UV absorber-928 Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 73936-91-1 |
| Product name | UV absorber-928 |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeIndustrial 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 UV absorber-928
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk UV absorber-928 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of UV absorber-928
| Industry | Application | Process |
|---|---|---|
| Plastics Industry | Enhancing weather resistance of plastic products | Directly incorporated into resins during processing of polyolefins, polycarbonates, polyesters, etc., via extrusion or injection molding to prevent UV-induced degradation and discoloration |
| Coatings Industry | Improving UV aging resistance of coatings | Incorporated into solvent-based or water-based coating formulations; forms a protective film upon application that effectively absorbs UV radiation, thereby retarding chalking, cracking, and fading |
| Adhesives and Sealants | Improving durability of outdoor adhesives | Blended with other additives during production of construction sealants, automotive adhesives, and similar products to enhance material stability under prolonged solar exposure |
| Synthetic Fibers | Preventing fiber yellowing and tensile strength loss | Added to the polymer melt prior to spinning for manufacturing synthetic fibers—such as polyester fabrics for outdoor applications—that require long-term exposure to sunlight |
| Fine Chemicals | Used as a component in photostabilizer blends | Used synergistically with other photostabilizers (e.g., hindered amine light stabilizers, HALS) in various polymer systems to enhance overall UV resistance |
Manufacturing Quality Control of UV absorber-928
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reverse-phase HPLC with UV detection at 340 nm, based on peak area comparison against a certified reference standard. |
| Appearance | Visual Inspection | Assessment of physical state and color under controlled lighting against established visual standards for crystalline solid. |
| Melting Point | Capillary Melting Point Apparatus | Determination of temperature range at which solid transitions to liquid, using calibrated capillary apparatus per USP <741>. |
| Loss on Drying | Gravimetric (105 C, 2 h) | Measurement of mass loss after drying under specified temperature and time to assess volatile content including residual solvents and moisture. |
| Residue on Ignition | Gravimetric (Sulfated Ash) | Determination of non-volatile inorganic residue after high-temperature ignition following sulfuric acid treatment. |
| Heavy Metals | AAS (Lead, Cadmium, Mercury, Arsenic) | Quantification of individual toxic elements by atomic absorption spectroscopy after acid digestion and matrix matching. |
| Chlorinated Impurities | GC-ECD | Detection and quantification of chlorinated organic impurities using gas chromatography with electron capture detection. |
| Related Substances | HPLC-DAD | Identification and quantification of structurally related impurities using HPLC with diode array detection and spectral library matching. |
| Water Content | Karl Fischer Titration | Volumetric or coulometric titration with iodine-based reagent to determine trace water content based on stoichiometric reaction. |
| pH of Aqueous Suspension | pH Meter | Measurement of pH in a defined aqueous suspension (e.g., 1% w/v) using calibrated pH electrode per EP 2.2.3. |
| Particle Size Distribution | Laser Diffraction | Analysis of particle size distribution in dispersed phase using Mie scattering theory and standardized dispersion protocol. |
| Solvent Residues | GC-FID | Quantification of residual manufacturing solvents (e.g., toluene, methanol) using gas chromatography with flame ionization detection. |
Technical Specifications of UV absorber-928
| Test Item | Specification |
|---|---|
| Appearance | Pale-yellow solid |
| Purity | >=98.0% (GC-MS) |
| Water Content (KF) | <=0.5% |
| Melting Point | 142–146°C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=10 ppm |
| Residue on Ignition | <=0.1% |
| Color (APHA/Pt-Co) | <=100 |
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 UV absorber-928
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of UV absorber-928
Packaging of UV absorber-928
Industrial UV absorber-928 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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