China Factory Direct
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| CAS number | 605-32-3 |
| Product name | 2-HYDROXYANTHRAQUINONE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeReagent 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) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Dyes and Pigments | Preparation of anthraquinone dyes | Oxidation, reduction, and coupling reactions |
| Pharmaceuticals | Synthesis of antibacterial and antitumor agents | Chemical synthesis and structural modification |
| Organic Synthesis | Intermediate for synthesizing other compounds | Hydroxylation and substitution reactions |
| Analytical Chemistry | Redox indicator | Solution preparation and colorimetric reaction |
| Materials Science | Preparation of functional dyes for dye-sensitized solar cells | Dissolution, coating, and photochemical reaction |
| Detection Item | Common Analytical Method | Method Overview |
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| Assay (Purity) | HPLC-UV | Quantifies 2-hydroxyanthraquinone by separation on a reversed-phase column and UV absorbance detection at ~254 nm. |
| Related Substances | HPLC-DAD | Detects and semi-quantifies structurally related impurities (e.g., anthraquinone, 1-hydroxyanthraquinone) using diode array detection. |
| 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 | Sulfated Ash Gravimetry | Determines inorganic residue after controlled charring and sulfuric acid treatment followed by ignition at 700-800 C. |
| Heavy Metals (as Pb) | AAS (Flame or Graphite Furnace) | Quantifies total heavy metals by atomic absorption spectroscopy after acid digestion and matrix matching. |
| Chloride | Ion Chromatography (IC) | Separates and quantifies chloride ions using anion-exchange column and conductivity detection. |
| Sulfate | Turbidimetry | Measures sulfate as barium sulfate precipitate formed upon reaction with barium chloride, quantified by light scattering. |
| Iron | AAS | Determines iron content by atomic absorption spectroscopy after sample dissolution and reduction to Fe(II). |
| Water Content | Karl Fischer Titration | Quantifies water via coulometric or volumetric titration using iodine-based reagent reacting stoichiometrically with water. |
| Melting Point | Capillary Melting Point Apparatus | Determines temperature range at which solid transitions to liquid, indicating purity and identity. |
| Organic Volatile Impurities | GC-FID | Identifies and quantifies residual solvents (e.g., toluene, DMF) using gas chromatography with flame ionization detection. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution of solid particles in suspension by analyzing angular variation of scattered laser light. |
| Test Item | Specification |
|---|---|
| Appearance | Yellow-green solid |
| Purity | >=98.0% (HPLC) |
| Melting Point | 235–240 °C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 ppm |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
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.