Production
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Solvent Red 207
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PET Color Masterbatch
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Pigment orange 34
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Optical Brightener CXT
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Ultramarine blue
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PET Optical Brightener OB-1 masterbatch
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Solvent Blue 45
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Solvent Orange 105
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Pigment yellow 14
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Sodium Alpha-olefin Sulfonate
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Solvent Orange 60
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Solvent Red 135
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Pigment red 170 F3RK
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Optical Brightener SWN
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Solvent Red 149
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Optical Brightener ER-II
Optical Brightener ER-I
Product Name: Optical Brightener ER-I / Fluorescent Brightener 199
Chemical Name:
4,4′-(1,4-Phenylenebis(ethene-2,1-diyl))dibenzonitrile / 1,4-Bis(4-cyanostyryl)benzene
Color Index: C.I. 199
CAS: 13001-39-3
Molecular Formula: C₂₄H₁₆N₂
Formula Weight: 332.40 g/mol
Synonyms: Fluorescent Brightener 199; FBA 199; Optical Brightening Agent ER-I; 1,4-Bis(4-cyanostyryl)benzene; 4,4′-(1,4-Phenylenediethene-2,1-diyl)dibenzonitrile; Blankophor ER; C.I. 199
Application:
Polyester Fibers (PET), Polyamide Fibers (Nylon), Acetate Fibers, Textile Blends (Polyester-Cotton, Polyester-Wool), Plastics (PE, PP, PVC), Coatings & Paints, Injection Molding, Extrusion Molding
Description
marker
1.Product Description
Achieve Exceptional Whiteness with Optical Brightener ER-I – The Industry Standard for Polyester and High-Temperature Applications.
Optical Brightener ER-I, internationally designated as Fluorescent Brightener 199 (C.I. 199), is a premium bisdiphenylethylene derivative that represents the gold standard for whitening polyester fibers and high-performance plastics . This sophisticated non-ionic brightener features a unique distyrylbenzene molecular structure that delivers outstanding thermal stability and exceptional whitening efficacy under demanding processing conditions .
The advanced molecular architecture of ER-I enables superior photophysical performance: it absorbs invisible ultraviolet radiation and re-emits it as brilliant blue-violet visible light, effectively neutralizing the natural yellowish cast of polyester fibers and plastic materials . What truly distinguishes ER-I from conventional brighteners is its exceptional thermal stability, maintaining whitening efficacy at processing temperatures up to 300°C, making it the preferred choice for high-temperature fiber spinning and injection molding applications .
2. Product Specifications (Technical Data Sheet)
| Property | Specification | Insight |
| Product Name | Optical Brightener ER-I (Fluorescent Brightener 199) | Premium bisdiphenylethylene brightener for polyester and plastics |
| Appearance | Yellowish-green to light yellow crystalline powder | Uniform, free-flowing powder with excellent dispersion characteristics |
| CAS No. | 13001-39-3 | Verified chemical registry number |
| EINECS/EC No. | 235-835-1 | Listed in European inventory |
| Molecular Formula | C₂₄H₁₆N₂ | Distyrylbenzene structure |
| Formula Weight | 332.40 g/mol | Precise molecular mass |
| Solubility | Insoluble in water; soluble in most organic solvents (toluene, xylene, chlorobenzene, DMF) | Excellent organic solubility for polymer applications |
| Style | Non-ionic / Bisdiphenylethylene Fluorescent Whitening Agent (FBA) | Compatible with various polymer systems |
| Fluorescence Color | Light purple-blue to bluish | Produces clean, bright white appearance |
| Tinting Strength | High | Exceptional whitening efficacy with minimal dosage |
| Purity | ≥ 99.0% - 99.5% (HPLC) | High purity ensures consistent performance |
| Melting Point | 229-231°C | Excellent thermal stability for high-temperature processing |
| Volatile Content | ≤ 0.5% | Low volatility during processing |
| Ash Content | ≤ 0.1% | High purity with minimal inorganic residues |
| Storage Conditions | Store in cool, dry, ventilated warehouse; avoid sunlight, moisture, and heat | Shelf life: 2-3 years under proper storage |
| Packing | 20 kg cartons / 25-30 kg fiber drums with PE inner liner; custom sizes available | Secure, moisture-proof packaging |
| Application | Polyester fibers, polyamide fibers, PE, PP, PVC, coatings | Versatile across multiple industries |
3.Product Application
Textile Industry – Primary Application:
Optical Brightener ER-I is the preferred whitening agent for polyester and synthetic fibers, delivering exceptional performance across various application methods :
| Fiber Type | Application Method | Recommended Dosage | Processing Conditions |
| Polyester (PET) Fibers | High-temperature dyeing / Spinning | 0.02-0.08% (on weight of fiber) | 240-300°C for drawing-spinning; add during chip mixing |
| Polyester-Cotton Blends | Exhaust dyeing | 0.05-0.15% (o.w.f) | Suitable for one-bath processes |
| Polyester-Wool Blends | Exhaust dyeing | 0.05-0.15% (o.w.f) | Compatible with protein fibers |
| Polyamide (Nylon) Fibers | Exhaust dyeing | 0.05-0.1% (o.w.f) | Effective whitening for synthetic fibers |
| Acetate Fibers | Exhaust dyeing | 0.05-0.1% (o.w.f) | Provides bright, clean whiteness |
Plastics Industry:
ER-I demonstrates outstanding whitening performance across a broad spectrum of thermoplastic polymers.
Coatings & Paints:
ER-I is widely used in coating applications, providing excellent whitening effects in solvent-based systems.
Industrial Coatings: Enhances whiteness and brightness; dosage 0.01-0.05%
Clear Lacquers: Masks yellowing in clear coatings.
Specialty Paints: Provides UV-activated fluorescence effects.
4.Storage
This product may be stored up to two years in a sealed container. Containers should be kept tightly closed when not in use and stored in a cool, dry place.
5.Packaging
Usually is 25Kg/drum or paper box or bag with inner double PE liner Or provide customized packaging according to customer requirements.
6.Our advantage
1) Provide free samples for testing or comparing the effect difference and cost performance.
2) Fast response speed, customers' questions at any time will be responded to in two hours.
3) Fast delivery: the fastest delivery can be made on the same day.
4)Different packaging solutions: provide various packaging options according to customer requirements.
5)Technical guidance: provide improved whitening and coloring formulas and guidance according to customer production materials.
6) Sample retention or sample mailing before bulk delivery.
7) Providing certificationes, such as Reach certification.
8) Different payment methods: TT LC, etc.
9) Providing door-to-door DDP service.
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