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| Catalog Number | CI-SC-0269 |
| Product Name | PEG-35 Castor Oil |
| CAS | 61791-12-6 |
| Description | Aacts as a liquid emollient, softener and O/W emulsifier (non-ionic) and solubilizer. Saponification Number: 65-75. |
| Appearance | Clear pale yellow liquid |
| Application | Emulsions for skin and hair care products |
| Storage | Store light-protected at a cool and dry place |
| HS Code | 3402130000 |
| INCI | PEG-35 castor oil |
| Uses | Recommended use level 1-5%. For external use only. |
PEG-35 Castor Oil serves as a versatile non-ionic solubilizer and emulsifier within the pharmaceutical, cosmetic, and feed industries. It is formulated through the reaction of ethylene oxide with castor oil, maintaining a 35:1 molar ratio. This component is specifically designed to integrate hydrophobic substances, such as fat-soluble vitamins and essential oils, into aqueous solutions. Its primary composition includes glycerol-polyethylene glycol ricinoleate and fatty acid esters of polyethylene glycol, contributing to its hydrophobic characteristics, while the polyethylene glycols and ethoxylated glycerol provide hydrophilic properties. PEG-35 Castor Oil appears as a pale yellow, oily liquid, with clarity above 26 °C and a subtle, distinctive odor. Its hydrophilic-lipophilic balance (HLB) ranges from 12 to 14, making it especially suitable for producing liquid formulations. In the cosmetics sector, it is effectively employed to solubilize perfume oils and emulsify various fatty substances, organic solvents, and additives. In aqueous isopropyl or ethyl alcohol solutions with 30-50% alcohol concentration, PEG-35 Castor Oil is an excellent solubilizer for aroma chemicals and essential oils, often requiring minimal amounts to ensure the product's natural scent is unobtrusive.
What is PEG-35 Castor Oil and what are its main components?
PEG-35 Castor Oil is a non-ionic solubilizer and emulsifier created by reacting ethylene oxide with castor oil in a molar ratio of 35 to 1. Its main component is glycerol-polyethylene glycol ricinoleate, complemented by fatty acid esters of polyethylene glycol, which form the ingredient's hydrophobic part. The hydrophilic part includes polyethylene glycols and ethoxylated glycerol.
What are the primary applications of PEG-35 Castor Oil?
PEG-35 Castor Oil is widely used as an emulsifying agent across the pharmaceuticals, cosmetics, and feedstuffs industries. It is particularly effective in creating aqueous preparations of hydrophobic substances such as fat-soluble vitamins and essential oils.
How does PEG-35 Castor Oil function in the cosmetics industry?
In cosmetics, PEG-35 Castor Oil is primarily used for solubilizing perfume oils and emulsifying fatty substances, organic solvents, and additives. It is highly effective in solubilizing aroma chemicals and ethereal oils, especially in aqueous isopropyl or ethyl alcohol with an alcohol concentration of 30-50%. Minimal additions are often sufficient, which helps mask its characteristic odor.
What are the physical characteristics of PEG-35 Castor Oil?
PEG-35 Castor Oil appears as a pale yellow, oily liquid that is clear above 26 °C. It possesses a slight yet characteristic odor and can be completely liquefied by heating to 26 °C. Its hydrophilic-lipophilic balance (HLB) ranges between 12 and 14.
In what form does PEG-35 Castor Oil appear at room temperature, and how does its form change?
At room temperature, PEG-35 Castor Oil is a pale yellow, oily liquid. It becomes entirely clear when heated above 26 °C.
How does the hydrophilic-lipophilic balance (HLB) of PEG-35 Castor Oil influence its usage?
The HLB of PEG-35 Castor Oil, which lies between 12 and 14, makes it suitable for creating stable emulsions. This balance allows it to effectively distribute hydrophobic substances in aqueous environments, affecting the degree of emulsification depending on the properties of the hydrophobic substance and the amount used.
Is the odor of PEG-35 Castor Oil significant in its applications?
Although PEG-35 Castor Oil has a slight, characteristic odor, it is often completely masked with minimal additions when used in formulations, particularly those containing alcohol concentrations of 30-50%. This makes it particularly useful in cosmetic and fragrance applications where a neutral scent is desired.
Are there any specific considerations for using PEG-35 Castor Oil in liquid preparations?
Yes, the efficiency of PEG-35 Castor Oil in liquid preparations is largely dependent on the properties of the hydrophobic substances being emulsified and the proportion of PEG-35 Castor Oil utilized. It is particularly suitable for forming stable liquid preparations in various industrial applications where hydrophobic substances need to be solubilized in aqueous environments.
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