1. http://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%AE%E0%B8%81%E0%B9%80%E0%B8%8B%E0%B8%99
2. http://www.chemtrack.org/News-Detail.asp?TID=1&ID=92
3. http://msds.pcd.go.th/searchName.asp?vID=589
4.