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Estimated delivery time: 3-5 days

Reactive Blue 19 (CAS 2580-78-1) User Guide: Applications, Usage & Best Practices

Table of Contents

1. Product Overview

Reactive Blue 19 Technical Specifications

  • CAS Number: 2580-78-1
  • Molecular Formula: C22H16ClN7O11S3·2Na
  • Molecular Weight: 766.08 g/mol
  • Appearance: Dark blue powder
  • Solubility: Soluble in water (80 g/L at 25°C)
  • Storage: Keep in dry, cool conditions (15-25°C)
  • Shelf Life: 24 months in original packaging

2. Key Applications of Reactive Blue 19

Reactive Blue 19 is a high-performance vinyl sulfone reactive dye specifically engineered for:

  • Textile dyeing of cellulose fibers (cotton, linen, rayon)
  • Printing applications on natural fabrics
  • Leather coloration processes
  • Paper industry applications

Performance Advantages:

  • Excellent wash-fastness (Grade 4-5 ISO 105-C06)
  • High fixation rate (75-85%)
  • Low electrolyte requirement
  • ECO-Passport certified (Oeko-Tex Standard 100)

3. Step-by-Step Usage Guidelines

Standard Dyeing Procedure:

  1. Dye Dissolution: Prepare 5% stock solution at 40-50°C
  2. Dye Bath Preparation:
    • Liquor ratio: 1:10 to 1:20
    • pH: 11-12 (using sodium carbonate)
    • Temperature: 60°C initial, 80°C fixation
  3. Fixation Process: Maintain 30-45 minutes at 80°C
  4. Post-Treatment: Rinse with cold water and soap wash

Safety Precautions:

  • Use PPE (gloves, goggles, respirator)
  • Ensure proper ventilation
  • Follow local chemical disposal regulations

4. Real-World Case Studies

Case Study 1: Cotton Towel Manufacturing

Challenge: Achieve colorfastness in luxury hotel linens
Solution: 2% Reactive Blue 19 with double salt reduction method
Result: Wash-fastness improved from Grade 3 to Grade 4+

Case Study 2: Denim Fabric Production

Challenge: Reduce water consumption in indigo blending
Solution: Reactive Blue 19 cold pad-batch application
Result: 40% water savings with ΔE < 1.5 color consistency

5. Contact Information

For technical support or bulk orders:
Email: info@vivalr.com
Tel: (86) 15866781826
Available: Mon-Fri 8:00-17:00 (GMT+8)

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This is William, CEO of Zhishang Chemical Co., Ltd.

Welcome to visit our factory . As the top chemical manufacturer, we have been striving for product quality, innovation , R&D, and customer service for the past 7 years. In the next 10 years or even longer, we are committed to becoming the most reliable chemical supplier in the world , creating a well-known international brand trusted by customers, with the spirit of “one meter wide, ten thousand meters deep”, we continue to focus on product research and development, continue to focus on customer service, continue to improve the supply chain service system, to create a professional chemical supply service team, to achieve win-win long-term cooperation. Please feel free to contact us if you have any questions.

About the company

Vivalr, a paragon of innovation in the chemical sector, fuses cutting - edge R & D with unwavering commitment to quality. Our product spectrum, from industrial stalwarts to fine - tuned chemicals, is a testament to our versatility.

Drug impurities to intermediates. Years of expertise.

Experience in the synthesis of complex compounds derived from American technology
Focus on the synthesis of difficult compounds
ISO 17034 dual system certification
National high-tech enterprise
2000 square R&D center
More than 20 research and development personnel,
12 sets of research and development equipment, 10 fume hoods and 6 university laboratories have been developed in cooperation
18 patents, 140 sets of chemical synthesis processes

Solid QMS. Offer top-quality products and services.

Through more than ten years of continuous technological innovation and experience accumulation, the team's R&D personnel have established a complete quality management system for CATO, and have successively obtained ISO9001, ISO17034, CNAS and other international certifications.
For the United States, Australia, Japan, South Korea, Sweden, France, Spain and other global more than 2000 customers to provide high-quality products and services, has won the recognition and trust of customers in the industry.

More than 12 sets of equipment to ensure quality.

The emphasis on quality is the basis for our survival and development, and is the most basic requirement for the products and services we provide. CATO has established a scientific, strict and comprehensive quality prevention and assurance system in accordance with international quality standards. Through advanced testing equipment such as GC-MS, chromatograph, nuclear magnetic resonance, scanning electron microscope, and ultraviolet light, quality management is implemented into every aspect of production and operation activities such as raw materials, inventory, production, testing, sales, verification, and training, and "All actions are controlled and traceable" as the work code of conduct for CATO employees.

Over 1000 cases. Synthesize complex compounds.

Currently, CATO serves more than 500 pharmaceutical companies, biotechnology and other companies around the world. Project types cover the entire cycle from pre-clinical to commercialization stages. As of 2020, CATO has delivered more than 1,000 projects in total.
The company has core technologies in key core technology fields such as high-end fluorine chemistry, asymmetric chiral synthesis, glycoside and biological enzyme technology, and continuous microreactors.

Mode of Transportation

By Air, fast but expensive.

By Sea, usual and economy.

By Train, suit for middle Asia countries.

FAQ

Does it support auditing?

Environmental Protection Science and Technology Park, Zhengfeng Road, High-tech Zone, Jinan City, Shandong Province

Whether to provide samples?

Free samples can be provided, and customers only need to pay the corresponding shipping costs

Delivery time

There are stock in the warehouse, and some products need to be customized for production within 3 working days, depending on the workshop situation and production schedule

What payment methods and currencies are accepted here?

We accept payment methods such as TT, Western Union, and letter of credit, etc. Meanwhile, we support currencies like US dollars, euros, RMB, and Bitcoin, etc.

Can additional test indicators be added?

We can provide moisture, UV, IR, HNMR, CNMR, two-dimensional nuclear magnetic spectroscopy, optical rotation detection, elemental analysis, TGA analysis and residue analysis and other related tests to support personalized needs.

Technical direction

In the early stage, our company mainly engaged in drug impurity synthesis and standard product production, with core technologies in chirality, fluorine chemistry, and heterocycles.

Why Vivalr’s delivery rate is guaranteed to be 99.99%

2000+

square meter R&D center

12+

China(set) of R&D equipment

10+

Fume hood

20+

R&D team

User’evaluation of us

"vivalr is my partner for years. Met at 2014 Shanghai CPHI Expo. Not interested then as had stable supplier. In Sep 2016, original supplier couldn't guarantee quality and delivery. Thought of Zhai and his company first. So far, have stable business relationship and good personal friendship."

Marcus Long

" In years of sourcing from China, first found working with Sincere Chemical great. They help in production, delivery and tech, saving time. When first asking Zhai for optical brightener quote, got detailed one with prices, trade details, company info, R&D and production capacity, packaging and raw material control."

Emma Kung

" Hi, I'm Kim, Zhai's partner. Don't like him much (as he never gives more for my prices, haha), but still write customer feedback. Zhai's emails help me understand product and industry. Satisfied with his work ethic. He provides quotes and helps with work details, so I can focus on other things. He's the best supplier for me."

Lisa Phoenix

" Sincere Chemical team visited our USA factory in the year of 2017. We think highly of cooperation with them. We thanked you for the past excellent orders and best product quality. We also talked about some new products for future orders. We will be still in strategic cooperation in the future and help each other."

Marcus Long

"Sincere Chemical is reliable and professional. Its team is excellent in exporting and service, giving suggestions for our new project. Satisfied with service and product quality. Vendor code: 51465768."

Emma Kung

" We are a pharmaceutical manufacturer in Brazil. Happy to cooperate with Sincere Chemical, especially with Zhai. He is patient and friendly. Satisfied with his 24/7 service. We are not only cooperators but also best friends."

Lisa Phoenix

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