China Factory Direct
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| CAS number | 5610-64-0 |
| Product name | ACID BLACK 52 |
| 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) |
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 |
|---|---|---|
| Dye Industry | Used as a component of acid dyes for dyeing protein fibers such as wool and silk | Dyeing is carried out under acidic conditions, enabling coloration through direct adsorption and fixation onto the fiber |
| Leather Industry | Used for leather dyeing to enhance color depth and uniformity | Leather is treated via immersion or spray application in an acidic medium to ensure dye penetration and strong adhesion to the leather surface |
| Textile Industry | Used for dyeing synthetic fibers and blended fabrics | Dyeing is performed under high-temperature, high-pressure or atmospheric conditions to ensure uniform dye distribution and good fastness in the fibers |
| Detection Item | Common Analytical Method | Method Overview |
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| Assay (Purity) | UV-Vis Spectrophotometry | Quantitative determination based on absorbance at characteristic wavelength using Beer-Lambert law with reference standard. |
| Moisture Content | Karl Fischer Titration | Volumetric or coulometric titration measuring water content via iodine-sulfur dioxide reaction in anhydrous methanol medium. |
| Ash Content | Gravimetric Analysis (Incineration) | Residue mass after high-temperature incineration at 550-600 C, expressed as percentage of original sample. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Quantification of total heavy metals after acid digestion by measuring atomic absorption at element-specific wavelengths. |
| Chloride Content | Potentiometric Titration with AgNO3 | Titration using silver nitrate with silver indicator electrode; endpoint detected by potential change due to AgCl precipitation. |
| Sulfate Content | Gravimetric Analysis (BaSO4 precipitation) | Precipitation as barium sulfate followed by filtration, drying, and weighing of the precipitate. |
| pH of 1% Aqueous Solution | pH Meter Measurement | Electrochemical measurement of hydrogen ion activity in a standardized aqueous dispersion using calibrated pH electrode. |
| Solubility in Water | Visual Inspection and Filtration | Qualitative assessment of complete dissolution in specified volume of distilled water at 25 C, followed by filtration to detect insoluble residue. |
| Organic Impurities (Related Substances) | HPLC with UV Detection | Separation and quantification of structurally related compounds using reversed-phase chromatography and UV absorbance detection. |
| Iron Content | ICP-OES | Multi-element quantification after microwave-assisted acid digestion using inductively coupled plasma optical emission spectroscopy. |
| Bulk Density | Graduated Cylinder Method | Mass per unit volume measured by gently pouring sample into calibrated cylinder and recording settled volume. |
| Particle Size Distribution | Laser Diffraction | Analysis of scattered laser light intensity pattern to determine size distribution based on Mie or Fraunhofer theory. |
| Test Item | Specification |
|---|---|
| Appearance | Black crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.2% |
| Single Impurity | <=0.3% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
| Solubility | Freely soluble in water; slightly soluble in ethanol |
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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.