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Shanghai Linebon Fine Chemical Co., Ltd.

Optical Brightener, Brightener, Chemical manufacturer / supplier in China, offering Optical Whitener C. I. 31# for Washing, Fluorescent Brightening Agent Er-2 C. I. 199 CAS 13001-38-2 for Plastic, CAS 27344-41-8 CBS-X for Washing Fluorescent Whitening Optical Brightener and so on.

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Supplier Homepage Product Optical brightener washing industry Optical Whitener C. I. 31# for Washing

Optical Whitener C. I. 31# for Washing

FOB Price: US $2.1-2.5 / kilogram
Min. Order: 100 kilogram
Min. Order FOB Price
100 kilogram US $2.1-2.5/ kilogram
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Production Capacity: 500tons/Year
Transport Package: Drum/PP Bag
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: C. I. 31#
  • MW: 907.29
  • Sample: Available
  • Valid Date: 2 Years
  • Specification: SGS
  • Mf: C36h33cln12o8s2na2
  • Other Name: Fluorescent Whitening Agent
  • Delivery Date: Within 1 Week
  • Trademark: linebon
  • Origin: China
Product Description

optical whitener Agent 31


MOLECULAR WEIGHT: 907.29 (As International Relative Atom Mass 1991)





Light yellow powder

Fluorescent strenghth (equivalent to the standard sample)


Color Shade

Similar to the standard sample

Whiteness (the deviation with the standard sample)           

≥ -0.3

Moisture content                                      

≤ 5%

Content of water-insoluble impurities                  

  ≤ 0.5%

Fineness (residual content passed through 180μm-pore sieve) 

≤ 6%



The difference between Optical brightener 31# and VBL is that one aniline substituent is changed into m-chloroaniline and shows anion character, the pH resist value is 7-12. It can resist 300ppm hard water, resist 0.25% free chlorine, but don't resist to copper and iron ions. It has good sun light resistance and aging resistance. When used in synthetic detergent, it has better whitening effect than VBL on the detergent itself and the cloth it washed, it can be used in one bath with anionic and nonionic surfactants and oxydol, unsuitable for used with cationic surfactants.



1. Fluorescent whitening agent for detergent industry and soap industry.

2. Fluorescent whitening agent for cotton fabric and gluing products and light color or printing products. The affinity with cellulose fiber is not so good as VBL.

3. Fluorescent whitening agent for polyvinyl alcoholic fiber and polyamide fiber.



1. When used in detergent industry, adding directly into the pulp, the dosage is as follow.

Common washing powder: 0.08-0.15%      Soap: 0.1-0.2%

Concentrated washing powder: 0.1-0.2%     Soft agent for fabric fiber: 0.1-0.2%

Liquid detergent: 0.1-0.2%                Washing syrup: 0.08-0.15%

2. When used in detergent industry, add the Brightener directly into dyeing bath, dissolved with water then can be in use. The dosage is 0.08-0.3%. bath ration: 1:40, the opmital bath temperature: 60oC.


PACKAGE: Packed in cardboard bucket after being packed in plastic bag. Net weight is either 25 Kg or 50 Kg per bucket or sack.


TRANSPORTAION: Should be handle carefully, avoid sunlight and moisture.


STORAGE: Should be stored in cool, dry and ventilate place, and storage period should not exceed 2 years.

Why us :
1. High quality under strict QC/QA system with GMP factory price and best service.
2. Fast and safe delivery with secure and discreet shipment.

3. Double check before delivery to make sure correct.

4. Third-party Inspection
5. Providing complete services with our resource integration, we can thus create more competitive advantages for you!

Thank you for ordering and hope you enjoy your purchase here. Your comments are always welcomed and very important in our long-term business corporation.

FREE SAMPLES can be sent for your evaluation!
Contact me now for further business :-)

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Optical Whitener C. I. 31# for Washing


Optical Whitener C. I. 31# for Washing


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