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Optical Brightener OB/Fluorescent Brightener OB 184 in Mexico

white powder
Color shade
400-800 mesh
10kg/25kg per fiber drum
Shelf Life
2 years
by sea or by air
Molecular formula
Color light

Optical Brightener OB C.I NO.184,CAS NO.:7128-64-5,Melting point:200℃,mainly used for coating,paint,PVC,PP,PS,PET etc all kinds of plastics.

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Optical Brightener OB/Fluorescent Brightener OB 184 in Mexico

Mexico is the second largest plastic consumer market in Latin America and the 12th largest plastic consumer market in the world, with an average annual consumption of 6.235 million tons of plastics and an annual processing of 5 million tons of plastic products; about 53% of its plastic products are used to make bottles or packaging, Other products are heavily used in construction, furniture, toys and agriculture. Due to Mexico's low-cost advantage, many plastic processing companies have moved into Mexico, which has contributed to the growth of Mexico's plastics industry.Optical brightener as the important plastic auxiliary paly an important role.

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Optical Brightener OB/Fluorescent Brightener OB  - Basic Information

Chinese name:2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene

English name :2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene

Other chemical name:Optical Brightener OB

                               Fluorescent whitening agent 184

                               Optical Brightener OB-4

                               Fluorescent Brightener OB

                               Fluorescent brightening agent 184

                               Fluorescent Whitening Agent OB

                               Optical Brightening Agent OB

                               Fluorescent Brightener 184

                               C.I. 184

                              Fluorescent Brightener OB-4

                               Fluorescent brightening agent 184

                               CAS 7128-64-5


EINECS No.: 230-426-4

Chemical formula :C26H26N2O2S

Molecular weight :430.562

Density :1.185g/cm3

Melting point :196-202℃

Boiling point: 531.2°C at 760 mmHg

Flash point: 275.1°C

Soluble in acetone and toluene. Insoluble in water.

Vapor Pressure 7.83E-11mmHg at 25°C

Refractive index: 1.617

Acidity coefficient :3.03±0.10(Predicted)

Storage: Conditions Keep in dark place,Sealed in dry,Room Temperature

Stable. Incompatible with strong oxidizing agents.

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Physicochemical properties :

Chemical properties :Optical brightener OB is yellow-green powder,seems white powder

The melting point is 200~201℃, 

the decomposition temperature is higher than 220℃. 

Insoluble in water soluble in alkanes, fats, mineral oils, waxes and common organic solvents. 

Solubility/(g/100 ml): methanol 0.05; acetone 0.5; toluene 5.3; carbon tetrachloride 5.9; tetrahydrofuran 5.5; DMF 0.8; chlorobenzene 10.2; cyclohexane 3.3; xylene 5.5; dioctyl phthalate Ester 0.7; water 0.01. 

The maximum absorption wavelength is 374nm.

Product use:Fluorescent brightener mainly used for whitening of PVC, PS, PE, PP, ABS and other plastics and acetate fibers, paints, coatings, inks, etc.

Risk Terms 36/37/38 - Irritating to eyes, respiratory system and skin.

Safety Phrases S24/25 - Avoid contact with skin and eyes.


Upstream raw materials: 2,5-thiophene dicarboxylic acid p-tert-butyl-o-aminophenol Adipic acid Thionyl chloride

Optical Brightener OB/Fluorescent Brightener OB 184 can be used for all kinds of plastics and resine,because of its good compatibility,high melting pointa and good weather reesistance.

Optical Brightener OB compared with optical brightener FP-127 ,its weather reesistance is better.

Optical Brightener OB compared with optical brightener OB-1 ,its whitness and color shade is better.

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