Germanium(CAS 7440-56-4)
| Purity | Grade | Package | Stock | Price | Quantity |
| 99.99%,40mesh,powder | Extra Pure | 5G | In Stock | 22 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 | 146 USD
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| 99.999%,1-3mm,grain | Ultra Pure | 100G | In Stock | 512 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 | 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
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] |
Download COA of 7440-56-4
Download SDS of 7440-56-4
Pictograms |
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|---|---|
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 |
Q&A for CAS 7440-56-4
1. How can I verify product quality?
Every batch is tested in accordance with ISO 9001 requirements. We provide a Certificate of Analysis (COA), NMR spectrum, purity report, and test methods with each shipment. Third-party retesting is supported, and we offer a full refund if our data is incorrect.
2. What is the delivery time?
Orders are shipped on the second business day via FedEx, DHL, or UPS. International deliveries typically arrive within 7 business days (subject to customs clearance).
3. What if the received product doesn’t meet quality standards?
If the product does not match the COA or has a quality issue, we will issue a full refund or replacement upon verification.
4. Are hazardous labels included? How is safe shipping ensured?
Hazardous products are labeled and packaged in compliance with international regulations and shipped with an up-to-date Safety Data Sheet (SDS) to ensure safe and compliant transport.
5. Do you offer technical support?
Yes. Our technical team is available to assist with questions about product use, storage, purity requirements, applications, and more.
6. Are volume discounts available?
Yes. We offer competitive pricing for bulk orders. Please submit a quotation request, and we’ll provide a customized offer.
7. Do you provide samples?
Yes, samples are available for select products for testing and validation. Please submit a sample request or contact our sales team to confirm availability and specifications.
8. Do you have products in stock?
Items marked “In Stock” on our website are ready 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 purity, packaging size, and special testing requirements. Please share your detailed needs, and we’ll provide a solution.
10. Is the COA consistent with the shipped batch?
Yes. The COA provided with your shipment matches the actual batch and includes the batch number. COAs shown online are for reference or from previous batches.
11. Do you support long-term supply agreements?
Yes. We offer stable batch consistency, pricing agreements, and safety stock options for long-term customers to ensure uninterrupted supply.
12. What payment methods do you accept?
We accept bank transfer (T/T), PayPal, and other methods. Credit terms may be available for qualified long-term partners.
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
Retrosynthesis analysis of 7440-56-4
Operate under the ISO 9001 system


