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Optical Brighteners

FOB Reference Price / Min.Order Quantity : Get Latest Prices
Processing Time: 1 Days - 60 Days

Port: Shanghai / Shenzhen / Qingdao / Ningbo / Other

Payment Terms: L/C , T/T , other

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Basic Information

  • CAS No
  • Appearance
    light yellowwhite powder
  • Assay
    99 per cent Min
  • Melting point
    201-202 C
  • Packing
    Packaged in 25kg complex paper bags or fiber drums.

Brief description

Packaging Detail:25kg/drum

Delivery Detail:within a week

Detailed description

OB is a thiophenediyl benzoxazole class optical brightener suitable for various thermoplastic polymers, painting ink,
coating, paint.
Structural Formula:
Details  :
CAS No: 7128-64-5
Appearance: light yellow or milk white powder
Assay: 99%Min Melting point: 201-202ºC
1. Small consumption, strong whitening intensity, small consumption can bring a very good whitening result.
2. Wide service behavior, suitable for various kinds of plastic whitening.
3. Have a good compatibility with plastic, good resistance to high temperature and excellent light fastness and weathering
OB as an excellent brightener has been used in various thermoplastics including PVC, PS, PE, PP, ABS, Polyolefin and
other organic materials, It can also be used in coating, paint and ink, has good compatiblity with many substrates, has been
widely used in plastic industry because of good heat-resistance, low addition amount and exceptional whitening effect. It
shows special bright shade combined with some dyes. it is suitable for food packing but local regulations must be
Method of usage:
The recommended loading concentrations for light color polyolefin is 0.0005 % to 0.0010% and the loading levels in other
plastics range between 0.005% and 0.100% depending on substrate, processing conditions, and long-term stability
requirements.   When OB is used with UV absorbers, pls noted, the loading levels must be increased.
Please Noted: above recommended loading can be a reference. Exact loading must be 
determined by compositions of the specific polymer system

Richfortune Chem:
A Global Leader in Specialty Additives, Intermediates and Heat Transfer Fluids

In 1992, we firstly developed and tried to produce Optical Brightener OB. 
In 1995, we started to manufacture 2,5-thiophenedicarboxylic acid(also called OB acid) and other kinds Optical Brighteners( OB-1, FP-127, ER) .
In 2005, we started to make Biphenyl series, Optical Brightener CBS-X and Heat Transfer Fluids. the capacity of Biphenyl has been over 8000mt/a. Heat Transfer Fluids can reach 10000mt/a capacity.
In 2012, we started to expand production capacity of some products, such as 6500mt/a diphenyl oxide, 3000mt/a p-toluic acid, 3800mt/a partial hydrogenated terphenyl, 2000mt/a 2-formylbenzenesulfonic acid sodium salts, 600mt/a ferrocene.

After decades fast development, now our products include:
Additivesoptical brighteners; Antioxidants; UV Absorbers; Flame Retardants, Photo Initiators, Accelerators; Ferrocene, Etc
Heat transfer fluids: 
Biphenyl+Diphenyl Oxide Mixture(RFCTHERM-400), Partial Hydrogenated Terphenyl(RFCTHERM-PHT-350), Etc
P-toluic acid, P-Tolunitrile, 2-amino Phenol, Biphenyl, Diphenyl Oxide, 1,4-naphthalene dicarboxylic acid, 2-Formylbenzenesulfonic acid sodium salt, Etc

We also focus on inorganic chemicals (Especially in High purity Strontium and Barium salts.
Today, our products have been exported to many countries, we also have become a global leader in above fields.

A Commitment to Our Products:
All our products are supported by our Quality System and testing and R&D laboratories, we offer expert technical support and valuable services based on our professional knowledge over decades, We apply this approach to create a customer experience that is friendly, efficient and seamless, We hope to establish good cooperation relations with colleague worldwide.

A Philosophy of Sustainable and Innovative Development:

We always select environmentally responsible raw materials to manufacture our products, For every product across our entire product line, we constantly looks for ways to reduce environmental impact, everybody is obliged to protect environment, everybody have the right to enjoy green grass, clean water and fresh air.

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Optical Brighteners

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Supplier Details

Dalian Richfortune Chemicals Co.,Ltd.

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