China Factory Direct
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| CAS number | 333338-18-4 |
| Product name | 4-NITROPHENYL PHOSPHATE DISODIUM SALT HEXAHYDRATE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent 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 |
|---|---|---|
| Biochemistry / Molecular Biology | Reagent for alkaline phosphatase (ALP) activity assay | Used as a chromogenic substrate; hydrolyzed by alkaline phosphatase to yield yellow 4-nitrophenol for colorimetric quantification |
| Clinical Diagnostics | Measurement of serum alkaline phosphatase levels in clinical biochemical testing | Enzymatic reaction substrate; enzyme activity assessed via spectrophotometric measurement of product absorbance |
| Research Reagents | Phosphatase activity screening and inhibitor evaluation in laboratory research | Employed as a standard substrate in enzyme kinetic experiments within buffered systems |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reverse-phase HPLC with UV detection at 315 nm, based on peak area comparison against reference standard. |
| Water Content | Karl Fischer Titration | Electrochemical titration measuring water by reaction with iodine and sulfur dioxide in pyridine/methanol medium. |
| Residue on Ignition | Gravimetric Analysis | Heating sample to 700-800 C to combust organic matter; residue weight reflects inorganic ash content. |
| Heavy Metals (as Pb) | ICP-OES | Multi-element quantification of trace metals after acid digestion, using plasma excitation and optical emission detection. |
| Chloride Impurity | Ion Chromatography | Separation and quantification of chloride anions on anion-exchange column with conductivity detection. |
| Sulfate Impurity | Ion Chromatography | Separation and quantification of sulfate anions on anion-exchange column with conductivity detection. |
| pH (1% aqueous solution) | Potentiometric pH Measurement | Measurement of hydrogen ion activity using calibrated glass electrode in aqueous solution. |
| Organic Volatile Impurities | GC-FID | Identification and quantification of residual solvents via gas chromatography with flame ionization detection. |
| Related Substances | HPLC-UV | Detection and quantification of structurally related impurities (e.g., 4-nitrophenol, phosphoric acid derivatives) using gradient HPLC. |
| Sodium Content | Flame Photometry | Quantification of sodium ions based on characteristic emission intensity at 589 nm in oxidizing flame. |
| Appearance | Visual Inspection | Assessment of physical state, color, and clarity of solid or solution under controlled lighting conditions. |
| Solubility | Qualitative Solubility Test | Observation of complete dissolution in specified solvent (e.g., water) within defined time and temperature conditions. |
| Test Item | Specification |
|---|---|
| Appearance | Pale-yellow solid |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 ppm |
| Melting Point | 245-250 °C |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
| Pictograms | ![]() |
| Signal Word | Danger |
| Safety Data Sheet | |
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.