Por rfc4180 , você deve usar aspas duplas para delimitar o campo.
Fields containing line breaks (CRLF), double quotes, and commas should be enclosed in double-quotes. For example:
"aaa","b CRLF
bb","ccc" CRLF
zzz,yyy,xxx
"New York City, USA","next field value","Field, With, Lots, Of, Commas"