Optical Brightener OB
Optical Brightener
Technical Information
CAS No.: 7128-64-5, 4404-43-7
Molecular Formula: C26H26N2O2S
Application: used in thermoplastic such as PVC, PE, PP, ABS, PS, and unsaturated resin and paint, ink and oil soluble coatings
| Product Name | Optical brightener OB (C.I. 184 / C.I.28 ) | |
| MF | C26H26N2O2S | |
| EINECS No | 230-426-4 | |
| CAS No | 7128-64-5, 4404-43-7 | |
| Chemical Name | 2,5-bis(5-tert-butyl benzoxazoly-2’-)thiophene | |
| Appearance | Light green powder | |
| Purity | ≥98% | |
| Melting point | 198~202 °C | |
| Volatile: | <0.5% | |
| Package | 20kg per carton, 25/30kg per fiber drum with PE liner, or as per the customers’ requirements. | |
| Applications:
It is widely used in thermoplastic such as PVC, PE, PP, ABS, PS, and unsaturated resin and paint, ink and oil soluble coatings. |
||
| Properties:
The product is light green or green powder, non-toxic and tasteless, can dissolve in alkane, fat, mineral oil, paraffin and most organic solvents, the absorption spectra of the largest value for 375 mm (in ethanol). |
||
| Dosage:
PVC whitening: 0.01~0.05%; Polystyrene :0001~0.001%; Polyolefin matrix: 0.0005~0.001%
Printing ink: 0.05- 0.5% |
to improve the light intensity: 0.0001~0.001% ABS:0.01~0.05%; White matrix: 0.005~0.05%
|
|
Why Choose Honor Pigments?
- 🌍 Global Export Expertise — Trusted by customers in 40+ countries for consistent quality and reliable supply
- ✅ Strict Quality Control — ISO 9001 certified with batch-to-batch consistency and zero-defect policy
- 💰 OEM Production Advantage — Competitive pricing without compromising pigment performance
- 🧪 Technical Support — Free color matching, formulation advice and sample testing before bulk order
📩 Need more details?
Request TDS, SDS, or a free sample for testing.
Frequently Asked Questions — Optical Brightener OB
What is Optical Brightener OB used for?
Optical Brightener OB (Optical Brightener OB) is an organic pigment supplied by Honor Pigments for printing inks, industrial coatings, plastics masterbatch, and textile printing. ISO 9001 certified quality with batch-to-batch consistency.
Is Optical Brightener OB suitable for water-based applications?
Yes. Optical Brightener OB can be formulated for water-based ink and coating systems when combined with proper dispersing and wetting agents. Contact Honor Pigments for application-specific grade recommendations.
What technical data is available for Optical Brightener OB?
Full technical datasheets including heat resistance, light fastness, oil absorption, density, pH value, and particle size distribution are available upon request. Honor Pigments maintains 3-year batch records for QC traceability.
How does Honor Pigments ensure batch consistency for Optical Brightener OB?
Every batch undergoes color strength, shade, dispersibility, and particle size testing against internal standards. Results are documented per ISO 9001 procedures and available with each shipment.