Optical brightener OB-1 Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 1533-45-5 |
| Product name | Optical brightener OB-1 |
| 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 Optical brightener OB-1
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Optical brightener OB-1 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Optical brightener OB-1
| Industry | Application | Process |
|---|---|---|
| Textile Industry | Fiber whitening | Added to textiles during dyeing or bleaching |
| Pulp and Paper | Enhancing paper whiteness | Added to pulp for bleaching treatment |
| Detergents | Improving cleaning performance | Formulated into laundry powder or liquid detergents |
| Plastics Processing | Improving whiteness of plastic products | Blended into plastic raw materials during compounding |
Manufacturing Quality Control of Optical brightener OB-1
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantifies OB-1 concentration by UV absorption at 370 nm relative to a certified reference standard using reversed-phase chromatography. |
| Appearance | Visual Inspection | Assesses physical state and color consistency against approved reference sample under controlled lighting conditions. |
| Melting Point | Capillary Melting Point Apparatus | Determines temperature range at which solid OB-1 transitions to liquid, indicating purity and identity. |
| Loss on Drying | Gravimetric (105 C, 2 h) | Measures volatile content by weight loss after drying under standardized temperature and time conditions. |
| Residue on Ignition | Gravimetric (Ash Test) | Quantifies inorganic impurities by measuring residue mass after high-temperature combustion (700-800 C). |
| Heavy Metals (as Pb) | AAS or ICP-OES | Detects total heavy metal content via atomic absorption or optical emission after acid digestion and calibration with lead standard. |
| Chlorinated Benzene Impurities | GC-ECD | Identifies and quantifies residual chlorobenzene solvents using electron capture detection with capillary column separation. |
| Related Substances | HPLC-DAD | Detects and quantifies structurally similar impurities (e.g., mono-chloro, di-chloro derivatives) using diode array detection. |
| Water Content | Karl Fischer Titration | Determines trace water by coulometric or volumetric titration with iodine-based reagent reacting stoichiometrically with H2O. |
| pH of Aqueous Suspension | pH Meter | Measures acidity/basicity of 1% w/v OB-1 suspension in water using calibrated pH electrode. |
| Bulk Density | ASTM D1895 Method A | Determines mass per unit volume of freely settled powder using standardized cylinder and tapping procedure. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution of dry powder via scattering pattern analysis of laser beam passed through dispersed sample. |
Technical Specifications of Optical brightener OB-1
| Test Item | Specification |
|---|---|
| Appearance | Yellow-green solid |
| Purity | >=98.0% |
| Melting Point | 355-358 °C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| Residue on Ignition | <=0.3% |
| Heavy Metals | <=10 ppm |
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 Optical brightener OB-1
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Optical brightener OB-1
Packaging of Optical brightener OB-1
Industrial Optical brightener OB-1 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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