Alizarin Red S Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 130-22-3 |
| Product name | Alizarin Red S |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent GradeIndustrial GradeSpecialty 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 Alizarin Red S
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Alizarin Red S Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Alizarin Red S
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Used as an acid dye for dyeing cotton, silk, wool, and other fibers | Acid dyeing process, typically conducted at pH 2–4 |
| Organic Synthesis | Used as an intermediate in the synthesis of other azo dyes or functional materials | Azotization and diazotization-coupling reactions |
| Biological Research | Used as a cell stain or histochemical staining reagent | Histochemical staining of tissue sections and microscopic examination |
| Chemical Analysis | Used as an indicator in certain acid-base titrations or metal ion detection assays | Colorimetric determination of metal ion concentration |
| Teaching Laboratories | Used in undergraduate chemistry laboratory instruction to demonstrate dye properties | Conventional laboratory-scale dye synthesis and performance testing |
Manufacturing Quality Control of Alizarin Red S
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | UV-Vis Spectrophotometry | Measures absorbance at characteristic wavelength (approx. 520 nm) and calculates concentration using Beer-Lambert law and certified reference standard. |
| Loss on Drying | Gravimetric (Thermogravimetry) | Determines weight loss after drying at 105 C for 2 hours, reflecting moisture and volatile impurities. |
| Residue on Ignition | Gravimetric (Sulfated Ash) | Measures non-volatile inorganic residue after ignition at 600 C following sulfuric acid treatment. |
| Heavy Metals (as Pb) | AAS or ICP-OES | Quantifies total heavy metal content by atomic absorption or emission spectroscopy after acid digestion and chelation. |
| Chloride | Argentometric Titration (Mohr method) | Titrates chloride ions with silver nitrate using potassium chromate indicator; endpoint signaled by brick-red Ag2CrO4 precipitate. |
| Sulfate | Barium Sulfate Gravimetry | Precipitates sulfate as BaSO4 under controlled pH and temperature, then determines mass after ignition. |
| pH of Aqueous Solution | Potentiometric (pH meter) | Measures hydrogen ion activity in a 1% w/v aqueous solution using calibrated glass electrode. |
| Organic Impurities (Related Substances) | HPLC-UV | Separates and quantifies structurally related compounds using reversed-phase column and UV detection at 254/520 nm. |
| Iron (Fe) | Colorimetric (1,10-Phenanthroline) | Forms orange-red complex with Fe2+ under reducing conditions; absorbance measured at 510 nm. |
| Water Content | Karl Fischer Titration | Electrochemically determines water via iodine-sulfur dioxide reaction in methanol-based reagent. |
| Particle Size Distribution | Laser Diffraction | Analyzes scattered laser light intensity pattern to calculate size distribution of dry powder sample. |
| Bulk Density | Graduated Cylinder Method | Measures mass per unit volume of freely settled powder in standardized cylinder under defined tapping conditions. |
Technical Specifications of Alizarin Red S
| Test Item | Specification |
|---|---|
| Appearance | Red crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 235-240°C (decomposes) |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
| Solubility | Soluble in water and ethanol; forms red solution |
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 Alizarin Red S
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| Lot/Batch Number | *Required fields | |
NMR Spectra of Alizarin Red S
Packaging of Alizarin Red S
Industrial Alizarin Red S 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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