Fluorescent Brightener 357

• CAT Number: M015003
• CAS Number: 41098-56-0
• Molecular Formula: C40H38N12Na6O18S6
• Molecular Weight: 1305.11
• Purity: ≥95%
• Synonyms: Kaycoll PK;hexasodium 2,2/’-[vinylenebis[(3-sulphonato-4,1-phenylene)imino[6-(diethylamino)-1,3,5-triazine-4,2-diyl]imino]]bis(benzene-1,4-disulphonate);Fluorescent Brightener 357;2,2/’-(1,2-ethenediyl)bis[5-[[4-(diethylamino)-6-[(2,5-disulfophenyl)a
• Storage: 20°C
• IUPAC Name: hexasodium;2-[[4-(diethylamino)-6-[4-[(E)-2-[4-[[4-(diethylamino)-6-(2,5-disulfonatoanilino)-1,3,5-triazin-2-yl]amino]-2-sulfonatophenyl]ethenyl]-3-sulfonatoanilino]-1,3,5-triazin-2-yl]amino]benzene-1,4-disulfonate
• InChI: InChI=1S/C40H44N12O18S6.6Na/c1-5-51(6-2)39-47-35(45-37(49-39)43-29-21-27(71(53,54)55)15-17-31(29)73(59,60)61)41-25-13-11-23(33(19-25)75(65,66)67)9-10-24-12-14-26(20-34(24)76(68,69)70)42-36-46-38(50-40(48-36)52(7-3)8-4)44-30-22-28(72(56,57)58)16-18-32(30)74(62,63)64;;;;;;/h9-22H,5-8H2,1-4H3,(H,53,54,55)(H,56,57,58)(H,59,60,61)(H,62,63,64)(H,65,66,67)(H,68,69,70)(H2,41,43,45,47,49)(H2,42,44,46,48,50);;;;;;/q;6*+1/p-6/b10-9+
• InChIKey: KMPSLWWDIJFERN-PTNBLCRGSA-H
• SMILES: CCN(CC)C1=NC(=NC(=N1)NC2=C(C=CC(=C2)S(=O)(=O)[O-])S(=O)(=O)[O-])NC3=CC(=C(C=C3)C=CC4=C(C=C(C=C4)NC5=NC(=NC(=N5)N(CC)CC)NC6=C(C=CC(=C6)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+]

Fluorescent Brightener 357(CAT: M015003), also known as 4,4′-Bis(2-sulfostyryl)biphenyl disodium salt, is a fluorescent optical brightening agent widely used in the textile, paper, and detergent industries to enhance whiteness and brightness. This compound absorbs ultraviolet light and re-emits it as blue light, offsetting yellowing and making materials appear whiter and more vibrant. Its stability and solubility in water make it suitable for formulations in laundry detergents and fabric softeners, where it can adhere to fabrics and boost the perceived cleanliness. In paper production, Fluorescent Brightener 357 enhances whiteness for printing and visual appeal, making it an essential additive in consumer goods and material production.