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Technical Support

Delivering exceptional technical support

The following links contain answers to the most common questions that technical support are asked - click on any link for further information.

If you don't find the answer you are looking for, please complete a technical enquiry form or contact us directly for further information and assistance. Our friendly and professional scientific experts will gladly assist you.

Purity

The purity quoted in the catalog entry for each product is the minimum content of the active ingredient that any given batch will contain. For definitive analytical data on any product there are three authoritative sources: the batch specific datasheet provided with the product, the product vial label, and the batch specific Certificate of Analysis (CoA) which can be accessed using the 'view current batch' or 'specific/earlier batch' facility on individual product pages of the website.

Minor batch to batch variation, which has no effect on the overall biological properties of the material, may take place due to manufacture whereby small and unpredictable changes in the degree of hydration of the product, or a change in the nature of the salt counter ion often occur. Consequently solutions should only be made up using batch specific information derived from the three authoritative sources detailed above.

Bioactive chemical purity

Tocris bioactive chemicals are of high purity, typically > 99% by HPLC. For purity of an individual product please consult the Certificate of Analysis (COA).

Peptide purity

Unless otherwise stated, peptides supplied by Tocris have a purity of > 95%. For purity of an individual product please consult the Certificate of Analysis (COA).

Product sterility

Tocris products are not weighed out under sterile conditions, and should not be treated as such. If required, sterile solutions can be prepared by subsequent filtration.

Quality control

Chemical purity is assessed using an array of techniques including HPLC, chiral HPLC, NMR, microanalysis, high voltage electrophoresis, melting point, optical rotation, TLC, and mass spectrometry as appropriate. All data is kept on file and available for inspection on request - please contact Technical Support for details. In all cases we believe that the purity of any material supplied by Tocris will match or exceed the purity of the product originally reported in the scientific literature.

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