Write a string containing commas and double quotes to CSV

I'm trying to produce a Google Shopping feed of 30,000+ items, outputting this product feed as a CSV.

The problem is that the product descriptions of these items contain variables amounts of commas, double quotes, single quotes and HTML. At first, it was just the commas causing me problems, so after a bit of research, I wrapped the strings I was outputting in double quotes:

  

 //This function isn't terribly important, but is referenced below        function sanitizeString (desc) {          var itemDesc;          if (desc) {              itemDesc = desc.replace(/(rn|n|r|s+|t| )/gm,' ');              itemDesc = itemDesc.replace(/,/g, ',');              itemDesc = itemDesc.replace(/"/g, '"');              itemDesc = itemDesc.replace(/'/g, ''');              itemDesc = itemDesc.replace(/ +(?= )/g,'');              if (itemDesc.length > 5000) {                  itemDesc = itemDesc.substring(0,5000)                  itemDesc = itemDesc.substring(0, itemDesc.lastIndexOf('.'));              } else {                  itemDesc = itemDesc;              }          } else {              itemDesc = '';          }          return itemDesc;      }        //below is a snippet from a for loop. val is a JSON object. col is an index string. row is then appended to the file using appendLine();        row += '"' +