Fluorescent Brightener 236 CAS 3333-62-8
Chemical Name: Fluorescent Brightener 236
Synonyms: C.I.Flourescent Brightener 236; 7-(2H-naphtho[1,2-d]triazol-2-yl)-3-phenyl-2-benzopyrone; Hakkol PSR; Leucophor EGM
CAS No.: 3333-62-8
Molecular Fomula: C18H14N2O2
Molecular weight: 290.31596
Appearance: Yellow powder
Assay: ≥99.0%
Fluorescent Brightener 236 (CAS 3333-62-8): Comprehensive Guide for Industrial Applications
Table of Contents
1. Product Overview & Technical Specifications
| Parameter | Fluorescent Brightener 236 | Typical OB Alternatives |
|---|---|---|
| CAS Number | 3333-62-8 | Varies by type |
| Molecular Formula | C28H18N2O2S | Different structures |
| Appearance | Yellow-green crystalline powder | White/yellow powders |
| Melting Point | 220-225°C | 180-210°C |
| Thermal Stability | Excellent (up to 300°C) | Moderate |
| Solubility | 0.1g/L in water (20°C) | Similar or lower |
2. Key Industrial Applications
Primary Use Cases:
- Plastic Manufacturing: Enhances whiteness in PVC, PP, PE (0.01-0.05% loading)
- Coatings Industry: UV-resistant brightening for automotive paints
- Textile Processing: Cotton/polyester blend whitening (0.2-0.8% owf)
- Ink Formulations: Offsets substrate yellowness in printing
3. Performance Comparison with Alternatives
| Brightener Type | Whiteness Index | Lightfastness | Chemical Resistance |
|---|---|---|---|
| 236 (CAS 3333-62-8) | 98.5 | Class 7-8 | Excellent |
| OB-1 | 95.2 | Class 5 | Good |
| 127 | 96.8 | Class 6 | Moderate |
4. Usage Guidelines & Best Practices
Optimal Processing Parameters:
- Melt Processing: 200-280°C (30-90 sec residence time)
- Solution Application: 40-60°C dispersion
- Storage: Keep sealed at <30°C/65% RH
5. Verified Customer Success Stories
Case 1: Automotive Plastic Components
- Client: Top 3 German auto parts supplier
- Challenge: Yellowing under UV exposure
- Solution: 0.03% 236 in PP composites
- Result: ΔE reduction from 5.2 to 0.8
Case 2: High-End Packaging Films
- Client: Japanese film manufacturer
- Requirement: FDA-compliant whitening
- Implementation: 236 masterbatch at 1:1000 ratio
- Outcome: 15% reduction in TiO2 usage
6. Request Customized Technical Support
Contact our optical brightener specialists:
- Email: info@vivalr.com
- Phone: (86) 15866781826
Request free sample testing or application-specific formulation guidance.
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