Production
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Ultramarine blue
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PET Optical Brightener OB-1 masterbatch
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Phthalocyanine blue 15-1
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Solvent Red 23
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Acid Orange 33
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Rutile Titanium Dioxide
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Solvent Blue 45
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Solvent Red 135
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Solvent Red 195
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Solvent Violet 13
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Sodium Lauryl Ether Sulfate 70% (SLES AES)
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Pigment red 122
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Solvent blue 35
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Acid Red 249
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Pigment red 57-1
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Solvent Yellow 163
Optical Brightener CXT
Product Name: Optical Brightener CXT / Fluorescent Brightener 71
Chemical Name:
Disodium 4,4′-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2′-disulfonate
Color Index: C.I. 71
CAS: 16090-02-1
Molecular Formula: C₄₀H₃₈N₁₂Na₂O₈S₂
Formula Weight: 924.93 g/mol
Synonyms: Fluorescent Brightener 71; FBA 71; Optical Brightening Agent CXT; C.I. 71; Tinopal CXT; Whitening Agent CXT; Stilbene-based Fluorescent Brightener
Application:
Laundry Detergents (Powders, Concentrates), Soaps & Soap Bars, Textile Processing (Cotton, Nylon, Polyamide, Vinylon, Wool), Paper Manufacturing, Bleaching & Dyeing Auxiliaries
Description
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1.Product Description
Achieve Superior Whiteness with Optical Brightener CXT – The High-Performance Whitening Agent for Detergents and Textiles.
Optical Brightener CXT, internationally designated as Fluorescent Brightener 71 (C.I. 71), is a premium stilbene-based fluorescent whitening agent engineered specifically for the detergent and textile industries . This advanced compound incorporates a morpholine group into its molecular structure, delivering enhanced acid resistance and perborate stability that sets it apart from conventional brighteners like VBL and 31#.
The sophisticated molecular architecture of CXT absorbs invisible ultraviolet radiation at approximately 350 nm and re-emits it as brilliant blue-violet visible light, effectively neutralizing the natural yellowish cast of fabrics and imparting a radiant, "whiter-than-white" appearance.
What distinguishes Optical Brightener CXT is its exceptional combination of performance features:
Superior Chlorine Bleach Stability: Demonstrates outstanding resistance to chloride bleaching compared to VBL and 31#, maintaining whitening efficacy even in bleach-containing detergent formulations.
High Matching Capacity: Exhibits excellent compatibility with various detergent components and exceptional accumulated washing whitening effect, making it ideal for diverse detergent formulations.
Broad pH Stability: Performs optimally across a favorable dyeing bath pH range of 7-10, with good sunlight fastness rated at grade 4.
Versatile Fiber Affinity: Effective on cellulose fibers, polyamide (nylon), vinylon, casein fiber, and protein fibers including wool.
Our Optical Brightener CXT is manufactured in accordance with HG/T 3675-2016 quality standards, offering consistent purity, low water insolubles (≤0.5%), and reliable batch-to-batch performance.
2.Product Specifications (Technical Data Sheet)
| Property | Specification | Insight |
| Product Name | Optical Brightener CXT (Fluorescent Brightener 71) | Premium stilbene-based brightener for detergents and textiles |
| Appearance | White to light yellow uniform powder | Free-flowing, odorless powder with excellent dispersion characteristics |
| CAS No. | 16090-02-1 | Verified chemical registry number |
| EINECS/EC No. | 240-245-2 | Listed in European inventory |
| Solubility | Soluble in hot water (forms ~10% solution); less soluble than VBL and 31# in cold water | Prepare solution fresh; avoid sunlight exposure after dissolution |
| Style | Anionic / Stilbene Fluorescent Whitening Agent (FBA) | Anionic character for compatibility with detergent systems |
| Maximum UV Absorption | 350 nm ± 1 nm | Efficient absorption of near-UV radiation |
| E₁₁ (UV Absorption) | ≥ 370 | High absorption efficiency |
| Purity | ≥ 99% | High purity ensures consistent performance |
| Moisture Content | ≤ 5.0% | Low moisture ensures stability and free-flowing properties |
| Water Insolubles | ≤ 0.5% | High purity with minimal residue |
| Sunlight Fastness | Grade 4 | Good resistance to UV exposure |
| Optimal pH Range | 7-10 | Stable performance across alkaline conditions |
| Packing | 20 kg or 25 kg fiber drums / cardboard cartons with PE inner liner; custom sizes available | Secure, moisture-proof packaging to maintain product integrity |
| Storage Conditions | Store in cool, dry, ventilated warehouse; avoid sunlight, moisture, and heat | Shelf life: 2 years under proper storage conditions |
| Application | Laundry detergents, soaps, textile processing, paper | Versatile across multiple industries |
3.Product Application
Detergent & Soap Industry – Primary Application:
Optical Brightener CXT is the preferred whitening agent for the detergent industry due to its high matching capacity and exceptional accumulated washing whitening effect . It is widely used in:
| Application Type | Recommended Dosage | Performance Notes |
| Synthetic Detergents | 0.1-0.5% (1-5 g per kg) | Excellent compatibility with surfactant systems |
| Laundry Powders (Concentrated) | 0.1-0.5% (1-5 g per kg) | Superior accumulated whitening effect across wash cycles |
| Toilet Soaps & Soap Bars | 0.1-0.5% (1-5 g per kg) | Uniform distribution in soap matrices |
| Liquid Detergents | 0.1-0.5% (1-5 g per kg) | Compatible with liquid formulations |
Textile Industry:
CXT delivers outstanding whitening performance across various fiber types:
| Fiber Type | Recommended Dosage | Application Notes |
| Cotton & Cellulose Fibers | 0.1-0.3% (1-3 g per kg) | Excellent whitening effect; superior to VBL and 31# |
| Polyamide (Nylon) | 0.1-0.3% (1-3 g per kg) | Outstanding whitening on artificial fibers |
| Vinylon | 0.1-0.3% (1-3 g per kg) | Good whitening effect on polyvinyl alcohol fibers |
| Wool (Protein Fibers) | 0.1-0.3% (1-3 g per kg) | Effective whitening on animal fibers |
| Casein Fiber | 0.1-0.3% (1-3 g per kg) | Good whitening on protein-based synthetic fibers |
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.
Contact Us
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