CAS Registry Number

CAS 2866-43-5 — 2,5-Bis(2-benzoxazolyl)thiophene

2,5-Bis(2-benzoxazolyl)thiophene is a conjugated heterocyclic compound known as Fluorescent Brightener 185, widely used as an optical brightener for plastics, synthetic fibres and coatings, and also employed as a fluorescent dye and scintillator. It acts as a fluorescent whitening agent, absorbing ultraviolet light and re-emitting it as blue light. CAS 2866-43-5, molecular formula C18H10N2O2S, molecular weight 318.3492. Stored at ambient conditions with no signal word required. Molekula supplies 2,5-Bis(2-benzoxazolyl)thiophene from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

Also known as: 2-[5-(1,3-benzoxazol-2-yl)thiophen-2-yl]-1,3-benzoxazole · 2,2'-(2,5-Thiophenediyl)bis-benzoxazole · 2,2'-Thiophene-2,5-diylbis(benzoxazole) · 2,5-Bis(benzo[d]oxazol-2-yl)thiophene · Benzoxazole, 2,2'-(2,5-thiophenediyl)bis- · Fba 185 · Fluorescent Brightener 185 · SOF (fluorescent brightener) · Thiophenebis(benzoxazolyl) · Uvitex EBF