PRODUCT
Coomassie blue CAS 3861-73-2
CAS:3861-73-2 | C26H20N3NaO10S3 |MW：653.63 | EINECS NO：223-378-0
Payment: L/C,T/T,D/P,Paypal,Money Gram,Western Union
Incoterm: FOB,CFR,CIF,EXW,FCA,CPT,CIP
Transporta: Ocean, Land,Air, DHL，TNT
Port: Shanghai Port, Qingdao Port
Description
Coomassie Blue is a uniform dark blue powder. When dissolved in water, it turns purple. Addition of concentrated hydrochloric acids turns blue and addition of concentrated sodium hydroxide changes the color to red, orange and brown. Coomassie Blue is insoluble in organic solvents. It is slightly soluble (with a light red color) in ethanol, but not insoluble. The color is dark green when it’s diluted in sulfuric acid, and turns blue in the concentrated form. It becomes purple with concentrated nitric acids and turns orange. Second, solubility can be a key physical property. Coomassie Blue is easily soluble and transparent in water. It is also soluble with polar organic solvents like ethanol. Its aqueous dyeing solution has a stable performance. Coomassie Blue is a stable color, both physically and chemically. The properties of Coomassie blue are stable at room temperature and under pressure. It is not easily decomposed. It is also not volatile and has a low hygroscopicity. In terms of other physical characteristics, Coomassie has a melting point that is similar to the general synthetic dyes. These physical properties determine in practical applications that acid navy R is suitable to dye protein fibers like wool, silk nylon and polyamide fibers.
Product Images & Packaging
Product Parameters
Coomassie blue CAS 3861-73-2
| Melting point | >300°C |
| solubility | Solubility Soluble in water, acetone; slightly soluble in ethanol, glycerol |
| pka | 11.22(at 25℃) |
| Colour Index | 13390 |
| form | powder |
| color | Dark bluish-black |
| PH Range | Blue (11.0) to pink (12.0) |
| λmax | 571nm, 585nm, 580–590nm |
| Merck | 14,628 |
| Major Application | color filter, fuel cells, thin films, inks, markers, lithographic printingplates, textiles, cosmetics, neural network |
The application of Coomassie blue
Coomassie blue, as a classic blue black acid dye, plays an irreplaceable role in multiple industrial fields due to its deep color, good uniformity, important chromatography, and relatively good wet treatment fastness.
1、 Textile dyeing field
Coomassie blue can be used for dyeing wool yarn, sweaters, woolen fabrics, blankets, carpets, and more. It can form ionic bonds with the amino groups on wool fibers and combine with van der Waals forces to dye a pure and full navy blue color.
Coomassie blue is a key component dye for obtaining medium to dark shades of blue, especially black, navy blue, dark gray, and other colors, whether it is spot dyeing or loose hair dyeing. Its dyeing process is mature and usually carried out in acidic dyeing baths.
Coomassie blue can also be used for dyeing silk fabrics and silk products. It has a good affinity for silk, and after dyeing, the fabric feels soft and has an elegant luster, which can showcase the noble texture of silk while providing a deep blue color. PH control is gentler than wool.
It can also be used for coloring various leather products. It combines with the amino groups on leather collagen, has good permeability, can achieve uniform dyeing, and gives leather a classic deep blue appearance.
Polyamide fiber dyeing is an important application area of Coomassie blue in modern textiles. Used for nylon fabrics, nylon stockings, carpet silk, hiking ropes, fishing nets, etc. Nylon fibers contain amino groups at the end, which can bind with dyes.
Coomassie blue has a high saturation value for nylon dyeing, can achieve deep and rich colors, and has excellent wear resistance and certain sun fastness, making it very suitable for textiles that require high strength and durability.
Coomassie blue can color two types of fibers simultaneously. Although there may be slight differences in dyeing speed and hue, good color matching can be achieved through process control, making it a common choice for dyeing dark colors in such blended products.
2、 Material coloring
Coomassie blue can be used as a coloring agent for paper, especially for producing decorative paper of specific colors, gift wrapping paper, or special paper that needs to be dyed. Good water solubility, easy to evenly disperse in pulp, can give paper a bright and lasting blue color. However, due to the fact that Coomassie blue is an anionic dye with low directness to plant fibers, it usually requires the use of mordants or fixatives to improve retention.
Coomassie blue can also be used to manufacture inks, especially some colored inks and marker ink, providing a stable blue color.
3、 As an intermediate color or color blocking component
This is a key application of Coomassie blue in technology. In textile dyeing, it is rare to use a single dye to achieve the desired color.
Pure black acid dyes often lack sufficient blackness or are expensive. In practice, Coomassie blue is often used as the main color, mixed with a small amount of acid yellow and acid red to create a full and deep navy blue or black color.
This color blocked black has a stronger sense of layering and depth than single dye black, and the tone of the black light can be fine tuned by adjusting the proportions.
Superior Coomassie Blue Series | Reliable Quality & Sufficient Supply
≥95% Assay Quality
Manufactured with strict quality standards to ensure reliable staining performance and batch-to-batch consistency.
10+ Tons Annual Production Capacity
Annual production capacity exceeds 10 metric tons, supporting laboratory supply, distributor demand, and bulk procurement projects.
Exported to 46+ Countries
Trusted by customers across North America, Europe, Asia, South America, and other international markets.
Complete Technical Documentation
COA, MSDS, TDS, analytical reports, and customized technical documents are available upon request.
FAQ
Coomassie Blue is primarily used for protein staining, SDS-PAGE gel visualization, protein quantification, and biochemical research applications.
Yes. Coomassie Brilliant Blue R-250 is one of the most commonly used dyes for staining proteins following SDS-PAGE electrophoresis.
Coomassie Blue R-250 is commonly used for gel staining, while Coomassie Blue G-250 is widely used in Bradford protein assays and protein quantification methods.
Yes. Zhishang Bio provides COA, MSDS, and other technical documentation upon request.
Yes. Bulk quantities and customized packaging options are available for distributors, laboratories, and industrial customers worldwide.
Related References
Manufacturer of Coomassie blue
Achievements
Advantage
Service
FAQ
Advice on Shipping
Achievements
Zhishang Bio is based in Shandong, serves the whole country, faces the world, and is determined to become an excellent supplier and service provider in the chemical industry.
As a top manufacturer of cosmetic raw materials, disinfectants, flavors and fragrances in China, we are committed to producing high-quality products and have won high praise from customers all over the world.
In the next 10 years or even longer, Zhishang Bio will always adhere to the tenet of quality first and reputation first, and devote itself to providing customers with thoughtful and perfect services.
As a professional Coomassie blue manufacturer, Zhi shang Bio has served more than 6,000 customers around the world. Because of our high-quality products and professional services, we have won high praise from most of our customers.
Advantage
Zhishang Bio is a professional enterprise engaged in the research and development, production, and sales of chemical raw materials. It has a strong supply chain system and strict quality control standards to ensure the provision of high-quality products with high purity and stability to customers.
Zhishang Bio’s core strength is its independent research and design capabilities. It has advanced production equipment, testing laboratories and can customize chemical raw materials to meet the market demands. This includes pharmaceuticals, electronic, coatings and agricultural applications.
Zhishang Bio’s supply chain management is based on long-term relationships with domestic and international suppliers of high quality to guarantee a stable supply, optimize logistic systems, and achieve efficient distribution. This helps reduce the cost of customer purchases.
We adhere to international environmental standards and we also adhere to the concept that environmental protection and safety production are important. All production processes must comply with these standards in order to guarantee that our products will be green and sustainable.
With a professional technical team and comprehensive after-sales service, Zhishang Bio can provide customers with precise technical support, solve application problems, and help customers enhance product competitiveness.
We are always customer-oriented and committed to becoming a trusted chemical raw material partner.
Service
Zhishang Biography is dedicated to using clients extensive and expert service, including chemical raw material. The customers will certainly receive hassle-free, efficient and one-stop options.
1. Custom-made Supply Solutions
Zhishang Bio provides tailored services for clients in the chemical basic material sector, including special bit dimension, solvent residue control, stability optimizations and more. Clients can personalize their services to satisfy details requirements in industries such as drugs, electronic devices, and finishings.
2. Strict quality assurance
Zhishang Bio utilizes advanced screening equipment and stringent quality examination procedures, in addition to various other files, to guarantee that every batch of products is certified with international criteria such ISO GMP, REACH, and so on. Customers are also given with full quality records and conformity documents.
The supply chain is secure
Zhishang Bio has actually established lasting calculated collaborations with worldwide makers of top notch raw materials to make certain a secure supply, maximize the storage facility and logistics system, and assistance both small-scale examinations and large orders. It adjusted to the changing requirements of clients by responding flexibly to these changes.
4. Technical support
Zhishang Bio’s technical group can offer suggestions on product applications, formula optimization and analysis of industry patterns to aid clients fix technological troubles during production and boost item efficiency.
5. Efficient after-sales service
Zhishang Bio provides complete monitoring, reacts to client requests and delivers promptly. This will certainly make certain customer complete satisfaction.
Zhishang Biography intends to help consumers expand their service by providing the very best solutions and chemical resources.
FAQ
DO YOU ACCEPT SAMPLE ORDER?
We will make samples before mass production. After the samples are approved by the department and users, we will start mass production. During the production process, we will carry out 100% inspection, and then carry out random inspection before packaging.
WHAT’S YOUR MOQ?
Our MOQ is 1kg. But usually we can also accept a smaller quantity, such as 100g, if you need it, provided that the sample fee is 100% paid.
IS THERE A DISCOUNT?
Different quantity has different discount.
HOW TO CONFIRM WHETHER THE PRODUCT QUALITY MEETS OUR NEEDS BEFORE PLACING AN ORDER?
You can consult us to get free samples of some products, you only need to pay the freight or arrange express delivery to us and get the samples. You can send us the product specifications and requirements you need, and we will manufacture products according to your requirements.
DO YOU SUPPLY PRODUCT REPORT?
Yes. We’ll give you product analysis report before shipping.
LEARN MORE ABOUT US
Shandong Look Chemical
Advice on Shipping
1. For products ≤50kg, we recommend using express delivery, which is usually called DDU service (discounted, convenient).
2. For products ≤500kg, we generally recommend air freight, which is usually called FOB, CFR or CIF service (fast and efficient).
3. For products >500kg, we generally recommend shipping by sea, which is usually called FOB, CFR or CIF service (economical, safe).
4. For high-value products, please choose air or express to ensure the safety of product transportation.
Company Info
Zhishang Bio company in China that exports chemicals, Cosmetic raw materials, and Intermediates for over 70 countries now.
And a range of 50,000 products with the best quality and competitive price to meet your different purchasing needs.
The company integrates research and development, production, and trade, with a modern production base, advanced testing equipment, and an experienced technical team to ensure that products reach industry-leading levels in purity, stability, and environmental friendliness.
