Polyethylene Glycol (PEG) 4000 (ATCC® 52-X™) General Information Quality Control Specifications Documentation Print Email Share Share this product Facebook Twitter Google+ Product Format freeze-dried 5 x 2 gram vials Storage Conditions At the ATCC, PEG-4000 is stored at 2°C to 8°C, but the reagent may be stored at room temperature. Applications PEG-4000 is used to assist in the fusion of myeloma and spleen cells to form hybridomas. Biosafety Level 1 Quality Control Specifications Each lot is tested for bacterial and fungal contamination. Cytotoxicity testing is performed on NS-1 cells at a 40% w/v concentration. Cells must remain greater than 80% viable after exposure to PEG. Basic Documentation Product Sheet Certificate of Analysis MSDS