Sinophor® OB-1 / Optical brightener OB-1 CAS 1533-45-5

(2 customer reviews)

Optical brightener OB-1 

Chemical Name: Optical brightener OB-1

Other Name: Fluorescent Brightener 393 ; 4,4′-Bis(2-benzoxazolyl)stilbene ; Fluorescent brightener OB-1

CAS No.: 1533-45-5

Molecular Formula: C28H18N2O2

Molecular weight: 414.45

Optical brightener OB-1 Structure:

Optical brightener OB-1 Structure

Appearance: Yellow greenish powder

Assay: 99%


Optical brightener OB-1 Typical Properties

Item Specifications
Appearance Slight greenish yellow powder
Content (HPLC) 98~98.5%
Melting point 352~358℃
Ash content ≦0.5%
Volatile matter ≦0.5%

What is the difference between Optical brightener OB and Optical brightener OB-1?

Optical brightener OB and Optical brightener OB-1 are completely different chemicals, You can click the link above to see the differences.

Optical brightener OB-1 Usage

1. Optical Brightener OB-1 can be used for whitening polyester fiber, nylon fiber and polypropylene fiber.

2. Optical Brightener OB-1 can be used to whiten polypropylene plastic, rigid PVC, ABS, EVA, polystyrene and Makrolon.

3. Optical Brightener OB-1 can be used for polyester and nylon.

4. Optical brightener OB-1 can also be used for whitening plastics such as ABS, PS, HIPS, PA, PC, PP, EVA and rigid PVC. The addition of OB-1 to nylon fiber, nylon and polyester will also significantly improve the whitening degree.

5. Optical brightener OB-1 adds OB-1 to recycled polyester fiber waste, bottle material and chips, the recycled material will appear whiter, and the chromaticity of different recycled materials will become more consistent.

Optical brightener OB-1 Features

1. high whitening strength and strong fluorescence.

2. wide application scope: polyester, nylon fiber and various plastics.

3. Optical brightener OB-1 is particularly resistant to high temperatures, and is mainly used for whitening by hot-melt pad dyeing, suitable for whitening polyester fibers and whitening polyester, cotton and other fiber blended fabrics.

4. Optical brightener OB-1 is an excellent oxazole brightener, insoluble in water, stable in performance, and has good resistance to sunlight, chlorine bleaching and migration.

Optical brightener OB-1 Application method

Recommended dosage: for each 1000 kg material
1.EVA, polypropylene fiber, nylon and Makrolon: 75~200g
2.polyster fiber: 75~300g

Optical brightener OB-1 Packaging and Shipping

Packaging according to customer requirements (25 kg) cartons, paper bucket, paper bags. Packaging according to customer requirements. Dry, dark save.


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2 reviews for Sinophor® OB-1 / Optical brightener OB-1 CAS 1533-45-5

  1. Clayton

    What you published made a lot of sense. However, consider this, suppose you typed a catchier
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    suppose you added a post title to maybe get folk’s attention? I mean China Optical brightener
    OB-1 manufacturer and supplier – Longchang chemical is kinda boring.

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      Thank you very much for your suggestion, Dear Clayton, we will try to change the new wording.

  2. Connor

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      I’m sorry, I don’t currently have the technology to prevent content from being stolen

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