Whitening Agent OB-1Y (Yellow Shade)
Optical Brightener OB-1Y (Yellow Shade)
Whitening Agent| OB-1
Basic Specifications
| Product Name | Whitening Agent OB-1Y (Yellow Shade) |
| English Name | Optical Brightener OB-1Y (Yellow Shade) |
| CAS Registry Number | 1533-45-5 |
| C.I. Number | Fluorescent Brightener 393 / C.I. 393 |
| Molecular formula | C₂₈H₁₈N₂O₂ |
| Molecular Weight | 414.46 |
| Product Categories | Whitening Agent |
| Product Line | OB-1 |
| Hue | Huang Xiang |
| Appearance | Bright yellow crystalline powder |
| Density | Approx. 1.4 g/cm³ |
Product Features
- Significantly brightens and whitens — strong fluorescence effectively neutralizes yellowing in plastics, enhancing whiteness and brightness.
- Excellent heat resistance — melting point 353-359°C; withstands processing temperatures up to 360°C. One of the most heat-stable brighteners available.
- Pure color — Yellow-toned light provides a warm white whitening effect with soft tones.
- Excellent chlorine resistance — outstanding performance
- Acid and alkali resistant — stable performance within pH 3-11 range
- Low dosage — Transparent parts require only 0.0025-0.005%, keeping costs low.
Application Areas
Plastic Whitening — PP, PE, ABS, PS, PC, PA, EVA, Rigid PVC, and moreChemical Fiber Brightening – Polyester, Nylon, and Polyamide FibersWhitening recycled materials — Enhance the whiteness of recycled PET flakes and chips.Masterbatch — Whitening Masterbatch ProductionFilm Injection Molding — Whitening and Brightening for Plastic Films and Molded Parts
App Data
| Applicable Systems | Recommendation | Behavior Description |
|---|---|---|
| PP | ✅ Recommended | Usage: 0.005-0.03%; Whitening and brightening, heat resistant up to 360°C |
| PE | ✅ Recommended | Usage: 0.005-0.03%; film brightening |
| ABS | ✅ Recommended | Dosage: 0.005-0.03%; whitening effect on finished products |
| PS | ✅ Recommended | Usage: 0.005-0.03%; whitening for transparent products |
| PC | ✅ Recommended | Usage: 0.005-0.03%; Whitening for engineering plastics |
| PA/Nylon | ✅ Recommended | Usage: 0.005-0.03%; Nylon brightener |
| Rigid PVC | ✅ Recommended | Usage: 0.005-0.03%; Whitens profiles and pipes |
| EVA | ✅ Recommended | Usage: 0.005-0.03%; Whitening agent for shoe materials |
| polyester fiber | ✅ Recommended | Usage: 0.005-0.03%; undiluted formula for whitening |
Notes
- Please test with a sample first to confirm the optimal dosage and heat resistance conditions.
- The powder color chart may differ from the final product color. Please refer to the actual colored result.
- Evaluate weather resistance for long-term outdoor exposure.
- Strictly control the addition amount (transparent products: 0.0025-0.005%); excessive amounts may cause a blue fluorescence.
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