OB-ER-II
Optical brightener ER-II has bluish color shade with high whitening brightening effect and excellent fastness to sublimation. Mainly used as whitening agent for polyester fiber, as well the raw material of making paste form brightening agent in textile dyeing.
Key Features
Technical Specifications
| C.I. NO. | C.I. 199:1 |
| CAS Number | 13001-38-2 |
| Appearance | Yellow powder |
| Purity | ≥99% |
| Melting Point | 183-185°C |
| Molecular Formula | C24H16N2 |
Physical Data & Fastness Properties
| Shade/Tone | Bluish |
| Max Absorption Wavelength | 369nm |
| Heat Resistance | Good |
| Light Fastness | Good |
| Weather Fastness | Good |
Applications
- Polyester fiber whitening
- Textile dyeing (paste form brightening agent)
Usage Instructions
Mainly used as whitening agent for polyester fiber, as well the raw material of making paste form brightening agent in textile dyeing.
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