Fluorescent Brightener 357 Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 41098-56-0 |
| Product name | Fluorescent Brightener 357 |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeIndustrial GradeCosmetic GradeFood Grade |
| Packaging | 25KG/bag500KG/bag1000KG/bag |
| Sample | Test Samples Available (Click to Request Samples) |
| COA | View COA |
| Price | Get Quote |
| Supply Type | Bulk / Contract manufacturing / OEM |
| Shipping | FCL / LCL available |
| Payment Terms | Support FOB \ CIF \ EXW quotations, and accept Letter of Credit (L/C). |
| Manufacturer | Greenrock Chemical(China Factory) |
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Documents We Provide for Fluorescent Brightener 357
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Fluorescent Brightener 357 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Fluorescent Brightener 357
| Industry | Application | Process |
|---|---|---|
| Textile Industry | Enhances whiteness and brightness of fiber-based products; used in fluorescent whitening treatments for cotton, polyester, nylon, and other fabrics | Added during dyeing and finishing processes such as padding, immersion, and spray application |
| Paper Industry | Increases paper whiteness and improves visual gloss; used in premium printing paper, writing paper, and packaging paper | Fluorescent Whitening Agent 357 is incorporated into the pulp or coating process, acting synergistically with bleaching agents |
| Detergent Industry | Functions as a performance additive to enhance post-wash whiteness and brightness of textiles | Incorporated into liquid or powder detergent formulations to improve visual appearance after cleaning |
| Plastics Processing | Improves the appearance of plastic products; used for whitening transparent or semi-transparent plastics such as polypropylene and polystyrene | Fluorescent Whitening Agent 357 is uniformly dispersed into the resin prior to extrusion or injection molding |
| Inks and Coatings | Enhances whiteness and gloss of inks and coatings, improving visual impact | Used as an additive during ink formulation or paint tinting, suitable for printing and architectural decoration applications |
Manufacturing Quality Control of Fluorescent Brightener 357
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination based on peak area comparison with certified reference standard using reversed-phase chromatography and UV detection at 345 nm. |
| Moisture Content | Karl Fischer Titration | Electrochemical titration measuring water content via reaction of iodine with sulfur dioxide in pyridine/methanol medium. |
| Ash Content | Gravimetric Analysis | Residue mass after incineration at 550-600 C, expressed as percentage of original sample weight. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-OES | Multi-element quantification by measuring atomic emission intensities of plasma-excited elements. |
| Chloride Impurity | Potentiometric Titration | Titration with silver nitrate using silver electrode to detect endpoint via potential change. |
| pH of Aqueous Solution | pH Meter Measurement | Direct measurement of hydrogen ion activity in 1% w/v aqueous dispersion using calibrated pH electrode. |
| Solubility in Water | Visual Inspection and Filtration | Assessment of complete dissolution or presence of undissolved particles in distilled water at 25 C after agitation and standing. |
| Organic Volatile Impurities | GC-FID | Separation and quantification of residual solvents using capillary gas chromatography with flame ionization detection. |
| Colour (APHA) | UV-Vis Spectrophotometry | Measurement of yellowness index via absorbance at 430 nm against platinum-cobalt standard scale. |
| Particle Size Distribution | Laser Diffraction | Analysis of scattered laser light intensity pattern to calculate volume-based particle size distribution. |
| Bulk Density | Weight/Volume Method | Mass of material freely poured into a standardized cylinder divided by its volume. |
| Thermal Stability (Onset Decomposition Temp) | TGA | Measurement of mass loss versus temperature under controlled nitrogen atmosphere to determine decomposition onset. |
Technical Specifications of Fluorescent Brightener 357
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 218-222°C |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.3% |
| Heavy Metals | <=10 ppm |
| Residue on Ignition | <=0.1% |
| Color (APHA/Pt-Co) | <=50 |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
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Download COA of Fluorescent Brightener 357
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of Fluorescent Brightener 357
Industrial Fluorescent Brightener 357 Procurement FAQ
1. How do you ensure product quality consistency?
We rely on a mature China-based manufacturing system and implement strict batch control and quality inspection for every shipment. Our production process complies with ISO 9001 standards, and a COA is provided for each batch to ensure consistent and reliable quality.
2. Do you offer competitive pricing for bulk orders?
Yes, as a China-based manufacturer and bulk supplier, we provide tiered pricing based on order volume. We support FOB and CIF quotations, as well as L/C payment terms for large transactions to meet international trade requirements.
3. Can you support large-volume or long-term supply?
We have stable production capacity and a well-established supply chain, enabling continuous bulk supply. We support ton-level and container-level orders, as well as long-term cooperation projects.
4. What is your typical lead time?
For in-stock products, shipment can be arranged within 1–3 days. For bulk packaging or customized orders, lead time depends on the specific quantity and production schedule.
5. What documents do you provide?
We can provide complete documentation upon request, including COA, SDS, TDS, and other compliance certificates, meeting industrial procurement and export requirements.
6. Can you customize product specifications or packaging?
Yes, we support customization of parameters such as purity, impurities, residual solvents, and heavy metals. We also offer various bulk packaging options, including 25kg bags, drums, and IBC tanks, suitable for industrial applications and transportation.
7. What shipping options do you support?
We support both FCL (Full Container Load) and LCL (Less than Container Load) shipments, and can flexibly arrange logistics solutions based on order size to meet bulk chemical export needs.
8. Do you provide technical or application support?
Yes, we provide basic application guidance and technical support based on industry experience to help customers optimize product usage.
9. How do you handle compliance and export regulations?
We are familiar with international trade and export regulations, ensuring all products comply with relevant requirements. We also provide complete documentation to support smooth customs clearance and global delivery.
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