (typically 98-99%) | 90-95% |
Microbial Control | Total aerobic count <100 CFU/g; pathogens absent | Total aerobic count <1000 CFU/g |
Heavy Metal Limits | Lead <2 ppm, Arsenic <1 ppm, Mercury <0.1 ppm | Lead <10 ppm, Arsenic <3 ppm |
Protein Residue | <0.5% | <2% |
Endotoxin Control | Required for sensitive applications | Not required |
Particle Size | Controlled for optimal dissolution | Standard |
Application | Topical skincare, eye creams, serums, masks | Oral supplements, joint health products |
Chondroitin sulfate is not merely an exogenous additive—it exists naturally within human skin as an essential component of the extracellular matrix (ECM). Working alongside hyaluronic acid, dermatan sulfate, and heparan sulfate, it plays a crucial role in maintaining skin structure, hydration, and elasticity. Skin aging is associated with a progressive decline in sulfated glycosaminoglycan levels, directly contributing to dehydration, loss of firmness, and wrinkle formation.
The molecular structure of chondroitin sulfate features abundant negatively charged sulfate groups and hydroxyl groups that attract and bind water molecules efficiently. While hyaluronic acid is renowned for holding 1000 times its weight in water, chondroitin sulfate offers distinct advantages:
· Sustained hydration reservoir: Forms a protective film on the skin surface that reduces transepidermal water loss (TEWL) by up to 35%
· Dermal penetration: Lower molecular weight fractions penetrate deeper into the dermis, delivering hydration where collagen and elastin fibers reside
· NMF normalization: Helps restore the skin's natural moisturizing factors, providing long-term hydration improvement rather than superficial temporary effects
Clinical studies have demonstrated that formulations containing chondroitin sulfate can increase skin hydration by 27% after just four weeks of consistent application.
Chondroitin sulfate directly stimulates dermal fibroblasts to increase production of type I and type III collagen, the structural proteins responsible for skin firmness and resilience. Biopsy studies have confirmed increased dermal thickness and improved extracellular matrix organization following topical CS application.
By inhibiting matrix metalloproteinases (MMPs)—enzymes that break down collagen during aging and UV exposure—chondroitin sulfate protects existing collagen fibers from degradation, helping maintain youthful skin structure.
With its mild anti-inflammatory properties, CS soothes irritated skin, reduces redness, and calms inflammation caused by environmental stressors or harsh cosmetic ingredients. It strengthens the skin barrier function by supporting lipid bilayer integrity and promoting ceramide synthesis.
In human skin, chondroitin sulfate and hyaluronic acid naturally work in concert within the extracellular matrix. While HA is the primary space-filling molecule providing immediate hydration, CS offers structural support and prolonged moisture retention. This natural synergy inspired cosmetic scientists to combine these two glycosaminoglycans for enhanced efficacy.
The combination of chondroitin sulfate and hyaluronic acid creates a synergistic effect that exceeds the sum of individual benefits:
Benefit | HA Alone | CS Alone | HA + CS Combination |
Immediate Surface Hydration | Excellent | Moderate | Superior (15-20% improvement) |
Long-Term Moisture Retention (24h) | Good | Excellent | Outstanding (30% improvement over individual) |
TEWL Reduction | 15-20% | 25-30% | 35-40% |
Collagen Synthesis Stimulation | Weak | Moderate | Strong (2x increase) |
Anti-Inflammatory Effect | Mild | Moderate | Enhanced |
Film-Forming & Protection | Good | Excellent | Superior barrier function |
Molecular Weight Complementarity: High molecular weight HA forms an immediate protective film on the skin surface, while lower molecular weight CS penetrates deeper into the dermis for sustained activity.
Charge Interaction: The negatively charged sulfate groups of CS interact with HA's carboxyl groups, forming stable complexes that resist enzymatic degradation by hyaluronidases.
Receptor Binding Enhancement: The CS-HA complex demonstrates enhanced binding to CD44 receptors, amplifying cellular signaling for ECM component production.
Wound Healing Acceleration: Research published in the Journal of Biomedical Materials Research shows that HA/BC (chondroitin) combinations accelerate cell migration 2-fold compared to individual components in scratch assay models.
For optimal synergistic effects, we recommend the following CS:HA ratios based on product type:
· Anti-aging serums: 2:1 (CS:HA) - emphasizes collagen stimulation
· Hydrating creams/lotions: 1:1 (CS:HA) - balanced hydration approach
· Eye care products: 3:1 (CS:HA) - enhanced barrier protection for delicate skin
· Sheet masks: 1:2 (CS:HA) - immediate hydration with sustained benefits
Runxin Biotech's Cosmetic Grade Chondroitin Sulfate meets and exceeds international cosmetic ingredient standards:
Test Parameter | Specification | Test Method |
Appearance | White or off-white powder | Visual inspection |
Chondroitin Sulfate Content | ≥98.0% | CPC Titration / HPLC |
Sodium Content | 10.0-12.5% | Flame photometry |
pH (1% solution) | 6.0-7.5 | USP <791> |
Loss on Drying | ≤10.0% | USP <731> |
Residue on Ignition | 20.0-30.0% | USP <281> |
Protein Content | ≤0.5% | Lowry method |
Particle Size | 95% through 100 mesh | Sieve analysis |
Heavy Metals | ||
- Lead (Pb) | ≤2.0 ppm | ICP-MS |
- Arsenic (As) | ≤1.0 ppm | ICP-MS |
- Mercury (Hg) | ≤0.1 ppm | ICP-MS |
- Cadmium (Cd) | ≤1.0 ppm | ICP-MS |
Microbiological Quality | ||
- Total Aerobic Count | ≤100 CFU/g | USP <61> |
- Total Yeast & Mold | ≤10 CFU/g | USP <61> |
- E. coli, S. aureus, P. aeruginosa | Absent | USP <62> |
- Salmonella species | Absent | USP <62> |
Endotoxin | ≤0.5 EU/mg (optional) | LAL assay |
We offer controlled molecular weight distributions tailored to specific formulation needs:
· Standard Grade: 30,000-50,000 Da - versatile for most skincare applications
· Low Molecular Weight: <10,000 Da - enhanced skin penetration for serums
· High Molecular Weight: >80,000 Da - superior film-forming and moisture retention
Recommended usage level: 0.5-3.0%
Formulation benefits:
· Enhances collagen and elastin production
· Improves skin elasticity and firmness
· Reduces appearance of fine lines and wrinkles
· Provides long-lasting hydration without greasiness
Compatibility notes:
· Excellent compatibility with retinol, peptides, and vitamin C
· Add to water phase during formulation
· Best at pH 5.5-7.0
· Compatible with common preservatives (phenoxyethanol, ethylhexylglycerin)
Example formulation synergy: CS + Hyaluronic Acid + Palmitoyl Tripeptide-1 creates a comprehensive anti-aging matrix addressing hydration, collagen synthesis, and cellular signaling.
Recommended usage level: 0.3-2.0%
Formulation benefits:
· Reduces transepidermal water loss significantly
· Creates a non-tacky protective moisturizing film
· Improves skin texture and smoothness
· Compatible with both O/W and W/O emulsion systems
Application tip: CS enhances the moisturizing efficacy of glycerin and betaine, allowing reduction of humectant levels by 20-30% while maintaining equivalent hydration performance.
Recommended usage level: 0.5-1.5% (for eye area per cosmetic ingredient safety data)
Special advantages for eye care:
· Gentle on delicate periorbital skin
· Non-irritating formulation for sensitive eye area
· Supports fragile skin barrier around eyes
· Helps reduce appearance of fine lines and crow's feet
· Compatible with caffeine, peptides, and ceramides for dark circle and puffiness reduction
Safety assessment confirms CS is safe for eye area application at concentrations up to 1.5%.
Recommended usage level: 0.5-5.0%
Benefits in mask formulations:
· Provides instant and prolonged hydration
· Enhances active ingredient penetration
· Soothes post-procedure or sensitive skin
· Excellent solubility in essence formulations
· Non-sticky after-feel
Synergistic combinations:
· CS + HA + Hydrolyzed collagen for comprehensive hydration and firming
· CS + Centella asiatica extract for enhanced barrier repair and anti-inflammatory effects
Recommended usage level: 0.3-1.0%
Why ideal for sensitive skin:
· Low irritation potential confirmed by patch testing
· Natural origin without synthetic additives
· Anti-inflammatory properties calm redness and irritation
· Strengthens compromised skin barrier
· Suitable for post-laser, post-microneedling, and post-chemical peel applications
Recommended usage level: 0.2-1.0%
Hair care applications:
· Scalp moisturization and barrier protection
· Anti-irritant in anti-dandruff formulations
· Hair conditioning properties
· Protection from environmental damage
· Multiple source options: Bovine, chicken, or marine (shark) cartilage sources available
· Full traceability: From raw material origin to finished product, with complete documentation
· Slaughterhouse certifications: All animal sources certified healthy and disease-free
· Halal & Kosher certified: Meets international religious dietary requirements
Runxin employs proprietary multi-stage purification processes:
· Enzymatic hydrolysis: Controlled enzyme treatment preserves molecular integrity while removing impurities
· Membrane filtration: Ultrafiltration and nanofiltration ensure consistent molecular weight distribution
· Activated carbon decolorization: Removes pigments without affecting biological activity
· Ion exchange purification: Achieves >98% purity with minimal protein residue
· Customized specifications: Molecular weight, particle size, and purity levels tailored to your formulation requirements
· Technical support: In-house cosmetic scientists provide formulation guidance and compatibility testing
· Stability data: Comprehensive stability testing under various pH and temperature conditions
· Compatibility studies: Extensive testing with common cosmetic ingredients and preservative systems
· ISO 22716 certified: Cosmetic Good Manufacturing Practices (GMP)
· ISO 9001 certified: Quality management system
· REACH registered: Full compliance with EU cosmetic regulations
· CPNP notification: Ready for European market entry
· China cosmetic ingredient registered: Listed ingredient No. 05707
· Safety assessment documentation: Complete toxicological evaluation package available
Numerous scientific studies validate the skincare benefits of chondroitin sulfate:
Hydration Efficacy: A 4-week clinical study with 30 subjects showed that a 2% CS cream increased corneometer readings by 27% compared to baseline, with TEWL reduction of 31%.
Anti-Wrinkle Performance: A 12-week study demonstrated that a serum containing 1.5% CS reduced wrinkle depth by 18.8% and improved skin elasticity by 22% as measured by Cutometer®.
Barrier Repair: In a damaged skin barrier model, CS application accelerated barrier recovery by 40% compared to control, with normalization of lipid synthesis markers.
Safety Profile: Human repeat insult patch testing (HRIPT) with 5% CS showed no irritation or sensitization reactions in 200 subjects, confirming excellent skin tolerance.
· "Potential of Biofermentative Unsulfated Chondroitin and Hyaluronic Acid in Dermal Repair" (PMC8835970) - demonstrated synergistic wound healing effects
· "Novel Cosmetic Ingredient CS-AA Polyion Complex and Skin Moisturizing Effect" (Journal of Cosmetic Science) - showed CS-amino acid complexes provide superior hydration
· "Chondroitin sulfate protects from oxidative stress and modulates inflammatory response in human keratinocytes" - confirmed antioxidant and anti-inflammatory properties
· ISO 22716:2007: Cosmetic GMP certification ensuring manufacturing meets international cosmetic quality standards
· ISO 9001:2015: Quality management system certification
· Halal Certification: JAKIM-recognized Halal certification for global market access
· Kosher Certification: Orthodox Union (OU) Kosher certification
· cGMP Compliance: FDA current Good Manufacturing Practices compliant facility
Every batch of Runxin Cosmetic Grade Chondroitin Sulfate undergoes rigorous testing:
1. Identity verification: FT-IR spectroscopy matches reference standard
2. Purity assay: CPC titration and HPLC confirm ≥98% chondroitin sulfate content
3. Impurity testing: Protein, heavy metal, and microbial contamination analysis
4. Physical property evaluation: Particle size, moisture content, and pH measurement
5. Stability testing: Accelerated and real-time stability under various conditions
Each shipment includes a comprehensive Certificate of Analysis (CoA) specifying:
· Batch number and manufacture date
· All test parameters with results and specification limits
· Expiry date (24 months from manufacture when stored properly)
· Quality control manager signature and approval
A: Cosmetic grade chondroitin sulfate is most stable at pH 5.0-7.5, which aligns perfectly with the skin's natural pH. It remains functional within pH 4.0-8.0 but may experience gradual degradation outside this range.
A: Yes, it demonstrates excellent compatibility with phenoxyethanol, ethylhexylglycerin, parabens (when used), formaldehyde releasers, and organic acid preservative systems. No incompatibility has been observed with standard cosmetic preservative combinations.
A: CS is compatible with AHAs at concentrations up to 10% and BHAs up to 2%. However, we recommend pH monitoring to ensure the final formulation remains within the stable pH range.
A: Our CS powder has excellent water solubility, dissolving completely in water at concentrations up to 10% with gentle stirring. Higher concentrations (up to 20%) may require warming to 40-50°C for complete dissolution.
A: CS is compatible with xanthan gum, cellulose derivatives, carrageenan, and other gums. In some cases, it may exhibit mild synergistic thickening effects, particularly when combined with hyaluronic acid.
A: Store in tightly sealed containers in a cool, dry area (15-25°C), protected from direct sunlight and moisture. Under these conditions, the shelf life is 24 months from the date of manufacture.
A: Yes, it is stable to gamma irradiation sterilization (25-40 kGy) without significant loss of biological activity. Autoclaving is not recommended as it may cause partial depolymerization.
A: Our standard cosmetic grade CS is animal-derived (bovine, chicken, or marine sources). We are developing a biofermented chondroitin option for vegan formulations—please inquire for updates.
Ready to elevate your skincare formulations with premium Cosmetic Grade Chondroitin Sulfate? Runxin Biotech offers comprehensive support for cosmetic brands and formulators:
· 100g complimentary samples for formulation testing
· Custom sample packages with different molecular weight grades
· Co-formulated HA + CS blend samples for immediate synergy testing
· Certificate of Analysis included with all samples
· Formulation consultation with our cosmetic science team
· Compatibility testing with your specific ingredient matrix
· Stability study design and data interpretation
· Regulatory documentation support for global market entry
· Custom specification development for unique formulation needs
· MOQ: 25kg for standard grades; 100kg for custom specifications
· Production capacity: 50 tons/month to support large-scale manufacturing
· Packaging options: 25kg fiber drums with food-grade PE liners; custom packaging available
· Lead time: 5-10 business days for standard orders; 15-20 days for custom specifications
· Global shipping: Door-to-door delivery via air, sea, or express courier
Contact Runxin Biotech today to request your free Cosmetic Grade Chondroitin Sulfate samples and discover how this exceptional ingredient—especially when paired with hyaluronic acid—can elevate your skincare product performance and deliver tangible anti-aging and moisturizing benefits to your customers.
Our team of cosmetic scientists and technical specialists is ready to support your formulation development journey. Let us help you create the next generation of high-performance skincare products.
