Germanium(CAS 7440-56-4)
| Purity | Grade | Package | Stock | Price | Quantity |
| 99.99%,40mesh,powder | Extra Pure | 1G | In Stock | 8 USD
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| 99.99%,40mesh,powder | Extra Pure | 5G | In Stock | 22 USD
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| 99.99%,40mesh,powder | Extra Pure | 25G | In Stock | 148 USD
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| 99.99%,40mesh,powder | Extra Pure | 100G | In Stock | 528 USD
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| 99.99%,40mesh,powder | Extra Pure | 500G | In Stock | 2535 USD
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| 99.99%,powder | Extra Pure | 1G | In Stock | 7 USD
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| 99.99%,powder | Extra Pure | 5G | In Stock | 33 USD
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| 99.99%,powder | Extra Pure | 25G | In Stock | 140 USD
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| 99.99%,powder | Extra Pure | 100G | In Stock | 534 USD
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| 99.99%,powder | Extra Pure | 500G | In Stock | 2563 USD
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| 99.999%,1-3mm,grain | Ultra Pure | 1G | In Stock | 8 USD
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| 99.999%,1-3mm,grain | Ultra Pure | 5G | In Stock | 35 USD
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| 99.999%,1-3mm,grain | Ultra Pure | 25G | In Stock | 164 USD
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| 99.999%,1-3mm,grain | Ultra Pure | 100G | In Stock | 635 USD
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| 99.999%,1-3mm,grain | Ultra Pure | 500G | In Stock | 3106 USD
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| 99.999%,100mesh,powder | Ultra Pure | 250MG | In Stock | 6 USD
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| 99.999%,100mesh,powder | Ultra Pure | 1G | In Stock | 20 USD
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| 99.999%,100mesh,powder | Ultra Pure | 5G | In Stock | 77 USD
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| 99.999%,100mesh,powder | Ultra Pure | 25G | In Stock | 345 USD
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| 99.999%,100mesh,powder | Ultra Pure | 100G | In Stock | 1208 USD
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| 99.999%,200mesh | Ultra Pure | 1G | In Stock | 8 USD
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| 99.999%,200mesh | Ultra Pure | 5G | In Stock | 39 USD
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| 99.999%,200mesh | Ultra Pure | 25G | In Stock | 108 USD
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| 99.999%,200mesh | Ultra Pure | 100G | In Stock | 662 USD
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| 99.999%,200mesh | Ultra Pure | 500G | In Stock | 2935 USD
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| granular,99.99%,1-3mm | Extra Pure | 1G | In Stock | 8 USD
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| granular,99.99%,1-3mm | Extra Pure | 5G | In Stock | 31 USD
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| granular,99.99%,1-3mm | Extra Pure | 25G | In Stock | 144 USD
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| granular,99.99%,1-3mm | Extra Pure | 100G | In Stock | 560 USD
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| granular,99.99%,1-3mm | Extra Pure | 500G | In Stock | 2790 USD
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| granular,99.9999%,1-5mm | Ultra Pure | 1G | In Stock | 10 USD
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| granular,99.9999%,1-5mm | Ultra Pure | 5G | In Stock | 44 USD
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| granular,99.9999%,1-5mm | Ultra Pure | 25G | In Stock | 179 USD
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| granular,99.9999%,1-5mm | Ultra Pure | 100G | In Stock | 698 USD
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| granular,99.9999%,1-5mm | Ultra Pure | 500G | In Stock | 3421 USD
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Available NMR Spectrum
Verified In Stock
Fast Shipping ISO 9001
Quality System
Applications of 7440-56-4
Germanium has numerous applications across various fields:
- Electronics: It is widely used in semiconductor devices, including transistors and diodes.
- Optics: Due to its high refractive index and transparency to infrared light, germanium is used in fiber-optic systems and infrared optics.
- Catalysts: Germanium compounds serve as catalysts in the production of polymers and other chemical processes.
- Military
Physical and chemical properties of 7440-56-4
Boiling Point |
2700 °C |
|---|---|
Density |
INTRINSIC CHARGE DENSITY @ 300 DEG K= 2.4X10+13; ELECTRON DIFFUSION CONSTANT @ 300 DEG K= 100 |
Exact Mass |
73.921181 |
Exposure Limits |
ACGIH: TWA 0.5 ppm(2.5 mg/m3); Ceiling 2 ppm (Skin) OSHA: TWA 3 ppm NIOSH: IDLH 30 ppm(250 mg/m3); TWA 3 ppm(2.5 mg/m3); Ceiling 6 ppm(5 mg/m3) |
Index of Refraction |
IS HIGHLY TRANSPARENT TO INFRARED LIGHT; HAS A HIGH INDEX OF REFRACTION |
LogP |
0.06920 |
Melting Point |
Heat of fusion at melting point = 3.18X10+7 J/kmol. |
Merck |
13,4419 |
Molecular Formula |
Ge |
Molecular Weight |
72.640 |
resistivity |
53000 μΩ-cm, 20°C |
Stability |
Stable. Slightly soluble in strong acids. Incompatible with strong oxidizing agents. |
Storage condition |
Flammables area |
Vapour Pressure |
0 mm Hg @ 25 °C |
Water Solubility |
insoluble H2O, HCl, dilute alkali hydroxides; attacked by aqua regia [MER06] |
Retrosynthesis analysis of 7440-56-4
Q&A for CAS 7440-56-4
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 7440-56-4
Pictograms |
![]() ![]() |
|---|---|
Signal Word |
Danger |
Hazard Statements |
H228 Flammable solid H361 Suspected of damaging fertility or the unborn child H373 May causes damage to organs through prolonged or repeated exposure H412 Harmful to aquatic life with long lasting effects |
Safety Data Sheet |
Download COA of 7440-56-4
Operate under the ISO 9001 system

