Indigo Carmine Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 860-22-0 |
| Product name | Indigo Carmine |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material 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 Carmine
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Indigo Carmine Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Indigo Carmine
| Industry | Application | Process |
|---|---|---|
| Textile Dyeing and Printing | Dyeing and printing of cotton, silk, wool, and other fibers | Direct dyeing, mordant dyeing, and preparation of printing pastes |
| Leather Industry | Dyeing leather to impart blue to bluish-violet shades | Immersion dyeing, spray dyeing, or brush dyeing, typically in conjunction with chromium-based mordants |
| Paper Manufacturing | Coloring paper for decorative, packaging, and art applications | Addition of dye solution during size-press application or surface coating |
| Ink Production | Colorant for aqueous inks, suitable for inkjet printing and flexographic printing | Blending with water-soluble resins, humectants, and surfactants |
| Biological Staining | Counterstaining of cell nuclei and acidic components in histology (limited use; alternative dye) | Secondary staining step in standard H&E protocols, using buffer solution at pH 4.0–4.5 |
Manufacturing Quality Control of Indigo Carmine
| Test Item | Common Test Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Place the sample in a transparent container against a white background, and visually examine its color and physical state under natural light or standard illumination to determine if it is a uniform blue powder or granules, free from visible impurities. |
| Active Ingredient Content | Ultraviolet-Visible Spectrophotometry (UV-Vis) | Utilize the characteristic maximum absorption of Acid Blue 74 at a specific wavelength (typically around 580–610 nm). Determine concentration via a calibration curve method and calculate the content of the active ingredient in the sample. |
| Maximum Absorption Wavelength (λmax) | Ultraviolet-Visible Spectrophotometry | Prepare a solution of appropriate concentration and scan the absorbance spectrum between 200–800 nm to identify the wavelength of maximum absorption peak, used to verify consistency of dye molecular structure. |
| pH Value | pH Meter Measurement | Stir a solution of defined concentration (e.g., 1% aqueous solution) of Acid Blue 74 thoroughly, then directly measure its pH using a calibrated pH meter to assess its acidity or alkalinity. |
| Moisture Content | Loss on Drying (LOD) | Weigh a known quantity of sample and dry it in an oven at 105±2°C until constant weight is achieved. Calculate moisture content based on mass loss. Suitable for powdered samples. |
| Water Insolubles | Filtration and Gravimetric Method | Dissolve the sample in hot water, filter through a microporous membrane (e.g., 0.45 μm), dry the residue, and weigh it to calculate the percentage of insoluble matter. |
| Heavy Metal Content | Atomic Absorption Spectroscopy (AAS) or Inductively Coupled Plasma Mass Spectrometry (ICP-MS) | After digestion treatment, detect residual levels of toxic heavy metal elements such as lead, cadmium, chromium, and mercury to ensure compliance with environmental and safety standards. |
| Shade and Color Strength | Dyeing Comparison Method (vs. Standard Sample) | Dye fabric (e.g., wool or nylon) with both the sample and reference standard under identical conditions, then compare shade differences and color strength (K/S value) either visually or using a colorimeter. |
| Uniformity | Spectrophotometry or Dyeing Test | Measure absorbance or dyeing performance from multiple samples taken from different parts of the batch to evaluate color consistency within the same lot. |
| Organic Impurities / Related Substances | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase column (e.g., C18) combined with a UV detector to separate and detect impurity peaks other than the main peak, assessing purity and by-product content. |
Technical Specifications of Indigo Carmine
| Test Item | Specification |
|---|---|
| Appearance | Purple solid |
| Purity | >=98.0% (HPLC) |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
| Melting Point | 210–215 °C |
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 Carmine
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Indigo Carmine
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Industrial Indigo Carmine 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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