Optical Brightener FBA351 (Tinopal CBS-X, UVITEX NFW)

INCI name: Disodium-2,2'-([1,1'-biphenyl]-4,4'-diyldivinylene)bis(benzenesulfonate)
Alternative names: C.I. Fluorescent Brightener 351; C.I. 482200; C.I. Fluorescent Brightening Agent 351; Brightener CBS-X; Calcofluor CG; CBS-X; CF 351; DSBP; FB 351F; Fluorescent Brightener CBS; Fluorescent Brightener CBS-127; Fluorescent Brightener CBS-X; Fluorescent Brightener CF-351; Fluorescent Brightener CPC; Fluorescent Whitening Agent CBS; Lemonite CBS-X Powder; Optiblanc SX; Optical Brightener CBS; Optical Brightener CBS-X; Parawhite HTSK; Permabrite SPX; Rylux NT; Stilbene 3; Stilbene 420; Tinopal CBS; Tinopal CBS-X; Tinopal SK; Uvitex NFW; 4,4'-Bis(2-sodiosulfostyryl)biphenyl; 4,4'-Bis(o-sulfostyryl)biphenyldisodium salt; Benzenesulfonic acid, 2,2'-([1,1'-biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis-,disodium salt; Benzenesulfonicacid, 2,2'-(4,4'-biphenylylenedivinylene)di-, disodium salt; Disodium4',4''-bi[stilbene-2,2'''-disulfonate]

General introduction of Optical Brightener FBA351

Chemical formula: C28H20Na2O6S2
Molar mass: 562,564 g/mol
CAS Nr.: 27344-41-8
Deleted CAS Nr.: 63439-81-6, 71124-07-7, 1173311-32-4, 2051924-63-9
EINECS Nr.: 248-421-0
ECHA Infocard: 100.044.005
PubChem: 5332133
ChemSpider: 4489283
Optikai Fehérítő 351 molekulaszerkezet
Optical Brightener FBA351 has very effective whitening and excellent light fastness properties. It provides brilliant whiteness for the cellulose fibres on all washing temperatures, even at low and medium temperatures. It is suitable for conventional, liquid detergent, industrial detergent, washing gels, fabric softeners. It is well soluble in cold water and resistant to the oxidizing agents like hypochlorite and peroxides, reducing agents, and the slightly acidic and highly alkaline environment (pH 5-12). Recommended dosing calculated on the detergent quantity 0,05 - 0,25% for washing powders, 0,05 - 0,40% for washing liquids, 0,02 - 0,05% for fabric softeners, 0,2 - 1,0% for industrial detergents. The whitening effect of the product is based on the fluorescence emission in the visible blue range of the absorbed UV light which eliminates the yellow tone that show the of the textile whiter (less yellow). The compound's absorption maximum: 349 nm, the absorbance value of 1% solution in 1143 ±38. The radiated light has a maximum intensity at 435 nm. The product solubility is 25 g/l at 25°C in distilled water, and about 300 g/l at 90°C. It is used in the paper industry also to increase the optical whiteness. It is also suitable to track karst water as a fluorescent tracer to other dyes like fluorescein sodium (uranin, C.I. Acid Yellow 73), Rodamine B (C.I. Basic Violet 10), Eosin (C.I. Acid Red 87) and Sulforodamine B (C.I. Acid Red 52), as each of these compounds have different characteristic fluorescence wavelengths.


Tulajdonság specification unit of measure
Appearance Greenish yellow powder
Odor Weak, charactaristic
Purity 90,0 ±3 % (m/m)
Water unsolubles ≤ 0,5 % (m/m)
Water solubility
(distilled water, 70°C, 100 g/l)
clear, without sediments


Classification according to 1272/2008 EU-GHS (EC)
Serious eye irritation Class 2
Warning pictogram
H319 Causes serious eye irritation.
P280 Wear eye protection.
P264 Wash hands thoroughly after handling.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P337+P313 If eye irritation persists: Get medical advice/attention.
Information regarding to transport
The product is not classified as dangerous for transport.

Other information

Customs tariff number: 3204200030
Article number: 95244943 (200 g/bottle)
Article number: 95244816 (1 kg/bottle)
Article number: 95244823 (5 - 20 kg/carton box)
Article number: 95244830 (20 kg/carton box)


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