This product is not sterile. Prepared solutions would need to be filter-sterilized. Please see the link below to review a sterile Estradiol product option:
https://www.sigmaaldrich.com/product/sigma/e2257
Currently, a sterile testosterone product is not available. Testosterone product T1500, while not sterile or tested for use in cell culture, has been used successfully by other researchers in culture applications. Please see the link below to review an example publication:
https://www.sciencedirect.com/science/article/pii/S0090955624033695?via%3Dihub
Please see the link below to review this testosterone product option:
https://www.sigmaaldrich.com/product/sigma/t1500


