China Factory Direct
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| CAS number | 557-24-4 |
| Product name | Maleamic acid |
| 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) |
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 |
|---|---|---|
| Pharmaceuticals | Synthesis of drug intermediates, including maleimide derivatives, antibiotics, and vasodilators | Introducing the maleimide moiety via condensation or imidization reactions |
| Agrochemicals | Intermediate for plant growth regulators or fungicides | Chemically conjugated with other bioactive molecules |
| Polymer Industry | Synthesis of N-substituted maleimide monomers for heat-resistant polymers or functional polymers | Used in polymerization or as a comonomer to modify resins |
| Rubber Industry | Intermediate for scorch inhibitors or vulcanization accelerators | Exerts chemical regulation during rubber vulcanization |
| Analytical Testing | Colorimetric reagent or analytical standard for hydrazine compound detection | Forms colored precipitates or derivatives for spectroscopic analysis |
| Detection Item | Common Analytical Method | Method Overview |
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| Assay (Purity) | Acid-Base Titration | Quantifies total acidic functional groups via standardized NaOH titration using phenolphthalein or potentiometric endpoint detection. |
| Moisture Content | Karl Fischer Titration | Measures water content by electrochemical reaction between iodine, sulfur dioxide, and water in a methanol-based reagent. |
| Residual Solvents | Gas Chromatography (GC) | Separates and quantifies volatile organic solvents based on retention time and detector response (e.g., FID). |
| Heavy Metals | ICP-OES | Determines trace metal impurities (e.g., Pb, Cd, Hg) by measuring atomic emission intensities after plasma atomization. |
| Chloride Impurity | Ion Chromatography (IC) | Separates and quantifies chloride ions using anion-exchange column and conductivity detection. |
| Sulfate Impurity | Gravimetric Analysis | Precipitates sulfate as BaSO4 under controlled conditions and determines mass after drying and weighing. |
| Melting Point | Capillary Melting Point Apparatus | Measures temperature range at which solid transitions to liquid, indicating purity and identity. |
| Appearance | Visual Inspection | Assesses physical state, color, and presence of foreign particles against standard reference under controlled lighting. |
| pH (1% aqueous solution) | pH Meter | Measures hydrogen ion activity in aqueous suspension using calibrated glass electrode. |
| Organic Volatile Impurities | Headspace GC-MS | Detects and identifies low-level volatile organic contaminants via headspace sampling coupled with mass spectral identification. |
| Residue on Ignition | Gravimetric Analysis | Determines inorganic ash content by high-temperature incineration followed by precise weighing of residue. |
| Related Substances | HPLC with UV Detection | Separates and quantifies structurally similar impurities using reversed-phase chromatography and UV absorbance at 210–230 nm. |
| Test Item | Specification |
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| Appearance | Pale-yellow solid |
| Purity | >=98.0% (NMR) |
| Water Content (KF) | <=0.5% |
| Melting Point | 132-136°C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Acid Value (mg KOH/g) | 180-195 mg KOH/g |
| Residue on Ignition | <=0.1% |
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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.