3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 89-36-1 |
| Product name | 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one |
| 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) |
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Documents We Provide for 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Used as an intermediate for azo dyes and pigments, particularly in the synthesis of acid dyes and direct dyes | Coupled with diazonium salts via diazotization-coupling reactions to produce colored azo compounds |
| Pharmaceutical Industry | Employed as a synthetic intermediate in the preparation of certain antipyretic-analgesic or anti-inflammatory compounds | Participates in condensation, alkylation, or other organic synthesis reactions to construct active molecular frameworks |
| Analytical Chemistry | Used as a colorimetric reagent for spectrophotometric analysis of metal ions (e.g., copper, iron) | Forms colored complexes with target metal ions, enabling concentration determination by spectrophotometry |
| Photographic Industry (Historical Use) | Formerly used as a component of color developing agents | Participates in redox reactions within alkaline developing solutions to generate dye images (now rarely used) |
Manufacturing Quality Control of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
| Test Item | Common Testing Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Take an appropriate amount of sample and place it on a white background. Observe under natural light or standard illumination for color, physical state, and presence of impurities. It should appear as a white to off-white crystalline powder. |
| Identification | Infrared Spectroscopy (IR) | Prepare a KBr pellet of the sample and record its infrared absorption spectrum. Compare with the reference spectrum; key characteristic peaks (e.g., sulfonic acid group, pyrazolone ring) should match. |
| Identification | Ultraviolet-Visible Spectrophotometry (UV-Vis) | Dissolve the sample at a defined concentration and measure the maximum absorption wavelength (e.g., approximately 240–260 nm). Compare with the reference standard to confirm consistency. |
| Content Determination | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase C18 column with a mobile phase consisting of methanol-water or acetonitrile-buffer salt solution. Detect using UV detector (e.g., 254 nm). Calculate the main component content by external standard method. The purity is typically required to be ≥98.0%. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Same or optimized chromatographic conditions as in content determination. Quantify impurities using area normalization method or the principal component self-control method with correction factors. Control individual impurity ≤0.5%, total impurities ≤1.0%. |
| Drying Loss | Thermogravimetric Analysis (TGA) or Constant-Temperature Drying at Atmospheric Pressure | Dry the sample at 105°C until constant weight. Calculate the percentage of mass loss, typically required to be ≤1.0%. |
| Residue on Ignition | Gravimetric Method | Ignite the sample at high temperature (approximately 700–800°C), then weigh the residual ash. This assesses inorganic impurities; typically required to be ≤0.1%. |
| pH Value | pH Meter Method | Dissolve the sample at a specified concentration (e.g., 1% w/v) in water. Measure pH using a calibrated pH meter. Typically, the pH should be within the range of 4.0–6.0. |
| Moisture Content | Karl Fischer Titration | Use either the volumetric or coulometric Karl Fischer titration method to accurately determine water content. Typically required to be ≤1.0%. |
| Sulfate/Sulfonic Acid Group Content | Ion Chromatography (IC) or Titration Method | Determine sulfate ions via ion chromatography, or after alkaline fusion, use barium sulfate gravimetry or titration to indirectly quantify sulfate groups. Used to verify structural integrity and purity. |
Technical Specifications of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Melting Point | 162-166°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.3% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 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 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Safety Information of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
| Pictograms |  |
| Signal Word | Danger |
| Safety Data Sheet | |
Packaging of 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
Industrial 3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one 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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