Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
Product Overview
Cyclopentasilane (CAS 289-22-5, also known as CPS or Pentasilacyclopentane) is a cyclic silicon hydride compound. It is a colorless, volatile liquid with a pungent odor, highly reactive and moisture-sensitive. As a key precursor for semiconductor silicon deposition and organic silicon synthesis, it features high silicon content, low impurity and excellent film-forming ability. Widely used in electronic materials, photovoltaics, organic silicon intermediates and scientific research. For industrial synthesis, electronic manufacturing and research use only.
Product Features
- High Purity: ≥97% (GC), strict control of moisture and oxygen, meets electronic grade requirements.
- High Reactivity: Easily decomposes to deposit high-purity silicon films under mild conditions.
- Moisture-Sensitive: Reacts violently with water; must be stored and handled under inert gas.
- Factory Supply: Competitive price, sufficient stock, customized packaging, fast delivery.
- Strict QC: Full batch testing; COA, MSDS and HPLC spectra available upon request.
Physical & Chemical Properties
Physical Properties
- Appearance: Colorless volatile liquid
- Odor: Pungent characteristic odor
- Molecular Formula: H10Si5
- Molecular Weight: 150.51
- Boiling Point: 80 °C (20 mmHg)
- Density: ~0.95 g/mL (25 °C)
- Solubility: Reacts with water; soluble in organic solvents like hexane and toluene
- Vapor Pressure: High volatility at room temperature
- Storage Temperature: 2–8 °C (under nitrogen)
Chemical Properties
- Chemical Stability: Unstable in air; decomposes slowly at room temperature, releasing hydrogen.
- Reactivity: Highly reactive with water, oxygen, acids and bases; decomposes to form silicon and hydrogen.
- Incompatibility: Avoid contact with air, moisture, oxidants and strong reducing agents.
Applications
- Semiconductor Industry: Precursor for depositing amorphous silicon and polycrystalline silicon films in thin-film transistors (TFTs) and solar cells.
- Photovoltaic Materials: Key raw material for silicon-based photovoltaic cell manufacturing.
- Organic Silicon Synthesis: Intermediate for preparing high-purity silicon compounds and silicon-based polymers.
- Electronic Materials: Used in the production of electronic-grade silicon wafers and semiconductor components.
- Scientific Research: Common reagent for silicon chemistry and material science research.
Usage Restriction: For industrial manufacturing and scientific research only. Strictly forbidden for illegal use or non-industrial purposes.
Storage & Transportation Instructions
Storage Conditions
Store in a cool, dry, dark and well-ventilated warehouse. Keep containers tightly sealed under nitrogen atmosphere. Store at 2–8 °C; avoid freezing, strong light and heat sources. Store separately from oxidants, reducing agents, strong acids and strong bases. Reseal immediately after opening.
Transportation Requirements
Classified as hazardous goods (flammable, water-reactive). Use hermetically sealed, nitrogen-purged packaging (stainless steel cylinders, HDPE drums with inner lining). Avoid violent collision, extrusion, strong light and rain. Do not transport with food, feed or toxic substances. Follow IATA/IMDG provisions for international shipping.
Operation Notes
Wear airtight chemical goggles, chemical-resistant gloves and flame-resistant protective clothing. Operate in a glove box or fume hood under inert gas. Avoid inhalation of vapor and direct contact with skin and eyes. Rinse thoroughly with plenty of clean water in case of contact. No eating, drinking or smoking in work area.
Regulatory Information
- EINECS Number: Not available
- HS Code: 28500090
- Grade Standard: Electronic Grade / Research Grade
- Compliance: Meets GB/T and international electronic chemical standards; supported by complete documentation (COA, MSDS, HPLC).
- Transaction Scope: Limited to qualified semiconductor factories, photovoltaic enterprises and research institutions.
Full Product Parameter Table
| Item | Specification & Details |
| Product Name | Cyclopentasilane |
| CAS NO. | 289-22-5 |
| IUPAC Name | Pentasilacyclopentane |
| Synonyms | CPS; Pentasilolane; Si5H10 |
| Molecular Formula | H10Si5 |
| Molecular Weight | 150.51 |
| EINECS Number | Not available |
| UN Number | UN 2924 |
| Hazard Class | 3 (Flammable Liquid), 4.3 (Dangerous When Wet) |
| Appearance | Colorless volatile liquid |
| Purity | ≥97% (GC) |
| Water Content | ≤50 ppm |
| Boiling Point | 80 °C (20 mmHg) |
| Density | ~0.95 g/mL (25 °C) |
| Solubility | Reacts with water; soluble in hexane, toluene |
| Storage Temperature | 2–8 °C, sealed under nitrogen |
| Packing Specification | 10g/glass bottle, 100g/stainless steel cylinder, 500g/drum |
| Grade | Electronic Grade / Research Grade |
| Application | Semiconductor silicon deposition, photovoltaic materials, organic silicon synthesis |
| Validity Period | 6 Months under specified storage |
