Indigo Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 482-89-3 |
| Product name | Indigo |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeIndustrial 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 Indigo
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Indigo Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Indigo
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Indigo is a natural dye used for textile dyeing | Extracted from plants or prepared via chemical synthesis |
| Textile Industry | Used as a blue dye for dyeing cellulosic fibers such as cotton and linen | Dyeing performed via reduction dissolution followed by oxidation fixation |
| Chemical Industry | Used as an organic synthesis intermediate | Synthesized via reduction and cyclization of isatin |
| Pharmaceutical Industry | Used in the synthesis of certain pharmaceuticals and bioactive compounds | Employed as a synthetic intermediate in multi-step organic synthesis reactions |
| Printing Ink | Used in the manufacture of inks with specific color properties | Incorporated into ink formulations through mixing with resins and other pigments |
Manufacturing Quality Control of Indigo
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance and Color | Visual Inspection / Colorimeter Method | Evaluate color purity and uniformity by visual observation or using a colorimeter to measure the color difference between the sample and a standard reference. |
| Content Assay | Ultraviolet-Visible Spectrophotometry (UV-Vis) | Quantify concentration based on the characteristic absorption peak of indigo at a specific wavelength (e.g., around 610 nm) using a calibration curve. |
| Purity Analysis | High-Performance Liquid Chromatography (HPLC) | Separate components in the sample and perform qualitative and quantitative analysis of indigo based on retention time and peak area, assessing impurity levels. |
| Moisture Content | Loss on Drying / Karl Fischer Titration | Loss on drying: measure mass loss after drying to constant weight at a specified temperature; Karl Fischer method: specifically used for trace moisture determination. |
| Insoluble Matter | Filtration and Gravimetric Method | Dissolve the sample, filter the insoluble residue, dry and weigh it, then calculate the percentage of insoluble matter. |
| Impurity Limits | Thin-Layer Chromatography (TLC) | Spot the sample on a TLC plate, develop with solvent, and detect specific impurities through visualization to estimate their presence and approximate quantity. |
| Heavy Metal Content | Atomic Absorption Spectroscopy (AAS) or ICP-MS | Digest the sample and measure the content of heavy metals such as lead, cadmium, mercury, and arsenic to ensure compliance with safety standards. |
| Crystal Form Analysis | X-Ray Diffraction (XRD) | Analyze the crystalline structure of indigo to determine its polymorphic form, useful for distinguishing different forms or batch consistency. |
| Particle Size Distribution | Laser Particle Size Analysis | Measure the particle size distribution of indigo powder, which affects solubility and application performance (e.g., dyeing uniformity). |
| pH Value | pH Meter Method | Measure the pH of an aqueous suspension or solution of indigo using a pH meter to assess its chemical stability and suitability for use. |
Technical Specifications of Indigo
| Test Item | Specification |
|---|---|
| Appearance | Dark blue crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 190-193°C |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.3% |
| Heavy Metals | <=20 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 Indigo
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Indigo
Packaging of Indigo
Industrial Indigo 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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