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By certification 
Firstly,lets see the Optical Brightener OB-1 TDS
Product Name |
Optical Brightener OB-1 |
Chemical name |
4,4′-Bis(2-benzoxazolyl) stilbene |
C.I.NO |
391 |
CAS NO. |
1533-45-5 |
Appearance |
Bright yellowish green crystal powder |
Molecular weight |
414 |
Molecular formula |
C28H18N2O2 |
Melting point |
350-360℃ |
Maximum absorption wavelength |
374nm |
Maximum emission wavelength |
434nm |
Package:
10kg/20kg/25kg per fiber drum
450kg/500kg/675kg per pallet
We can also customize the package according to our customers’ requirements.
FAQ
1.What’s the differences of optical brightener OB-1 green and optical brightener OB-1 yellow?
Except the appearance is green and yellow,others are the same.The TDS (technical data sheet) and white performance are the same too.
2.Why optical brightener OB-1 and optical brightener ER both can used for polyester stable fiber?
Optical brightener OB-1 and optical brightener ER added in different stages, such as Optical brightener OB-1 is added in the PET flakes before drawing, and Optical brightener ER is added after drawing to whiten the yarn. It also can be said that Optical brightener OB-1 is used for the whitening of plastic bottle flakes, while Optical brightener ER is used for the whitening of yarns in textiles.
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