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80462 Sigma-Aldrich

Micro particles based on melamine resin, rhodamine B-marked

size: 4 μm

Synonym: Melamine-formaldehyde resin

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Properties

Related Categories Biochemicals and Reagents, Fluorescent Microparticles, Micro particles based on melamine resin, rhodamine B labeled, Microparticles
form   aqueous suspension
concentration   2.5% (solids)
particle size   4 μm std dev <0.15 μm, coeff var <5%
fluorescence   λex 540 nm; λem 584

Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Analysis Note

For every lot, exact values of particle size and standard deviation are determined with an accuracy of 0.01 μm using a Coulter Multisizer.

Price and Availability

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3

Documents

Certificate of Analysis

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
Can products be covalently attached through binding to the Rhodamine dye on the bead for the Micro particles based on melamine resin, rhodamine B marked?
For Mico Particles based on Melamine Resin, Rhodamine B-marked, fluorescent, the fluorophores are not coated on the particles’ surfaces but are incorporated throughout their interiors. Plus, the amount of applied dye is below 0.2 wt.-%, or so. Hence, the approach of coupling anything via dye-borne functional groups is not very promising. Nitrogen centers of the polymer itself are not accessible for covalent bonds either. For coupling reactions whatsoever, it is recommended to use the micro Particles with functional groups such as 83088 and 88893, Micro particles based on melamine resin, carboxylate modified, rhodamine B-marked.
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Protocols & Articles

Articles

Fluorescent Microparticles and Nanobeads

Microparticles have been found to have widespread applications in medicine, biochemistry, colloid chemistry, and aerosol research. Uses include chromatographic separation media, supports for immobili...
BioFiles 2007, 2.5, 25.
Keywords: Agglutination, Biochemistry, Catalysis, Derivatizations, Electronics, Environmental, Flow cytometry, Immobilization, Ligands, Microscopy, Nanotechnology, Separation, Solvents

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