Direct Blue 71 | 4399-55-7

Description :

Direct Blue 71 Supplier & Distributor In India

Chemical Bull is a Direct Blue 71 supplier, distributor, and exporter in India, supporting sourcing enquiries from textile dyeing units, paper manufacturers, leather processors, colourant companies, distributors, wholesalers, and global B2B buyers.

Direct Blue 71, CAS 4399-55-7, is a water-soluble direct azo dye identified by Colour Index number 34140. It is used for blue coloration of suitable textile, paper, and leather substrates. Buyers can request shade specifications, colour strength, COA, TDS, MSDS or SDS, and bulk pricing.

Overview of Direct Blue 71

Direct Blue 71 is also known as C.I. Direct Blue 71 or C.I. 34140. It belongs to the trisazo dye class, meaning its molecular structure contains three azo linkages.

The dye’s tetrasodium salt has the molecular formula C40H23N7Na4O13S4 and a molecular weight of approximately 1029.87 g/mol. Commercial industrial grades are commonly supplied as blue powder for aqueous dyeing applications.

Commercial products may contain standardising salts or other formulation constituents. Dye content, relative colour strength, and chemical purity are different measurements. Buyers should compare the offered material against an approved shade standard and the relevant analytical methods.

Applications of Direct Blue 71

Cotton & Cellulosic Textile Dyeing

Direct Blue 71 is used to colour cotton and other suitable cellulosic materials, including viscose, linen, and jute. Dyeing units should evaluate shade, levelness, exhaustion, and fastness on the actual fabric before approving a grade.

Paper & Pulp Colouring

Paper manufacturers use suitable Direct Blue 71 grades for blue coloration of pulp and selected paper products. Buyers should assess colour strength, retention, bleeding, and compatibility with the furnish and process additives.

Leather Colouring

Direct Blue 71 has documented leather-colouring applications. Leather processors should confirm suitability for the specific tanning system and evaluate penetration, shade uniformity, rub fastness, and compatibility with finishing treatments.

Laboratory Protein & Membrane Staining

Appropriate laboratory grades have been used to stain proteins immobilised on membranes and tissue sections transferred to PVDF. Industrial dye specifications do not automatically establish suitability for analytical staining; laboratories should select a grade validated for their method.

Direct Blue 71 Shade & Performance Requirements

Finished colour depends on the substrate, dye concentration, water quality, process conditions, and any after-treatment. A powder’s appearance alone does not establish its shade on fabric, paper, or leather.

Request a colour-strength comparison against your approved reference. Confirm the test substrate and method used for washing, light, rubbing, or bleeding performance. Fastness ratings should be evaluated for the offered grade and intended application.

Specifications To Check Before Buying Direct Blue 71

Buyers should confirm CAS 4399-55-7, Colour Index number 34140, physical form, shade, relative colour strength, dye content where specified, moisture, water-insoluble matter, and dissolution behaviour.

Additional requirements may include solution pH with its test concentration, salt content, dust characteristics, and relevant restricted-substance limits. Specify any customer-required heavy-metal or aromatic-amine testing rather than assuming compliance from the product name.

Direct Blue 71 Price & Bulk Supply Support

Direct Blue 71 price depends on colour strength, shade specification, grade, source, quantity, packaging, freight, and delivery destination. Share your approved reference and monthly consumption for a quotation suited to repeat production.

Chemical Bull supports specification reviews, packing enquiries, technical-document requests, domestic dispatch planning, and export coordination. Buyers can request COA, TDS, MSDS or SDS, and shipment documentation for the offered grade. Availability, lead time, and commercial terms are confirmed during quotation.

Direct Blue 71 MSDS & Handling

Chemical Bull provides Direct Blue 71 MSDS or SDS on request for the offered grade. Avoid ingestion, inhalation of dye dust, and direct skin or eye contact. Use suitable dust extraction, protective gloves, safety goggles, and protective clothing according to the SDS and workplace assessment.

Store in tightly closed containers in a cool, dry area, protected from moisture and contamination. Follow the supplied compatibility instructions. Collect spills without spreading dust and manage dye-containing wastewater through the appropriate treatment system.

Related Products

Buyers sourcing Direct Blue 71 may also enquire about dye-manufacturing intermediates from Chemical Bull.

• Sulfanilic Acid
  
  
• N-Benzoyl H Acid

Request a Quote for Direct Blue 71

Need Direct Blue 71 for textile dyeing, paper colouring, or leather processing?

Send your required quantity, approved shade reference, colour-strength requirement, substrate, fastness specifications, packing requirements, and delivery location. Chemical Bull will discuss suitable specifications, availability, bulk pricing, and documentation.

Contact Chemical Bull for a Direct Blue 71 Bulk Supply Quote

Frequently Asked Questions

1. What is Direct Blue 71?

   Direct Blue 71 is a water-soluble trisazo direct dye used for blue coloration of suitable textile, paper, and leather substrates.

   
   

2. What are the CAS number and Colour Index number of Direct Blue 71?

   Its CAS number is 4399-55-7, and its Colour Index number is 34140. The tetrasodium salt has the molecular formula C40H23N7Na4O13S4.

   
   

3. Is Direct Blue 71 suitable for cotton dyeing?

   Yes. It is used for cotton and other suitable cellulosic substrates. Confirm shade, colour strength, levelness, and required fastness on your actual material before production approval.

   
   

4. Who supplies Direct Blue 71 in India?

   Chemical Bull supports Direct Blue 71 supply enquiries in India for textile dyeing units, paper manufacturers, leather processors, distributors, and bulk buyers.

   
   

5. Can I request Direct Blue 71 bulk pricing and MSDS?

   Yes. Share your quantity, shade standard, colour-strength requirement, application, packing requirements, and delivery location to request pricing, availability, COA, TDS, and MSDS or SDS from Chemical Bull.

ChemicalBull supplies Direct Blue 71 across India, serving customers in Andhra Pradesh, Arunachal Pradesh, Assam, Bihar, Chhattisgarh, Goa, Gujarat, Haryana, Himachal Pradesh, Jharkhand, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Manipur, Meghalaya, Mizoram, Nagaland, Odisha, Punjab, Rajasthan, Sikkim, Tamil Nadu, Telangana, Tripura, Uttar Pradesh, Uttarakhand, and West Bengal, as well as the Union Territories of Andaman & Nicobar Islands, Chandigarh, Dadra & Nagar Haveli and Daman & Diu, Delhi, Jammu & Kashmir, Ladakh, Lakshadweep, and Puducherry. We serve pharmaceutical, chemical, research, academic, laboratory, manufacturing, and industrial customers with reliable nationwide delivery.