Do any Invitrogen competent cells contain DMSO in the freezing medium?
Yes, several of our competent cells products are frozen with DMSO. The presence of DMSO (dimethylsulfoxide) will generally be indicated in the MSDS files if you have a question about a particular product, but here is a list of commonly used products that are known to have DMSO in the freezing buffer:
One Shot OmniMAX 2 T1 Phage Resistant Cells, Cat. No. C8540-03
One Shot INV?F' Chemically Competent Cells, Cat. No. C2020-03 and C2020-06
One Shot MAX Efficiency DH5?-T1 Chemically Competent Cells, Cat. No. 12297-016
MAX Efficiency DH5?-T1 Phage Resistant Cells, Cat. No. 12034-013
MAX Efficiency DH5? Chemically Competent Cells, Cat. No. 18258-012
Library Efficiency DH5? Chemically Competent Cells, Cat. No. 18263-012
MAX Efficiency DH5? F'IQ Cells, Cat. No. 18288-019
MAX Efficiency Stbl2Chemically Competent Cells, Cat. No. 10268-019