Your question concerning the sale of R-413A has been referred to me for reply.
R-413A is DuPont's ISCEON(R) MO49. As originally formulated, ISCEON(R) MO49 is flammable. DuPont prefers not to sell flammable products. We reformulated ISCEON(R) MO49 and are selling it under the tradename of ISCEON(R) MO49 Plus. The ASHRAE number for ISCEON(R) MO49 Plus is R-437A. Here is some information on the product:
Additional information, including retrofit guidelines, is available on our website www.refrigerants.dupont.com
Thank you for contacting DuPont. If we can be of further assistance, please let us know.
Allison M. Whittington
Technical Service Consultant