Optical Brightener OB-1(C.I.393)

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$1.00 - $15.00 / Kilograms | 100 Kilogram/Kilograms (Min. Order)
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Quick Details
Chemical Auxiliary Agent
CAS No.:
Other Names:
Fluorescent brightening agent 393 (C.I. 40674)
98.5% min, 99%min
Place of Origin:
Hubei, China (Mainland)
Paper Chemicals
Brand Name:
Model Number:
300 mesh min
crystalline powder
Melting Point:
Absorption spectrum maximum:
Fluorescence-emission wavelength maximum:
Supply Ability
Supply Ability:
100 Metric Ton/Metric Tons per Month
Packaging & Delivery
Packaging Details
25 Kgs/drum
Lead Time :
10 Days


Product Description



1.General information of Optical Brightener OB-1
Product name: Optical Brightener OB-1

Synonyms: 2,5'-bis[2-(5-tert-buty l-2 benzoxazoly)thiophene; Fluorescent Brightener 184; 2,2’-(2,5-thiophenediyl)bis(5-(1,1-dimethylethyl)-benzoxazol 
CAS No.:7128-64-5 
Structural No.: C.I.184 
Molecular formula: C26H26SO2N2


Structural formula:



Molecular weight: 430 
Appearance: Slight greenish yellow powder 
Melting Point:200-202oC 
Assay: 98% min


There are approximately 400 brightener types listed in the Colour Index, but less than 90 are actually produced commercially and only a handful are commercially important. Generically, the C.I. FBA number can be assigned to a specific molecule, however, some are duplicated, since manufacturers apply for the index number when they produce it. The global OBA production for plastics, textiles and detergents is dominated by just a few di- and tetra-sulfonated triazole-stilbenes and a di-sulfonated stilbene-biphenyl. These are subject to fading when exposed long term to UV, due to the formation of optically inactive stilbene cis-isomers found at the center of the molecule. Exposed to gases and especially oxygen they will fade too, like most dye colorants. All brighteners have extended conjugation and/or aromaticity, allowing for electron movement. Some non-stilbene brighteners are used in more permanent applications such as whitening synthetic fiber.



2.Application of Optical Brightener OB-1

Optical brightener OB-1(CAS No.:1533-45-5) and Optical Brightener OB are chemical compounds that absorb light in the ultraviolet and violet region (usually 340-370 nm) of the electromagnetic spectrum, and re-emit light in the blue region (typically 420-470 nm). Fluorescent activity is a short term or rapid emission response, unlike phosphorescence, which is a delayed emission. These additives are often used to enhance the appearance of color of plastic and fabric , causing a "whitening" effect, making materials look less yellow by increasing the overall amount of blue light reflected.


Optical Brightener OB-1 is a fluorescent whitening agent of the thiophenediyl benzoxazole class, is commonly added to plastic products to replace whitening agents removed during producting proces. Optical brightener ob-1 is highly effective in polymer substrates such as engineering plastics,PE,PC,PVC,PS,ABS and PP,adhesive and other organic substrates.especially rigid plastic(Polyethylene pipe, polypropylene pipe, Thermoplastics pipes, Thermosetting plastic pipe, etc), resulting in their strongly fluorescent appearance under UV illumination.

Optical Brightener OB-1 is also used in papers and fiber, Paper brightness is typically measured at 457 nm, well within the fluorescent activity range of brighteners. Paper used for banknotes does not contain optical brighteners, so a common method for detecting counterfeit notes is to check for fluorescence.







3.Why us?

1. Good quality : within 98%min purity, we just do best quality and best reputation.


2. Rich export experience: Our Optical Brightener OB-1 has been exporting to Europe, America,Southeast Asia, the Middle East,etc. for 7 years.


3.The manufacturer of Optical Brightener OB-1(CAS No.:1533-45-5) . 








Packaging & Shipping



Package: Packed in 25kgs fiber drum with double PE liners, or according to customers' request;


Delivery time: In 7– 10 days;


Shipping methods:By air or by sea. 

The photos of our packaging and shipment.



Our Services


  1. 1.     Good quality and pretty competitive price;
  2. 2.     Samples free of charge;
  3. 3.     Fast delivery time;
  4. 4.    Packaged with 25kgs / drum according to buyers’ special request.


Company Information



Guangzhou Shiny Co., Ltd., established in 2007, is a dynamic technology-based chemicals company, dedicated to the development, production and marketing in the fine chemical industry, composed of 4 manufacturing bases, 3 R&D centers and one import & export company.


We have obtained ISO9001:2008 international quality certification. Our services cover the whole range from small amount (kilogram) for research to large bulk of multi-tons for industrial production, synthesis capacity from 1 liter to 3,000 liters are available. GMP compliant quality assurance system and stringent regulations on cosmetic and pharmaceutical industries enable us to enjoy more trust and cutting-edge strength in the local and world market.


Guangzhou Shiny focuses on the following sectors:

--Aromatic Compounds, Cinnamic derivatives, Esters of Phenylacetate, etc.

--UV Absorbers, for cosmetic, rubber and plastics, etc.

--Personal care and home-care ingredients (disinfectors, surfactants, etc.)

--Optical brighteners for detergent and plastics, etc.

--Pharmaceutical intermediates

-- Active Pharmaceutical Ingredients(API)


To become Your One Stop Specialty Chemicals Supplier is the goal we are striving to reach. 

We are committed to surpassing your expectations and hope by timely delivering the best quality products at the most competitive prices from China, and providing considerate and reliable after-sales service and support.





1.Q: What are you target clients?

Importers or customers who in market for PVC, masterbatches and so on.


2.Q: Do you supply free samples?

Samples are free of charge.


3.Q: How do you make a price offer and how long is its validity?

By e-mail 15days.


4.Q: What payment terms do you accept?

L/C, T/T, DP.


5.Q: Do you accept third party inspection?

Yes.we do.


6.Q: Where do you load the goods?

Any port in China.


7.Q: Is the product harmful to human health?

According to the product property.


8.Q: What types of containers are used to package products from your company?

20'FCL,40FCL or as customer requirement.


9.Q: Can I pay with a credit card?

Of course you can.


10.Q: Is your company able to accept custom and meet customer specific specification requirements?

Yes, of course.




To become Your One Stop Specialty Chemicals Supplier is the goal we are striving to reach. We are committed to surpassing your expectations and hope by timely delivering the best quality products at the most competitive prices from China, and providing considerate and reliable after-sales service and support.




For More Products: http://sinoshiny.en.alibaba.com/

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