Octamercapto POSS (HS-POSS) is an organic-inorganic hybrid nanomaterial featuring a silsesquioxane cage core with eight mercaptopropyl functional groups (-CH₂CH₂CH₂NH₂) attached to its corners. While most of the cages had a (SiO₁.₅)₈ core, some cages with a (SiO₁.₅)₁₀ or (SiO₁.₅)₁₂ core were also present.
This hybrid molecule combines the robust inorganic Si-O-Si cage structure with the high reactivity of thiol groups, enabling applications in click chemistry, polymer crosslinking, and surface functionalization. Its molecular structure provides excellent chemical reactivity, thermal stability, and interfacial modification capabilities, making it widely used in polymer reinforcement, surface modification, and functional material development.
*This product is co-developed and jointly produced with Shenzhen Institute for Advanced Polymer Materials (SIAP).
Octamercaptopropyl Polyhedral Oligomeric Silsesquioxane
1185768-96-2
| Property | Description |
| Chemical Name | Octamercaptopropyl Polyhedral Oligomeric Silsesquioxane |
| CAS Number | 1185768-96-2 |
| Molecular Weight | ~1010 g/mol |
| Appearance | Clear, colorless viscous liquid |
| Density | ~1.30 g/cm³ |
| Solubility | Soluble in chloroform, toluene, THF; slightly soluble in ethanol; insoluble in water |
| Purity | ≥ 98.0% |
The thiol groups in HS-POSS are highly reactive and capable of participating in a variety of chemical reactions, such as thiol-ene click chemistry, Michael addition, or crosslinking with polymers and metal surfaces. This reactivity makes it compatible with a broad range of materials, including epoxy, acrylic, and rubber systems, where it can serve as a crosslinking agent or surface modifier.
Polymer Modification: Enhances crosslinking density and heat resistance of polyolefins or epoxy resins via thiol-ene click reactions.
Surface Modification: Acts as a coupling agent to improve interfacial bonding between fillers (e.g., silica) and polymer matrices, suitable for rubber and composites.
Functional Coatings: Used to prepare antioxidant or antibacterial coatings, improving material durability.
Note: This document does not contain the product safety information necessary for safe use. Prior to handling, please review the product and material safety data sheets along with hazard information. To obtain material safety data information, reach out to SIAP.
Keep away from fire and direct sunlight.
Store in a cool, dry, and well-ventilated area, away from direct sunlight and high temperatures.
It has 12 months shelf life in closed containers.
Recommended storage temperature: 5°C - 25°C.
Avoid prolonged contact with strong oxidizers, acidic substances, or air (to prevent thiol oxidation).
Products beyond the shelf life can be usable, if quality check passed.
Standard Packaging: 100 g/bottle, 500 g/bottle, 1 kg/bottle, 25 kg/drum.
Packaged in light-proof sealed containers; custom packaging available upon request.
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