Radiopaque marker bands are commonly utilized in the medical device industry, particularly in minimally invasive surgeries. These marker bands are typically constructed from high-density metals such as platinum (Pt), platinum/iridium (Pt/Ir), gold, and tantalum.
Gold (Au) has been widely used as a precious metal for centuries, serving various purposes such as currency, hedging, and jewelry. In its natural state, gold appears as elemental blocks or particles in rocks, underground veins, and alluvial layers. Gold is also recognized as one of the monetary metals.
Gold possesses inert chemical properties, making it a stable and unreactive metallic element. It does not readily react with oxygen under normal temperature or heating conditions. Gold oxide can only be produced through special processes and can be dissolved in highly corrosive (oxidizing) substances like aqua regia, selenic acid, perchloric acid, or a mixture of hydrofluoric acid and nitric acid.
At room temperature, gold is solid and exhibits high density, softness, brightness, and corrosion resistance. It is also the most ductile metal, second only to platinum in terms of ductility, and is known for its exceptional malleability.
In the medical industry, gold can be used as a marker band for catheters. Marker bands serve as X-ray development markers in the distal working area of interventional therapy, and are considered disposable medical materials. We offer gold marker bands, as well as marker bands made from Pt/Ir, Pt, and tantalum, with strict dimension tolerances and high quality standards. Please feel free to contact us for more information.
Size Available:
Outer diameter range: 0.0075” – 0.492”
Typical tolerance of the outer diameter: +/-0.008”
Wall thickness range: 0.0006” to 0.02”
Typical tolerance of the wall thickness: +/-0.0004”
Length: 0.04” or custom made
Typical tolerance of the length: +/- 0.004”
Cutting service and custom work are available.
Typical Application:
Radiopaque marker bands, which can be used as a part of medical devices.
Order Information
Please include the following information with your inquires and orders:
- Material: gold, tantalum, platinum, Pt/Ir
- Quantity
- Drawings (dimensions/tolerances)
Chemical Composition for Grade 99.99% Purity (%):
| Gold (Au), min. | 99.99 |
| Silver (Ag), max. | 0.009 |
| Copper (Cu), max. | 0.005 |
| Palladium (Pd), max. | 0.005 |
| Iron (Fe), max. | 0.002 |
| Lead (Pb), max. | 0.002 |
| Silicon (Si), max. | 0.005 |
| Magnesium (Mg), max. | 0.003 |
| Arsenic (As), max. | 0.003 |
| Bismuth (Bi), max. | 0.002 |
| Tin (Sn), max. | 0.001 |
| Chromium (Cr), max. | 0.0003 |
| Nickel (Ni), max. | 0.0003 |
| Manganese (Mn), max. | 0.0003 |
Grade 99.99, chemical compositions conform to: ASTM B562.
Standard Packing
Standard Packing: Wrapped in a plastic bag and loaded in a plastic box.
Physical Properties of Gold (Au)
| Phase: | Solid |
| Melting Point: | 1064°C |
| Boiling Point: | 2530-2947°C |
| Density: | 19.32 g/cm3 |
| Molecular Weight | 196.67 |
| CAS# | 7440-57-5 |
| EINECS | 231-165-9 |
| Specific Heat Capacity | 0.13 kJ/(kg·K) |
Related Products
Tantalum Marker Band
Platinum Iridium Marker Band
Platinum Iridium Microelectrode
Precious Metal Micro Machined Part
