X0202 4 2006-09-08 0 0001007800 SIPEX CORP SIPX 0001375412 Guilbault Pierre G C/O SIPEX CORPORATION 233 S. HILLVIEW DRIVE MIPITAS CA 95035 1 0 0 0 Stock Option (right to buy) 3.45 2006-09-08 4 A 0 25000 A 2016-09-08 Common Stock 25000 25000 D Stock Option (right to buy) 3.45 2006-09-08 4 A 0 10000 A 2016-09-08 Common Stock 10000 10000 D The option vests according to the following schedule: 1/4 of the shares subject to the option shall vest on the 8th of September 2007 and on the 8th of September for each of the next 3 years thereafter The option vests according to the following schedule: 1/4 of the shares subject to the option shall vest on each of December 8, 2006; March 8, 2007; June 8, 2007; and September 8, 2007 N/A /s/ Pierre Guilbault, by Clyde R Wallin atty-in-fact 2006-09-13