Silicon(CAS 7440-21-3)
| Purity | Grade | Package | Stock | Price | Quantity |
| 99.9% metals basis,100-200nm | Extra Pure | 250MG | In Stock | 3 USD
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| 99.9% metals basis,100-200nm | Extra Pure | 1G | In Stock | 4 USD
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| 99.9% metals basis,100-200nm | Extra Pure | 5G | In Stock | 11 USD
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| 99.9% metals basis,100-200nm | Extra Pure | 25G | In Stock | 42 USD
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| 99.9% metals basis,100-200nm | Extra Pure | 100G | In Stock | 159 USD
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| 99.9% metals basis,1μm | Extra Pure | 1G | In Stock | 4 USD
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| 99.9% metals basis,1μm | Extra Pure | 5G | In Stock | 4 USD
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| 99.9% metals basis,1μm | Extra Pure | 25G | In Stock | 13 USD
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| 99.9% metals basis,1μm | Extra Pure | 100G | In Stock | 40 USD
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| 99.9% metals basis,1μm | Extra Pure | 500G | In Stock | 180 USD
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| 99.9% metals basis,20-60nm | Extra Pure | 1G | In Stock | 9 USD
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| 99.9% metals basis,20-60nm | Extra Pure | 5G | In Stock | 38 USD
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| 99.9% metals basis,20-60nm | Extra Pure | 25G | In Stock | 134 USD
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| 99.9% metals basis,20-60nm | Extra Pure | 100G | In Stock | 469 USD
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| 99.9% metals basis,200-800nm | Extra Pure | 25G | In Stock | 27 USD
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| 99.9% metals basis,200-800nm | Extra Pure | 100G | In Stock | 90 USD
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| 99.9% metals basis,200-800nm | Extra Pure | 500G | In Stock | 430 USD
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| 99.9% metals basis,200-800nm | Extra Pure | 2.5KG | In Stock | 1954 USD
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| 99.9% metals basis,60-100nm | Extra Pure | 1G | In Stock | 7 USD
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| 99.9% metals basis,60-100nm | Extra Pure | 5G | In Stock | 19 USD
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| 99.9% metals basis,60-100nm | Extra Pure | 25G | In Stock | 91 USD
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| 99.9% metals basis,60-100nm | Extra Pure | 100G | In Stock | 347 USD
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| 99.9% metals basis,60-100nm | Extra Pure | 500G | In Stock | 1664 USD
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| 99.9%,1-3μm | Extra Pure | 5G | In Stock | 7 USD
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| 99.9%,1-3μm | Extra Pure | 25G | In Stock | 20 USD
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| 99.9%,1-3μm | Extra Pure | 100G | In Stock | 62 USD
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| 99.9%,1-3μm | Extra Pure | 500G | In Stock | 299 USD
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| 99.9%,1-3μm | Extra Pure | 2.5KG | In Stock | 1435 USD
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| 99.9%,400 mesh | Extra Pure | 25G | In Stock | 5 USD
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| 99.9%,400 mesh | Extra Pure | 100G | In Stock | 12 USD
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| 99.9%,400 mesh | Extra Pure | 500G | In Stock | 43 USD
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| 99.9%,400 mesh | Extra Pure | 2.5KG | In Stock | 190 USD
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| 99.9%,400 mesh | Extra Pure | 10KG | In Stock | 722 USD
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| 99.99% metals basis,1-3mm | Extra Pure | 25G | In Stock | 9 USD
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| 99.99% metals basis,1-3mm | Extra Pure | 100G | In Stock | 24 USD
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| 99.99% metals basis,1-3mm | Extra Pure | 500G | In Stock | 77 USD
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| 99.99% metals basis,1-3mm | Extra Pure | 2.5KG | In Stock | 368 USD
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| 99.99% metals basis,1-3mm | Extra Pure | 10KG | In Stock | 1399 USD
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| 99.99% metals basis,40-200mesh | Extra Pure | 5G | In Stock | 5 USD
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| 99.99% metals basis,40-200mesh | Extra Pure | 25G | In Stock | 7 USD
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| 99.99% metals basis,40-200mesh | Extra Pure | 100G | In Stock | 15 USD
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| 99.99% metals basis,40-200mesh | Extra Pure | 500G | In Stock | 62 USD
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| 99.99% metals basis,40-200mesh | Extra Pure | 2.5KG | In Stock | 297 USD
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| 99.99% metals basis,40-200mesh | Extra Pure | 10KG | In Stock | 1129 USD
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| 99.99%,300mesh | Extra Pure | 5G | In Stock | 3 USD
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| 99.99%,300mesh | Extra Pure | 25G | In Stock | 6 USD
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| 99.99%,300mesh | Extra Pure | 100G | In Stock | 15 USD
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| 99.99%,300mesh | Extra Pure | 500G | In Stock | 53 USD
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| 99.99%,300mesh | Extra Pure | 2.5KG | In Stock | 249 USD
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| 99.99%,300mesh | Extra Pure | 25KG | In Stock | 2388 USD
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| Crystalline, -100 mesh, 99.9% (metals basis) | Extra Pure | 25G | In Stock | 38 USD
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| Crystalline, -100 mesh, 99.9% (metals basis) | Extra Pure | 100G | In Stock | 113 USD
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Available NMR Spectrum
Verified In Stock
Fast Shipping ISO 9001
Quality System
Applications of 7440-21-3
Silicon has diverse applications across various industries:
- Semiconductors: Silicon is the backbone of modern electronics, used extensively in transistors, diodes, and integrated circuits due to its favorable electrical properties.
- Solar Cells: Photovoltaic cells often utilize crystalline silicon for converting solar energy into electricity, making it a key material in renewable energy technologies.
- Construction Materials: Silica is a major component of concrete and glass production, while silicon compounds are used in ceramics and abrasives.
- Silicones: These synthetic polymers derived from silicon have applications ranging from lubricants and sealants to medical devices due to their thermal stability and chemical resistance.
Physical and chemical properties of 7440-21-3
Boiling Point |
4271 °F |
|---|---|
Density |
(77 °F): 2.33 |
Exact Mass |
27.98000 |
Exposure Limits |
ACGIH: TWA 2.5 mg/m3 NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3 |
Melting Point |
2570 °F |
Merck |
13,8565 |
Molecular Formula |
Si |
Molecular Weight |
28.09000 |
Odor |
Odorless |
pH |
13.5 (H2O, 20°C) |
Sensitivity |
Air Sensitive |
Solubility |
Insoluble |
Stability |
Stable. Fine powder is highly flammable. Incompatible with oxidizing agents, bases, carbonates, alkali metals, lead and aluminium oxides, halogens, carbides, formic acid. |
Storage condition |
Flammables area |
Vapour Pressure |
0 mmHg (approx) |
Water Solubility |
INSOLUBLE |
Retrosynthesis analysis of 7440-21-3
Q&A for CAS 7440-21-3
1. How can I verify product quality?
Every batch of our Chemical Reagents is tested to meet ISO 9001 standards. We provide COA & NMR & SDS Provided with each shipment. Batch COA available for verification, and third-party retesting is supported. A full refund is offered if our data is incorrect.
2. What is the delivery time?
Orders from Ready stock / In stock items typically Ships Tomorrow via Fast Shipping via FedEx/DHL/UPS. International deliveries usually arrive within 7 business days, subject to customs clearance.
3. What if the received product doesn’t meet quality standards?
If your Lab Grade Chemical Reagents do not match the Batch COA available, we will issue a replacement or a full refund upon verification.
4. Are hazardous labels included? How is safe shipping ensured?
Hazardous products are labeled and packaged following international regulations. We provide SDS Provided with all hazardous shipments to ensure safe and compliant transport.
5. Do you offer technical support?
Yes. Our Lab Supplier team is available to assist with questions about product usage, storage, Lab Grade requirements, applications, and more.
6. Are volume discounts available?
Yes. For bulk orders of Chemical Reagents, we offer competitive pricing. Submit a quotation request and we’ll provide a tailored offer.
7. Do you provide samples?
Yes, samples are available for selected Lab Grade products. Please submit a request to confirm availability and specifications.
8. Do you have products in stock?
Yes. Items labeled In stock / Ready stock on our website are available for immediate shipment, usually within 1–2 business days. Large packs or custom specifications require lead time confirmation.
9. Can you customize purity or packaging?
Yes. We support customization of Lab Grade purity, packaging size, and special testing requirements. Share your needs and we’ll provide a tailored solution.
10. Is the COA consistent with the shipped batch?
Yes. Batch COA available matches the actual shipment. COAs shown online are for reference or from previous batches.
11. Do you support long-term supply agreements?
Yes. We offer Lab Supplier services for stable batch consistency, pricing agreements, and safety stock for long-term customers to ensure uninterrupted supply.
12. What payment methods do you accept?
We accept Pay Local Currency via bank transfer (T/T), PayPal, and other methods. Credit terms are available for qualified long-term partners.
Download SDS of 7440-21-3
Pictograms |
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|---|---|
Signal Word |
Danger |
Hazard Statements |
H228 Flammable solid H320 Causes eye irritation |
Safety Data Sheet |
Download COA of 7440-21-3
Operate under the ISO 9001 system
