6-Amino-4-hydroxy-2-naphthalenesulfonic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 90-51-7 |
| Product name | 6-Amino-4-hydroxy-2-naphthalenesulfonic acid |
| 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 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 6-Amino-4-hydroxy-2-naphthalenesulfonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Used as an intermediate for azo dyes and pigments, particularly in the synthesis of acid dyes, direct dyes, and reactive dyes | Reacted with other aromatic amines or phenolic compounds via diazotization-coupling to form target dye molecules |
| Analytical Chemistry | Employed as a colorimetric reagent for metal ions (e.g., iron, copper, aluminum) | Forms colored complexes with metal ions under specified pH conditions; concentrations are determined by spectrophotometry |
| Pharmaceutical Industry | Serves as an intermediate in the synthesis of certain pharmaceuticals | Participates in constructing naphthalene-ring-containing active pharmaceutical ingredients, incorporated into target molecules via multistep organic synthesis |
| Photographic Industry | Used as a component of photographic developing agents | Reduces silver salts to metallic silver in alkaline developer solutions, facilitating image formation |
Manufacturing Quality Control of 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the color and condition of the sample (usually light yellow to brownish-yellow crystals or powder) with the naked eye to determine if it meets the standard requirements. |
| Identification Test | Infrared Spectroscopy (IR) Ultraviolet-Visible Spectrophotometry (UV-Vis) |
IR: Measure the infrared absorption spectrum of the sample and compare it with the standard spectrum to confirm its structure; UV-Vis: Measure the maximum absorption peak at a specific wavelength (e.g., around 320–340 nm) to verify characteristic absorption. |
| Content Determination | High-Performance Liquid Chromatography (HPLC) Acid-Base Titration |
HPLC: Use a C18 reversed-phase chromatography column, with methanol/water or acetonitrile/buffer salt as the mobile phase, and a UV detector (e.g., 254 nm or 330 nm) to quantify the main component content; Acid-Base Titration: Utilize its weak acidity, titrate with a standard base solution (e.g., NaOH), and calculate the content of the active ingredient. |
| Dry Loss | Drying Loss Method | Place the sample in a constant temperature drying oven at 105°C until it reaches constant weight, measure the percentage of mass loss, and assess the moisture and volatile matter content. |
| Residue on Ignition (Ash Content) | High-Temperature Combustion Method | After carbonization, incinerate the sample in a muffle furnace at 700–800°C until reaching constant weight, weigh the residual inorganic material, and evaluate the level of inorganic impurities. |
| Heavy Metals | Thioacetamide Colorimetric Method Atomic Absorption Spectrometry (AAS) |
Thioacetamide Method: React under acidic conditions with thioacetamide to produce a colored precipitate, and compare it with a standard lead solution by colorimetry; AAS: Directly measure the content of heavy metals such as lead, cadmium, and mercury with high sensitivity. |
| pH Value | pH Meter Measurement | Prepare a solution of a certain concentration (e.g., 1% w/v) in water, and use a calibrated pH meter to measure the acidity or alkalinity to assess free acid or basic impurities. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Use gradient elution or isocratic elution HPLC conditions to separate and detect possible synthetic byproducts or degraded impurities (e.g., unreacted raw materials, oxidation products), and calculate the impurity content using area normalization or reference substance methods. |
Technical Specifications of 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
| Test Item | Specification |
|---|---|
| Appearance | Off-white to light brown crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 235–240 °C (decomposes) |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
| Solubility | Soluble in water with slight yellow color; soluble in dilute NaOH |
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 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
Safety Information of 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
| Pictograms |  |
| Signal Word | Danger |
| Safety Data Sheet | |
Packaging of 6-Amino-4-hydroxy-2-naphthalenesulfonic acid
Industrial 6-Amino-4-hydroxy-2-naphthalenesulfonic acid 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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