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| Catalog Number | CI-SC-0525 |
| Product Name | Polymethylsilsesquioxane |
| CAS | 68554-70-1 |
| Synonyms | Silsesquioxanes, Me |
| Description | High-performing spherical silicone powder providing enhanced aesthetics and wrinkle-masking effects. It creates a non-thickening effect, has excellent water-repellency and flows freely without agglomeration, providing superior handling and processing ease. Typical particle size 4-6 micron (not nano-sized). |
| Molecular Weight | 7000 - 8000 g/mol |
| Melting Point | > 999 °C |
| Purity | 99.9% |
| Density | 1.3 g/mL |
| Solubility | Water-insoluble |
| Appearance | Fine, white powder |
| Application | Creams, foundations, lipsticks, eye shadows, eyeliners, mascara and powder products. |
| Storage | Store in a closed container at a dry place at room temperature |
| Composition | Polymethylsilsesquioxane |
| Features And Benefits | Gives skin a smooth, silky, powdery feeling and masks and blurs wrinklesEffectively absorbs sebumEnhances water repellencyProvides good surface-slip and anti-caking properties |
| GMO | GMO-free (does not contain plant-derived components) |
| HS Code | 3208100000 |
| INCI | Polymethylsilsesquioxane |
| Manufacture | Methyltrichlorosilane and methanol are used to form methyltrimethoxysilane which is then polymerized by hydrolysis and condensation to formpolymethylsilsesquioxane. |
| pH | 6.0-8.0 |
| Preservation | Preservative-free |
| Purity Grade | No purity grade applicable |
| Raw Material Source | Methyltrichlorosilane and methanol |
| Refractive Index | 1.42 |
| Uses | Typical use level 1-20%, add to oil phase of formula. For external use only. |
Polymethylsilsesquioxane is a spherical silicone resin characterized by its fine particle size and precise particle size distribution, making it a versatile ingredient in skincare and color cosmetic formulations. This powder polymer is renowned for imparting excellent lubricity, slip, and a pleasing tactile sensation, while also enhancing water repellency in products.
What is polymethylsilsesquioxane used for in cosmetics?
Polymethylsilsesquioxane is used as a film former and skin conditioning ingredient.
What form does polymethylsilsesquioxane come in?
Polymethylsilsesquioxane comes in a powder form with round particles.
What is the maximum amount of polymethylsilsesquioxane used in cosmetics?
Polymethylsilsesquioxane can be used in amounts up to 55.2% in cosmetics.
Is there any evidence of toxicity or sensitization from polymethylsilsesquioxane?
There is no evidence of toxicity or sensitization from polymethylsilsesquioxane.
How is polymethylsilsesquioxane formed?
Polymethylsilsesquioxane is formed through the condensation and hydrolysis of silicone methyltrimethoxysilane.
What are some other names for silicones?
Other names for silicones include siloxanes, silicones, and organosiloxanes.
What are the benefits of using polymethylsilsesquioxane in skincare?
Polymethylsilsesquioxane provides a protective barrier, helps retain moisture, and can temporarily fill in fine lines and wrinkles.
What are some concerns about polymethylsilsesquioxane and other silicones?
Some concerns about polymethylsilsesquioxane and other silicones include claims of skin concerns, sensitization, and skin suffocation, but these claims are not supported by research.
Can silicones penetrate the skin?
Silicones cannot penetrate the skin due to their large molecular size.
Has polymethylsilsesquioxane been deemed safe for use in cosmetics?
Yes, polymethylsilsesquioxane has been deemed safe for use in cosmetics by the Cosmetic Ingredient Review Expert Panel.
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