Fluorescent Brightener PB

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Product Name:?Fluorescent Brightener PB
Chemical Name:??2,2′-(2,5-thiophenediyl)bis-benzoxazole
:?2,2′-(2,5-thiophenediyl)bis-benzoxazole;2,5-di(benzoxazol-2-yl)thiophene;2,5-Bis(2-benzoxazolyl)thiophene;fluorescent brightener 185;C.I. Fluorescent Brightener 172;c.i. 515240;2,2′-thiophene-2,5-diylbis(benzoxazole);Benzoxazole, 2,2-(2,5-thiophenediyl)bis-
CAS No:?2866-43-5
MW: 318.35
: ?Fluorescent Brightener

Descriptions of?Fluorescent Brightener PB:

This product is light yellow crystalline powder, melting point 216-220 ° C (chlorobenzene recrystallization). Melting point 218 ~ 219 ℃. With water in any proportion immiscibility. Resistant to hard water, acid and alkali. With it after the fabric of light fastness, chlorine bleach, wash fastness is better. Insoluble in water. Soluble in organic solvents and concentrated acid, with a bright blue fluorescence, The maximum absorption wavelength was 367 nm (DMF); The maximum emission wavelength was 429 nm.


Mainly used in commercial brightener EB, can also be used for various types of polyolefin plastic, BS engineering plastics, glass and others’ whitening.

This product is used as whitening treatment agent for vinegar fiber, nylon fiber, polyester fiber, polypropylene fiber, polyester fiber and blended fiber.

Storage: Storage should be cool and ventilated, away from heat, fire, to prevent sun exposure, heat is strictly prohibited.
Package:?25kg PP bag for solid powder. 200L or 250KG Drum for Liquid.

Specifications of Fluorescent Brightener PB:

Appearance light yellow powder
Content ≥99.5%
Moisture ≤0.1%
Insoluble ≤0.1%
Melting point 216-220°C
Particle(100mesh) ?100%

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