name		Structural formula	CAS NO.
ethylene glycol			107-21-1
Methanol			67-56-1
Benzene			71-43-2
Toluene			108-88-3
Xylene			1330-20-7
1-Butanol			71-36-3
2-Methyl-1-propanol			78-83-1
Diethylene glycol			111-46-6
Pure terephthalic acid£¨PTA£©			100-21-0
			75-09-2
			67-66-3
			108-24-7
			75-01-4