p-Naphtholbenzein Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 145-50-6 |
| Product name | p-Naphtholbenzein |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural GradeIndustrial GradeSpecialty GradeReagent Grade |
| Packaging | 25KG/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 p-Naphtholbenzein
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk p-Naphtholbenzein Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of p-Naphtholbenzein
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Used as an intermediate in the synthesis of antihistamine drugs (e.g., diphenhydramine) | Prepared via organic synthesis reactions including reduction and alkylation to construct the target drug molecule |
| Pesticides | Serves as a synthetic precursor for certain insecticides and fungicides | Participates in condensation or substitution reactions to build the active ingredient scaffold |
| Dyes | Used in the synthesis of triphenylmethane dyes | Condenses with aromatic aldehydes or ketones to form chromophore structures |
| Chemical Reagents | Functions as an aromatic amine reagent in organic synthesis | Employed in nucleophilic substitution, diazotization, and other reactions in laboratory settings |
Manufacturing Quality Control of p-Naphtholbenzein
| Test Item | Common Testing Method | Method Description |
|---|---|---|
| Identification | Ultraviolet-Visible Spectrophotometry (UV-Vis) | Qualitative analysis is performed using the characteristic absorption peaks of α-naphthol near 275 nm and 310 nm, confirmed by comparison with standard spectra. |
| Infrared Spectroscopy (IR) | Structural confirmation is achieved by measuring the infrared absorption spectrum and comparing characteristic peaks such as O-H stretching (~3200 cm⁻¹) and aromatic ring skeletal vibrations (~1600, 1500 cm⁻¹) with standard spectra. | |
| Content Determination | High-Performance Liquid Chromatography (HPLC) | A C18 reverse-phase column is used with methanol-water or acetonitrile-water as the mobile phase. The ultraviolet detector (280 nm) is used for detection, and the external standard method is applied for quantitative determination of the main component. |
| Ultraviolet Spectrophotometry (UV) | The absorbance is measured at the maximum absorption wavelength, and the concentration is calculated based on the Beer-Lambert law using a standard curve method. This method is suitable for samples with high purity. | |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Main components and impurities are separated using a gradient elution program. Impurity peaks are detected and quantified to evaluate purity and safety. |
| Residual Solvents | Gas Chromatography (GC) | According to ICH guidelines, headspace sampling-gas chromatography is used to detect residual organic solvents such as methanol, ethanol, and acetone used in the production process. |
| Dry Loss | Thermogravimetric Analysis (TGA) or Oven Method | The sample is dried at a specified temperature (e.g., 105°C) until constant weight is achieved, and the mass loss is measured to assess water and volatile content. |
| Ignition Residue | Sulfuric Acid Ignition Method | The sample is treated with sulfuric acid and then ignited at high temperature. The remaining inorganic residue is weighed to assess inorganic impurity content. |
| Heavy Metals | Atomic Absorption Spectroscopy (AAS) or Inductively Coupled Plasma Mass Spectrometry (ICP-MS) | After sample digestion, the contents of heavy metals such as lead, cadmium, mercury, and arsenic are determined to ensure compliance with pharmaceutical limit requirements. |
| Melting Point | Capsule Melting Point Determination Method | The sample is loaded into a capillary tube and slowly heated in a melting point apparatus. The initial and complete melting temperatures are observed for identification and purity assessment. |
Technical Specifications of p-Naphtholbenzein
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Melting Point | 128-132°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Odor | Characteristic mild aromatic odor |
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 p-Naphtholbenzein
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of p-Naphtholbenzein
Industrial p-Naphtholbenzein 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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