PEG-40 Hydrogenated Castor Oil-CAS 61788-85-0
Product Name: Ethoxylated Hydrogenated Castor Oil (PEG-40)
Chemical Name: Polyethylene Glycol (40) Hydrogenated Castor Oil / PEG-40 Hydrogenated Castor Oil
Alternative Names: PEG-40 HCO, CO40, Polyoxyethylene 40 Hydrogenated Castor Oil, Cremophor RH 40, Eumulgin CO 40, Kolliphor RH 40
INCI Name: PEG-40 HYDROGENATED CASTOR OIL
CAS No.: 61788-85-0
EINECS No.: 500-147-5
Chemical Class: Nonionic Surfactant / PEG Derivative / Alkoxylated Alcohol
Source / Origin: Derived from hydrogenated castor oil (Ricinus communis) via ethoxylation with 40 moles of ethylene oxide; plant-based raw material
Available Specifications: PEG-20, PEG-30, PEG-40, PEG-60, PEG-80 hydrogenated castor oil (PEG-40 is the standard cosmetic grade)
Purity: ≥99.0%, Cosmetic Grade
Appearance: White to Light Yellow Paste or Waxy Solid
Odor: Slight characteristic odor, nearly odorless
Solubility: Soluble in water, ethanol, propylene glycol, and most organic solvents; dispersible in oils and fats
HLB Value: ~14-16
pH Value (1% Aqueous Solution): 5.0 - 7.0
Acid Value: ≤1.0 mgKOH/g
Saponification Value: 50 - 70 mgKOH/g
Hydroxyl Value: 55 - 75 mgKOH/g
Water Content: ≤1.0%
Heavy Metals (as Pb): ≤10 ppm
Arsenic (As): ≤2 ppm
Key Characteristics: Nonionic surfactant, excellent solubilizing performance for essential oils and fragrances, good emulsifying ability, wide pH compatibility, mild to skin, cold-processable, good electrolyte tolerance, high formulation compatibility
Storage Condition: Sealed, dry and cool ventilated environment, avoid high temperature and direct sunlight, keep away from strong oxidizing agents
Shelf Life: 24 Months under proper storage conditions
MOQ (Minimum Order Quantity): 1KG
Application: Multifunctional nonionic solubilizer, emulsifier and surfactant for cosmetics and personal care products; widely used for solubilizing essential oils, fragrances, oil-soluble actives in water-based formulations, and as emulsifier in creams and lotions
Ethoxylated Hydrogenated Castor Oil, PEG-40 Hydrogenated Castor Oil, Cosmetic Grade Solubilizer, Nonionic Surfactant, Essential Oil Solubilizer, Fragrance Solubilizer, Cosmetic Emulsifier, Castor Oil Derivative
PEG-40 Hydrogenated Castor Oil-CAS 61788-85-0
Cosmetic Grade Ethoxylated Hydrogenated Castor Oil (PEG-40) is a high-purity nonionic surfactant produced through controlled hydrogenation of castor oil followed by ethoxylation with 40 moles of ethylene oxide. As one of the most widely used solubilizers in the cosmetic industry, it excels at solubilizing essential oils, fragrances, and oil-soluble active ingredients into water-based formulations, creating clear, stable, and transparent aqueous systems.
Derived from natural castor oil, this plant-based ingredient offers excellent solubilizing efficiency while maintaining mild skin compatibility. It functions as both an effective solubilizer and a reliable O/W emulsifier, making it highly versatile across a wide range of personal care products. Its nonionic nature ensures good compatibility with most cosmetic ingredients including anionic, cationic, and amphoteric surfactants, as well as electrolytes and active ingredients. It is also cold-processable, allowing energy-efficient formulation without heating. Fully compliant with global cosmetic safety regulations, PEG-40 Hydrogenated Castor Oil is an indispensable raw material for formulating clear toners, serums, micellar waters, fragranced products, and emulsified skincare items.
Key Benefits
• Superior Solubilizing Performance: Highly effective at solubilizing essential oils, fragrances and oil-soluble actives into clear, stable water-based formulations.
• Excellent Clarity & Transparency: Produces crystal-clear aqueous solutions without cloudiness or oil separation, ideal for transparent products.
• Nonionic Surfactant: Excellent compatibility with anionic, cationic, amphoteric and nonionic cosmetic ingredients.
• Good Electrolyte Tolerance: Stable in the presence of salts and electrolytes, suitable for formulations with ionic active ingredients.
• Cold-Processable: Can be used without heating, enabling energy-efficient cold-process formulation.
• Mild & Skin-Friendly: Low irritation profile, suitable for most skin types including sensitive skin formulations.
• Plant-Based Origin: Derived from natural castor oil, renewable and sustainable raw material source.
• Versatile Functionality: Serves as solubilizer, emulsifier, surfactant, emollient and solvent - multiple functions in one ingredient.
• Wide pH Stability: Stable and effective across a broad pH range (3.0-10.0), compatible with acidic and alkaline formulations.
• Reliable Emulsifying Ability: Effective O/W emulsifier for creams and lotions, improving texture and stability.
• Cost-Effective Solubilizer: Delivers excellent solubilizing performance at relatively low use levels, offering good cost-performance ratio.
• Global Regulatory Compliance: Approved for use in cosmetics worldwide, meets EU, FDA, China and international standards.
Applications
• Fragrance & Essential Oil Solubilization: Primary solubilizer for essential oils, natural fragrances and perfume oils in toners, body mists, room sprays and water-based fragranced products.
• Clear Toners & Essences: Used in transparent toners, essences and serums to solubilize oil-soluble actives (vitamins, plant extracts) while maintaining crystal clarity.
• Micellar Waters & Cleansing Waters: Key ingredient in micellar water and cleansing water formulations for gentle oil solubilization and cleansing.
• Shampoos & Hair Care: Added to shampoos, conditioners and hair treatments to solubilize fragrances, essential oils and oil-soluble actives.
• Body Washes & Shower Gels: Incorporated into body washes, shower gels and liquid soaps for fragrance solubilization and foam enhancement.
• Creams & Lotions: Used as co-emulsifier and texture modifier in O/W creams and lotions, improving emulsion stability and skin feel.
• Makeup & Color Cosmetics: Applied in liquid foundations, makeup removers and mascaras for solubilizing and emulsifying functions.
• Bath & Body Products: Used in bath oils, bubble baths and body sprays for oil solubilization and fragrance dispersion.
• Custom Solubilizer Blends: Supports customized development of combined solubilizer systems with other surfactants for specialized applications.
Certificate Of Analysis (COA)
Test Item | Standard Specification | Test Result |
Product Name | PEG-40 Hydrogenated Castor Oil | Compliant |
INCI Name | PEG-40 HYDROGENATED CASTOR OIL | Compliant |
CAS No. | 61788-85-0 | Compliant |
Appearance | White to Light Yellow Paste / Waxy Solid | Compliant |
Odor | Slight characteristic odor | Compliant |
Purity (Assay) | ≥99.0% | 99.45% |
HLB Value | 14 - 16 | 15.2 |
pH Value (1% Solution) | 5.0 - 7.0 | 6.15 |
Acid Value | ≤1.0 mgKOH/g | 0.42 mgKOH/g |
Saponification Value | 50 - 70 mgKOH/g | 61.8 mgKOH/g |
Hydroxyl Value | 55 - 75 mgKOH/g | 65.3 mgKOH/g |
Water Content (Karl Fischer) | ≤1.0% | 0.35% |
Cloud Point (1% solution) | 75 - 85°C | 80.5°C |
Solubility in Water | Clear solution (10% solution) | Clear, fully soluble |
Ethylene Oxide Residue | ≤1 ppm | <0.5 ppm |
1,4-Dioxane | ≤1 ppm | <0.5 ppm |
Heavy Metals (as Pb) | ≤10 ppm | <5 ppm |
Arsenic (As) | ≤2 ppm | <0.5 ppm |
Lead (Pb) | ≤2 ppm | <0.3 ppm |
Mercury (Hg) | ≤1 ppm | <0.1 ppm |
Cadmium (Cd) | ≤1 ppm | <0.1 ppm |
Total Aerobic Count | ≤100 CFU/g | <10 CFU/g |
Yeast & Mold | ≤10 CFU/g | <1 CFU/g |
E. coli | Negative | Negative |
Salmonella | Negative | Negative |
Pseudomonas aeruginosa | Negative | Negative |
Staphylococcus aureus | Negative | Negative |
Source | Plant-based (Castor Oil Derivative) | Compliant |
Conclusion | Conforms to cosmetic grade quality standard | Qualified |
Frequently Asked Questions (FAQ)
• Q1: What is the MOQ of cosmetic grade PEG-40 Hydrogenated Castor Oil?
A1: The standard MOQ is 1KG, and sample orders are supported for quality inspection and formulation testing.
• Q2: What PEG specifications are available and which one should I choose?
A2: We offer PEG-20, PEG-30, PEG-40, PEG-60 and PEG-80 grades. PEG-40 is the standard cosmetic grade and most versatile for general solubilization and emulsification applications. Higher PEG numbers mean better water solubility; lower PEG numbers offer better oil solubility.
• Q3: Is PEG-40 Hydrogenated Castor Oil compliant with international cosmetic regulations?
A3: Yes, it is listed in China IECIC, EU CosIng, and approved by FDA. It is a globally accepted cosmetic ingredient with an excellent safety profile.
• Q4: What is the recommended usage level for solubilizing essential oils and fragrances?
A4: Typical use level is 0.5-5.0% depending on the oil load. A general ratio is 2-4 parts PEG-40 HCO to 1 part essential oil/fragrance. For light fragrances: 0.5-2%; for heavy essential oils: 2-5%.
• Q5: How should I properly incorporate it into my formulation for best solubilization?
A5: Method 1 (cold process): Mix PEG-40 HCO with the essential oil/fragrance first until homogeneous, then slowly add water while stirring. Method 2 (warm process): Heat both PEG-40 HCO and oil phase to 40-50°C, mix well, then add water. Always add oil to surfactant first, then add water slowly.
• Q6: Can it be used as a primary emulsifier for creams and lotions?
A6: It works well as a co-emulsifier or secondary emulsifier for O/W creams and lotions, typically used at 1-5%. For primary emulsification, it is recommended to combine it with other emulsifiers like cetearyl alcohol, glyceryl stearate, or fatty alcohol ethoxylates for a more stable emulsion system.
• Q7: Is it compatible with electrolytes and salt-containing formulations?
A7: Yes, as a nonionic surfactant, it has good electrolyte tolerance and remains stable in salt-containing formulations. However, extremely high salt concentrations may reduce its solubilizing efficiency.
• Q8: Do you support long-term stable large-batch supply?
A8: Sufficient factory capacity ensures sustainable and stable bulk supply all year round, with consistent quality across batches. We also offer custom packaging and specification options for bulk customers.
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