Gold(CAS 7440-57-5)
| Purity | Grade | Package | Stock | Price | Quantity |
| 99.99%,powder | Extra Pure | 100MG | In Stock | 46 USD
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| 99.99%,powder | Extra Pure | 250MG | In Stock | 97 USD
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| 99.99%,powder | Extra Pure | 1G | In Stock | 383 USD
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| 99.99%,powder | Extra Pure | 5G | In Stock | 1902 USD
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Applications of 7440-57-5
| Industry | Application | Process |
|---|---|---|
| Electronics Industry | Electrical contact materials, connectors, lead frames, semiconductor bonding wires | Fabricated into high-reliability electronic components via melting, wire drawing, electroplating, or sputtering—leveraging gold’s high electrical conductivity, corrosion resistance, and low contact resistance. |
| Electronics Industry | Surface finish for printed circuit boards (PCBs) | Electroless nickel immersion gold (ENIG) or electroplated gold processes applied to copper foil surfaces to prevent oxidation and ensure solderability. |
| Jewelry & Watchmaking | Jewelry manufacturing (rings, necklaces, bracelets, etc.) | Processed via melting and casting, forging, mechanical machining, and polishing; commonly alloyed with silver, copper, or other metals (e.g., 18K gold) to enhance hardness. |
| Financial Investment | Currency, bullion bars, investment coins | Refined to ≥99.99% purity using electrolytic refining or the Wohlwill process, then cast into standardized investment-grade forms. |
| Aerospace | Thermal control coatings, radiation shielding barriers | Applied via physical vapor deposition (PVD) onto spacecraft surfaces—exploiting gold’s high infrared reflectivity to reject solar radiation. |
| Aerospace | Coatings for engine components | Applied to high-temperature component surfaces to inhibit high-temperature corrosion and carbon deposit adhesion. |
| Dental & Medical Devices | Dental restorative materials (crowns, bridges, inlays) | Fabricated into precision dental prostheses via casting—utilizing gold’s biocompatibility, corrosion resistance, and ductility; frequently alloyed with other metals. |
| Pharmaceuticals & Diagnostics | Rheumatoid arthritis therapeutics | Synthesis of gold salts (e.g., sodium aurothiomalate) as anti-inflammatory agents for treating active rheumatoid arthritis. |
| Pharmaceuticals & Diagnostics | Medical diagnostic reagents | Colloidal gold-based immunochromatography—using gold nanoparticles as tracer labels in rapid test strips for pregnancy detection, pathogen identification, and other point-of-care assays. |
| Catalysis | Catalyst for chemical reactions | Supported nanogold catalysts employed in low-temperature CO oxidation, propylene epoxidation, and related chemical transformations. |
| Architectural Glass | Glass coloring and solar heat control | Gold salts incorporated into glass batch compositions or applied via in-line thermal spraying—exploiting the coloration effect of colloidal gold to produce ruby-red or solar-control glass. |
| Instrumentation & Metrology | Components for precision measuring instruments | Used in infrared spectrometer mirrors, standard resistors, thermocouples, etc.—fabricated via precision machining or thin-film deposition, leveraging gold’s stable physical and chemical properties. |
Physical and chemical properties of 7440-57-5
Boiling Point |
2700 deg C |
|---|---|
Density |
19.3 |
Exact Mass |
196.966507 |
Exposure Limits |
NIOSH: IDLH 25 mg/m3 |
Flash Point |
4 °C |
Index of Refraction |
n20/589.3 1.523 |
Melting Point |
1064.76 deg C |
Merck |
13,4529 |
Molecular Formula |
Au |
Molecular Weight |
196.967 |
Odor |
No odor |
pH |
6-8 |
pH Range |
6 - 8 |
resistivity |
2.05 μΩ-cm, 0°C |
Sensitivity |
Light Sensitive |
Stability |
Stable. May react with halogens, strong oxidizing agents, ammonia, hydrogen peroxide. Reaction with ammonia or hydrogen peroxide may form explosive materials. |
Storage condition |
2-8°C |
Vapour Pressure |
VP: 1 Pa @ 1373 °C; 10 Pa @ 1541 °C; 100 Pa at 1748 °C; 1 kPa @ 2008 °C; 10 kPa @ 2347 °C; 100 kPa @ 2805 °C |
Water Solubility |
H2O: soluble |
Retrosynthesis analysis of 7440-57-5
Cas:37131-30-9
Cas:14951-50-9
Cas:39929-21-0
Q&A for CAS 7440-57-5
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 COA of 7440-57-5
Operate under the ISO 9001 system
