Gold Colloid
BBI's unique recipe gold colloid has been used for over 20 years due to its superior quality and performance, and features in over 400 million tests in the global market place per year. Many of these have FDA cleared status.
Gold particles offer excellent stability and sensitivity characteristics, and as the market has grown to expect higher levels of sensitivity, gold has increasingly become regarded as an extremely reliable raw material in providing an accurate visual signal.
Creating Superior Quality Colloidal Gold
Gold colloid is an ideal reagent in the development and manufacture of assays because different particle sizes can be used for different applications. It is essentially inert and, when manufactured by BBInternational, forms uniform spherical particles at any size.
Stringent processes ensure that gold reagents are high quality, regardless of the particle size. This flexibility coupled with the excellent binding properties of gold to proteins makes gold the preferred label in the majority of rapid tests, whether wet or dry.
BBInternational colloidal gold is available in a wide range of pre-determined sizes and is supplied ready for conjugation in a range of concentrations (measured in optical density units of 520nm (OD). BBInternational’s gold colloid has a shelf life of 12 months when stored unopened at 4°C.
The Key Benefits to BBI's Colloidal Gold – a market leading product
- Stability and Sensitivity
- Low Coefficient of Variation (<8%)
- Uniform shape and size
- Roundness (> 95 % spherical, <5% uneven shapes)
Gold Colloid Sizes Available from BBInternational
BBI manufactures gold colloid in the following range of sizes, ensuring we can cater to our customers' needs whatever the application:
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2nm
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15nm
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40nm
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80nm
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200nm
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5nm
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20nm
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50nm
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100nm
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250nm
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10nm
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30nm
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60nm
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150nm
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Gold Colloid Volumes Available from BBInternational
BBI can provide bulk Gold Colloid from 100ml up to 350 litres from one single batch, ensuring product consistency.
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For research volumes under 100ml visit our ecommerce website to buy online
Starter Pack
If you are unsure of which particle size you require, why not try our starter pack which offers 100ml each 
of 20nm, 40nm, 60nm and 80nm Gold Colloid. Email our Account Manager Paul Williams to place your order.
For further information about our colloidal gold or for bulk pricing please contact us at: T: +44 (0) 2920.747 232 or email us directly