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Premium Quality Dextran Derivatives

Using TdB’s premium products with narrow fractions (low PD) will give you reliable and reproducible results.

Looking for an expert on Dextran Derivatives? We produce, analyse and develop custom products for your project.

About us

TdB Consultancy AB is a Swedish biotech company specialized in the development and manufacturing of dextran derivatives. In addition, we have expertise in most aspects of polysaccharide chemistry. This includes not only synthesis but also chemical and physical characterization; our latest addition is a GPC system equipped with light-scattering, viscosity and refractive index detection.

We specialize particularly in the synthesis of fluorescent derivatives of polysaccharides. We offer derivatives labelled with FITC, TRITC, ATTO™-dyes and our proprietary Antonia Red™-dye. Our portfolio consists of more than 30 product groups, of which 20 are fluorescent.

For a presentation of intravital studies using fluorescent dextrans pdfclick here.


All products from TdB Consultancy are of premium quality. Our polysaccharide derivatives have a low polydispersity (PD) and high purity. This is especially important for permeability studies; a low PD gives much more reliable and reproducible result. Using TdB Consultancy products will help our customers achieve their research goals.

All our standard products are of technical grade. Please contact us  if you are interested in products of higher purity. Possible applications of high purity products are for example as part of medical devices. You can read more about our custom specific products here.


Our products are employed widely in Life Sciences ranging from permeability studies, cell preservation, animal studies to applications in processing of clinical products. Dextrans are also used in diagnostic kits and as molecular markers.

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Upcoming: TdB Consultancy at CphI Worldwide

TdB Consultancy are going to the world’s largest pharmaceutical exhibition CPhI Worldwide 2019, 5-7 November in Frankfurt!

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2019-10-28: Have you ever considered the health effects of palm oil?

A new study published in BBA Molecular and Cell Biology of Lipids shows that intake of palm oil induces intestinal inflammation.
Read more

2019-10-24: A new article published in EBiomedicin are showing the effect faecal microbiota transplantation.

A new study are showing how a single faecal microbiota transplantation affects the microbiome and clinical outcome in rat models of colitis.
Read more

2019-10-22: Learn more about the diverse applications of dextran sulfate

Dextran sulfate has a very wide application area within life science. It has been used as an anti-coagulant in cell media, to inhibit viral effects, to precipitate lipoproteins and more
Read more

Dextran Handbook

Dextran Handbook: Introduction to Dextran
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High quality analysis of your substance

We can now offer a series of analyses specific to charged and uncharged dextran and Polysucrose derivatives. This includes molecular weight determination using GPC (gel permeation chromatography), determinations of degrees of substitution for dextran sulfates.

Read more here

Let us develop and produce your customized product

An important part of our services comprises the development and production of customised products. This entails not only chemical synthesis but also Quality Control aspects; Specifications, Analytical methods, SDS, biological assays and stability.

Read more here
FITC-dextran 70 (FD70)

FITC-dextran 70 (FD70)

The product is a yellow powder which is readily soluble in water. The mean molecular weight is 63000 -77000 as measured by SEC. The degree of substitution is between 0.003 -0.008.

660 SEK
Fact Value
Catalog no. FD70
Availability In stock
Mol.wt 63000-77000
Emission 520 nm
Absorbance 493 nm