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Optical Brightener OB-1

Optical brightener OB-1 allso called fluorescent brightener OB-1, optical brightener agent OB-1, OB-1 has the highest melting point among the optical brighteners, and is also the most widely applicable and the most sold brightener. Optical brighteners OB-1 have two appearance colors, yellow and green.

Optical Brightener OB-1 produced from China only,but world wilde use it to all kinds of plastics,or make master batches,then the optical brightener masterbatches and compound are used in the plastics industry.

As a professional optical brighteners OB-1 manufacturer, we have our own optical brighteners OB-1 factory. We are leading the optical brighteners OB-1 industry to a higher end. 

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Product Name: Optical Brightener OB-1

Chemical Name:2.2’-(4.4’-diphenol vinyl) dibenzoxazol

CAS No.:1533-45-5

C.I. No.:393

Molecular Formula:C28H18N2O2

Molecular Weight:414 

Technical Index:Appearance:yellowish green powder 

Melting Point:357~359°C 


Recommend Dosage:200-500g per 1000kg material

Package:10KG/25kg per fiber drum with 450kg or 500 kg or 675kg/pallet


In plastics, the amount of fluorescent whitening agent is usually expressed as a percentage relative to the mass of the plastic. 

The usual amount of transparent plastic is 0.0001%-0.001%, and the amount of white plastic is usually 0.05%-0.1%.

In paint and ink, the amount of fluorescent whitening agent is usually 0.02%-0.05%. When it comes to the specific dosage, 

it is recommended to get some small samples from the fluorescent whitening agent manufacturer, because less fluorescent whitening 

agent will easily cause whitening The effect is unsatisfactory. Using too much will cause the brightener to separate out, so before determining 

the dosage, take a sample test to achieve our desired effect.

Welcome to purchase optical brightener OB-1, we provide high quality optical brightener OB-1 with factory price.

The Optical Brightener OB-1 masterbatch is an additive on plastics, mainly for whitening. The Optical Brightener used for plastics is powder, but the Optical Brightener masterbatch is granular, which is easier to stir.
Optical Brightener is a kind of white pigment or dyestuff,most is powder form with yellow green appearance.Optical Brightener powder can be added into the raw material together,then mix it is ok.
Optical Brightener OB-1 can make the recycle PET more white to get high grade Polyester Stable Fiber.It has high fineness, high temperature resistance and less dosage(300-500g per 1000 kg material).
Raytop Chemical have a new formular that is a kind of advanced optical brightener OB-1 which is used for PE film with a very good performance.
Raytop Chemical is as the China Top 3 supplier,have 15 years production and marketing experience, we can supply low price but high purity Optical Brightener OB-1
Raytop Chemical is as the China Top 3 manufacturer,have 15 years production and marketing experience, we can supply low price but high purity Optical Brightener OB-1
Optical Brightener OB-1 with Yellow and Green apperance,most customers use it on PVC Profile,PVC window,PVC door,PVC Pipe,PVC board etc
Optical Brightener OB-1 has two appreances: yellow and green,CI. NO.393,CAS NO.1533-45-5,it is popular in plastics industry,such as master batches,kinds of compund,PVC ,PET,PP,ABS etc.