Fluorescent Brightener 185 Chemical Properties

Melting point:

216-220°C

Boiling point:

466.4±30.0 °C(Predicted)

Density 

1.385

refractive index 

1.6000 (estimate)

pka

1.27±0.10(Predicted)

Water Solubility 

9.551ug/L(25 ºC)

EPA Substance Registry System

2,5-Bis(2-benzoxazoyl)thiophene (2866-43-5)

Safety Information

Toxicity

LD50 oral in rat: > 30gm/kg

Fluorescent Brightener 185 Usage And Synthesis

Chemical Properties

This product is light yellow crystalline powder with bright blue fluorescence. Melting point 218～219 ℃. Miscible with water in any ratio. Hard water resistance, acid resistance, alkali resistance. The fabric after using it has good light fastness, chlorine bleaching resistance and washing fastness.

Uses

Fluorescent Brightener 185 is used as a whitening treatment agent for acetate fiber, nylon, polyester, polypropylene, vinyl and blended fibers.

Synthesis

Using o-aminophenol and chlorobenzene as raw materials, Fluorescent Brightener 185 can be obtained after reaction.

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