D4540 is listed as suitable for cryopreservation.
However, D2650 is already pre-sterile and has documentation with a protocol for cryopreservation of human and animal cell lines.
See these links:
https://www.sigmaaldrich.com/product/sigma/d2650
https://www.sigmaaldrich.com/product/sigma/d2650#product-documentation
Look for the Product Information Sheet. Also, see this link for more information:
https://www.sigmaaldrich.com/products/cell-culture-and-analysis/cell-culture-supplements-and-reagents/cell-freezing-reagents