The cas register number of Fluorescent Brightener 351 is 38775-22-3. It also can be called as 4-4'-Bis(2-sulfostyryl)biphenyl and the Systematic name about this chemical is 2-[2-[4-[4-[2-(2-sulfophenyl)ethenyl]phenyl]phenyl]ethenyl]benzenesulfonic acid.

Physical properties about Fluorescent Brightener 351 are: (1)ACD/LogP: 5.71; (2)# of Rule of 5 Violations: 2; (3)ACD/LogD (pH 5.5): 1.21; (4)ACD/LogD (pH 7.4): 1.21; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 6; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 7; (12)Polar Surface Area: 103.5 Å²; (13)Index of Refraction: 1.688; (14)Molar Refractivity: 139.91 cm³; (15)Molar Volume: 366.6 cm³; (16)Surface Tension: 66.4 dyne/cm; (17)Density: 1.414 g/cm³.

People can use the following data to convert to the molecule structure.
1.SMILES: O=S(=O)(O)c1ccccc1C=Cc2ccc(cc2)c4ccc(C=Cc3ccccc3S(=O)(=O)O)cc4
2.InChI: InChI=1/C28H22O6S2/c29-35(30,31)27-7-3-1-5-25(27)19-13-21-9-15-23(16-10-21)24-17-11-22(12-18-24)14-20-26-6-2-4-8-28(26)36(32,33)34/h1-20H,(H,29,30,31)(H,32,33,34) 
3.InChIKey: SQAKQVFOMMLRPR-UHFFFAOYAJ
4.Std. InChI: InChI=1S/C28H22O6S2/c29-35(30,31)27-7-3-1-5-25(27)19-13-21-9-15-23(16-10-21)24-17-11-22(12-18-24)14-20-26-6-2-4-8-28(26)36(32,33)34/h1-20H,(H,29,30,31)(H,32,33,34).