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Quick Details

  • CAS No.: 7220-79-3
  • Other Names: Methyl cotton blue,Bavarian blue,Ink blue,Brilliant cotton blue
  • MF: C37H27N3Na2O9S3
  • EINECS No.: 249-352-9
  • Place of Origin: Beijing, China (Mainland)
  • Purity: Reagent grade
  • Classification: High Purity Reagents
  • Brand Name: Solarbio
  • Model Number: M8030

Packaging & Delivery

Packaging Details 10g,100g
Delivery Time Shipped in 7 days after payment


Product Description


High Quality Reagents Methylene Blue

Detailed Product Description



Swiss blue3,7-bis(Dimethylamino)phenazathionium chlorideBasic Blue 9Tetramethylthionine chloride

Molecular Formula

C16H18ClN3S · 3H2O

Molecular Weight


CAS Number




















Dye Content(DryBasis)




















Loss on Drying





Residue on Ignition













  • Methylene Blue is a recommended stain for agarose gels when recovery of DNA is required.
  • The benefit of using methylene blue (rather than ethidium bromide) is the ability to use a white light box for visualization and photography in place of a UV light box.

Staining DNA Protocol:

  1. Stain a 1% gel for 15 minutes with 0.02% Methylene Blue Solution in distilled water.
  2. Destain with distilled water for 15 minutes.

Staining RNA Protocol (bonded to nylon or nitrocellulose membranes):

  1. Soak the dried filter in 5% acetic acid at room temperature for 15 minutes.
  2. Place the filter in 0.5M sodium acetate (pH 5.2) and 0.04% methylene blue for 5 -10 minutes at room temperature.
  3. Rinse the filter in water for 5 - 10 minutes.

Physical Specifications: 

  • CAS#: 7220-79-3
  • Molecular Formula: C16H18ClN3S * 3H2O
  • Molecular Weight: 373.9
  • Em (661nm water): >69,000
  • Arsenic: 0.0008%
  • Copper: <0.01%
  • Moisture: Max. 15.0%
  • Zinc: <0.001%
  • Lead: <0.001%
  • Dye Content (Dry Basis): 98 - 103%

Storage: Store at room temperature. Protect from moisture.

Warning: Irritant. Avoid contact with eyes, skin, and clothing. Do not take internally. Wash thoroughly with water after handling. See Material Safety Data Sheet for additional information. This item is manufactured for laboratory research only and will not be shipped to other types of commercial or residential addresses.

Packaging & Shipping



1.Q: How about your samples?

    A: Depends on your quantity.


2.Q: What is your delivery time?

    A: Within 7 days after payment.


3.Q: How about your payment methods?

    A: T/T, Western Union, Paypal are acceptable. Also the payment could via alibaba.


4.Q: Are your manufacture?

    A: Yeah, we are. Our company is located in Beijing. You are welcome to visit our company.


5.Q: Which shipping methods do you have?

    A: Shipping by International Express, such as DHL, FEDEX, TNT, UPS, EMS.

Company Information

About US

Founded in 2000, Beijing Solarbio Science & technology Co. Ltd. is a large high-tech biological enterprise integrating R & D, production, sales and service. Headquartered in Beijing, the company has branches or agents in more than 30 provinces and cities across the country.


With a nationwide service network, it is one of the largest life science R & D Reagent Suppliers in China. Our company exports products to American, Japan and other developed countries in Europe. Through the Alibaba international website and has been highly recognized in the international market.


At present, our company supplies nearly 10,000 kinds of products, over 5,000 of which are available in stock. Our products involve molecular biology, cell biology, immunology, biomedicine and other relevant areas. We continuously expand the range of our products to provide customers with the best and most professional products.


Our products have been widely used in many famous scientific research institutes such as China Academy of Sciences, Tsinghua University, Beijing University and Fudan University. With reliable and stable quality product and perfect after-sale service we established a good brand image. Now Solarbio has been recognized by scientific researchers in China and become a famous band recommended by many distributors.


With professional R & D and quality inspection team, advanced storage and logistics system as well as strict GMP and ISO 9000 standards for production and management, we are committed to provide users with the best reagents, the most professional products and the most perfected solutions, aiming to build a world-class national brand.


We are determined to take an independent brand strategy. Meanwhile, we look forward to further cooperation with more scientific research institutes and make efforts for the development of human life science research to achieve mutual benefit and win-win results.


Our Services

1. Sample require: we can provide sample.

    More details, welcome your contacting.   Skype: Solarbio Sales


2. Quick delivery, usually within 1 to 3 days after your payment, within 10 days with mass quantity.


3. Fast and safe Shipping methods, such as DHL, FEDEX, TNT, UPS, EMS.


4. Various and convenient payment methods available, such as T/T, Paypal, Western Union.


5. We insist: Customer first. High quality guarantee with best service for each customers.


Transaction History of the Supplier

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China (Mainland) | Manufacturer, Trading Company
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Supplier's Trade Assurance Limit: US $35,000
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