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HS Code |
160481 |
| Chemical Name | 1,3:2,4-Bis(5-methyl-2-benzoxazolyl)thiophene |
| Cas Number | 7128-64-5 |
| Appearance | yellowish-green crystalline powder |
| Molecular Formula | C26H18N2O2S |
| Molecular Weight | 422.50 g/mol |
| Melting Point | 201-203°C |
| Solubility | insoluble in water, soluble in organic solvents |
| Ionic Nature | nonionic |
| Maximum Absorption Wavelength | 374 nm |
| Maximum Fluorescence Wavelength | 434 nm |
| Light Fastness | excellent |
| Thermal Stability | high |
| Main Applications | brightening of thermoplastics such as PVC, PS, PE, PET, PP |
| Shade | blue-violet fluorescence |
| Dosage Recommendation | 0.01–0.05% |
As an accredited Optical Brightener OB-2 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Optical Brightener OB-2 is packaged in 25 kg fiber drums, lined with plastic bags for moisture protection, and securely sealed. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for Optical Brightener OB-2: Typically 10 metric tons packed in 25kg fiber drums, securely palletized for export. |
| Shipping | Optical Brightener OB-2 is typically shipped in 25 kg fiber drums or cartons with inner polyethylene bags to prevent moisture exposure. It should be stored and transported in a cool, dry, and well-ventilated area, away from direct sunlight and incompatible materials, ensuring containers are tightly sealed to maintain product integrity. |
| Storage | **Optical Brightener OB-2** should be stored in a cool, dry, well-ventilated area away from direct sunlight and moisture. Keep the container tightly sealed and store away from incompatible substances such as strong acids and oxidizers. Avoid extreme temperatures to prevent product degradation. Handle with care to avoid dust formation, and use proper personal protective equipment when handling or transferring the chemical. |
| Shelf Life | Optical Brightener OB-2 has a shelf life of 24 months when stored in a cool, dry place in sealed containers. |
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Purity 99%: Optical Brightener OB-2 with 99% purity is used in polyester fiber production, where it ensures maximum fluorescence and whiteness stability. Melting Point 201°C: Optical Brightener OB-2 with a melting point of 201°C is used in high-temperature plastic extrusion, where it maintains consistent optical effects without thermal degradation. Particle Size <5μm: Optical Brightener OB-2 with particle size below 5μm is used in masterbatch formulations, where it promotes uniform dispersion for superior gloss and brightness. Thermal Stability up to 300°C: Optical Brightener OB-2 with thermal stability up to 300°C is used in polycarbonate molding, where it prevents yellowing at elevated processing temperatures. High Absorption Peak at 374 nm: Optical Brightener OB-2 with an absorption peak at 374 nm is used in PVC film manufacturing, where it achieves optimal blue-white visual enhancement. Low Volatility: Optical Brightener OB-2 with low volatility is used in automotive coatings, where it reduces evaporative losses and ensures color fastness during curing. Solubility in Organic Solvents: Optical Brightener OB-2 soluble in common organic solvents is used in liquid ink systems, where it provides consistent tinting strength and luminosity. Moisture Content <0.5%: Optical Brightener OB-2 with moisture content below 0.5% is used in engineering plastics, where it prevents agglomeration and maintains processing efficiency. UV Stability: Optical Brightener OB-2 with high UV stability is used in outdoor polypropylene sheets, where it preserves whiteness after prolonged sunlight exposure. Compatibility with Additives: Optical Brightener OB-2 compatible with UV absorbers and antioxidants is used in synthetic leather production, where it enhances aesthetic appeal while maintaining product durability. |
Competitive Optical Brightener OB-2 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615651039172 or mail to sales9@bouling-chem.com.
We will respond to you as soon as possible.
Tel: +8615651039172
Email: sales9@bouling-chem.com
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