Common Diffusion Pump Fluids

Trade Name	Chemical Name	MW (Avg.)	Pv @ 25C (Pa)	Viscosity @ 25C (mm2/s)	Boiling Point (C)
Convoil® 20	Hydrocarbon	400	5x10-5	80	190
OctoilS®	Bis (2ethylhexyl) sebacate	427	3x10-6	18.2	141
Invoil®	Dioctylphthalate	390	3x10-5	51	180
Dow Corning® 704	Tetraphenyltetra methyl trisiloxane	484	3x10-6	38	220
Dow Corning® 705	Pentaphenyltri methyl trisiloxane	546	4x10-8	175	250
Santovac 5®	Mixed 5Ring polyphenylether	447	6x10-8	2400	275
Fomblin® Y VAC 25/9	Perfluoropolyether	3400	9x10-7	190	180