Optical brightener OB is compounds used in various industries to enhance the brightness and whiteness of materials, reflect ultraviolet light, and improve visual appearance.

Specifications:
|
Item |
Standard |
|
Appearance |
light yellow powder |
|
Shade |
blue-white (similar to standard sample) |
|
Purity (%) |
98min |
|
Melting point (℃) |
200~202 |
|
Volatile(%) |
0.15max |
|
Fineness |
more than 200 mesh |
Product Name: Optical Brightener OB, Fluorescent Brightener OB
Chemical name: 2.5-bis (5-terbuty1-2-benzoxazolyl) thiophene
CAS NO. 7128-64-5
C.I. NO. 184
Molecular formula: C26H26N2O2S
Molecular weight: 430g/mole
Recommended dosage:
0.01%~0.05%, and the specific dosage should be adjusted according to the formula.
Key Attributes of OB Optical brightener:
• Colors appear more vibrant.
• Eco-friendly, Non-toxic.
• Outstanding brightening performance.
• Produce a bluish tinge, masking yellowness.
• Ultra-white appearance.
Applications:
Optical Brightener OB, is also OB Fluorescent whitening agent. This kind of whitening agent can be widely used in plastics, man-made fibers, printing inks, coatings, flexible PVC and polyethylene, etc.
Packing and Quantity:
25kgs fibre drum, around 5.25mts/20’fcl without pallet.
Storage: Keep Optical brightener OB powder in cool and dry place, far away from high temperature and sunshine.






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