Fluorescent brightener 71 is kind of additives can absorb UV light then emit visible blue light to reduce the yellowish and make the products more white.
Fluorescent brightener 71 mainly Used in detergent industry,for the synthetic detergent,toilet soap and soap .
Fluorescent brightener 71 also Used in the fabric of cotton fiber,nylon,etc taking on excellent whitening effect on artificial fiber,polyamide,vinylon,also has good whitening effect on protein fiber,aminoplastics.
Product Name Fluorescent brightener 71
CAS No. 16090-02-1
C.I. No. 71
Technical Index Molecular formula: C40H38N12O8S2Na2
Relative molecular weight: 924.93 (according to international relative atom mass, 1997)
Maximum absorptive ultraviolet wavelength: 350nm
Exeutive standard: HG/T3675-2000
used in detergent used in textiles
1) Appearance white or straw yellow uniform powder
2) Ultraviolet absorption (E) ≥ 370
3) Brightening efficiency (compare with standard) , % - 100
4) Color light (compare with standard) - similar to-quite low
5) Water content, % ≤ 5.0
6) Insolubel impurities in water, % ≤ 0.5
7) Fineness (425um residue) , % ≤ 5.0
Properties and use: Optical Brightener CXT is a recognized excellent brightener for detergent, with improved acid
resistance and perborate resistance. It can be used to brighten cellulose fibers, polyamide fibers
and textiles.Optical Brightener CXT is ionic, with blue fluorescence. It has higher chlorine-resistant
brightening efficiency than that of VBL and 31#. The most suitable PH value of dying bath is 7～10. Its
light fastness is Grade 4. When used in detergent powder, its advantages are: high compatibility, high
accumulative washing brightness, and adjustable dosage in industry.
Application method: 1. Can be used in detergent, detergent powder, soap and perfumed soap to bring up bright and attractive
2. Can be used to brighten cotton fiber, nylon and such textiles, has excellent brightening efficiency to
artificial fibers, polyamide fibers and vinylon, and has good brightening efficiency to protein fibers and
Solubility of Optical Brightener CXT in water is lower than brightener VBL and 31#. It can be diluted
to 10% suspending solution with hot water for use. The solution should be kept out of the sun. Its dosage
in detergent powder is 0.1-0.5%; in printing and dyeing industry is 0.1-0.3%.
Packing:It is packed in carton drum lined with plastic bag; net weight: 25kg/drum or 50kg/drum.