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• ​Sperm preparation media - stock solution

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• Sil-Select Stock™ is our home made stock solution for preparing density gradient system for semen preparation. Sil-Select Stock™ is an isotonic solution of silane-coated sicila particles in a chemically defined, balanced salts solution with HEPES (pH buffer). Extensive testing during the design of the product has shown it to be non-cytotoxic and non-irritant with a non-significant allergenic potential. 

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• Sil-Select Stock™ is manufactured from raw colloidal silica, so we have full control over each step in the production process. We have developed a very accurate purification system which results in a very clean product with endotoxin levels below 0.25EU/ml. 

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• Sil-Select Stock™ is CE marked as a medical device according to the Medical Device Directive 93/42/EEC.