Pamoic acid disodium salt Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 6640-22-8 |
| Product name | Pamoic acid disodium salt |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial 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 Pamoic acid disodium salt
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Pamoic acid disodium salt Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Pamoic acid disodium salt
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Intermediate for synthesizing acid mordant dyes (e.g., Acid Mordant Black T) | Synthesis of dye bases via coupling, condensation, and other chemical reactions |
| Leather Industry | Leather dyeing | Used as a dye precursor in chromium-tanned leather coloring processes |
| Textile Printing & Dyeing | Dyeing of protein fibers (e.g., wool) and polyamide fibers (e.g., nylon) | Mordant dyeing process (requiring chromium mordant treatment) |
Manufacturing Quality Control of Pamoic acid disodium salt
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Take an appropriate amount of sample and place it on a white background, observing its color, condition, and presence of foreign matter under natural light or standard light source. 4,4'-Methylenebis(3-hydroxy-2-naphthoic acid) disodium salt is typically a pale yellow to brownish-yellow powder. |
| Identification | Infrared Spectroscopy (IR) Ultraviolet-Visible Spectroscopy (UV-Vis) |
- IR: Prepare a sample pellet and measure the infrared absorption spectrum, comparing characteristic absorption peaks with standard spectra (e.g., carboxylate sodium, hydroxyl, aromatic rings). - UV-Vis: Prepare a solution of appropriate concentration and measure the maximum absorption peak at specific wavelengths (e.g., around 280–320 nm) to confirm characteristic absorption. |
| Content Determination | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase C18 chromatographic column with a mobile phase of methanol/ACN-buffered saline solution. Detect using a UV detector (e.g., 280 nm or 310 nm), and calculate the main component content using external standard or area normalization method, usually requiring ≥98.0%. |
| Dry Loss | Thermogravimetric Analysis (TGA) or Constant-Temperature Drying Method | Dry the sample at 105°C until constant weight, calculate the percentage of mass loss, which is used to evaluate moisture and volatile impurity content; generally limited to ≤5.0%. |
| Residue on Ignition (Sulfated Ash) | High-Temperature Incineration Method | Caramelize the sample and incinerate it in a high-temperature furnace (700–800°C) until constant weight, weigh the residual inorganic matter, reflecting the total amount of inorganic salts or metal impurities; generally limited to ≤0.5%. |
| pH Value | pH Meter Measurement Method | Prepare a solution of certain concentration (e.g., 1% w/v) in water, and use a calibrated pH meter to measure the pH value, generally ranging from 7.0–9.0. |
| Heavy Metals | Atomic Absorption Spectrometry (AAS) or Inductively Coupled Plasma Mass Spectrometry (ICP-MS) | After digestion of the sample, use AAS or ICP-MS to determine the content of heavy metals such as lead, arsenic, cadmium, and mercury; the total heavy metal limit is generally ≤20 ppm. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Use gradient elution HPLC conditions to separate and detect possible synthetic by-products, degradation products, etc. Impurities are generally limited to ≤0.5% individually and ≤1.0% in total. |
| Insoluble Matter in Water | Filtration-Drying Weighing Method | Dissolve the sample in a specified volume of water, filter out insoluble matter, dry it, and weigh it to calculate the percentage of insoluble matter, generally limited to ≤0.1%. |
Technical Specifications of Pamoic acid disodium salt
| Test Item | Specification |
|---|---|
| Appearance | Light Yellow Crystal Powder |
| Purity | >=98.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Melting Point | 245–250 °C (decomposes) |
| Residue on Ignition | <=0.3% |
| Heavy Metals | <=20 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 Pamoic acid disodium salt
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NMR Spectra of Pamoic acid disodium salt
Packaging of Pamoic acid disodium salt
Industrial Pamoic acid disodium salt 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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