CAS No 548-24-3 Eosin B Powder Certified by The Biological Stain Commission, Dye Content 90 %

• Type: Pharmaceutical Intermediates
• Appearance: Powder
• Quality: Refined
• CAS No.: 548-24-3
• Formula: C20h9br2n2nao9
• Einecs: 208-943-1
• Model NO.: YB047
• Colour: Very Dark Purple-Red to Dark Brown
• Samples: Available
• Purity: 99%
• Certificates: ISO9001/SGS
• Package: 1kg/5kg/10kg/25kg
• Stocks: in Stock
• Lead Time: 5-7 Working Days
• Shelf Life: 2-3 Years
• Site Audit: Available
• Transport: Air/Express/Sea
• MOQ: 10g
• Transport Package: Drum/Bottle/Bags
• Specification: Dye content 90%
• Trademark: Yunbang OEM
• Origin: China

Product Description

CAS NO 548-24-3 Eosin B powder certified by the Biological Stain Commission, Dye content 90 %
 

Company Informations

Hunan Yunbang Pharmaceutical Co., Ltd. (Yunbangpharm) located in Changsha High-tech Industrial Park, Hunan. It is a high-tech enterprise specializing in the research and development, production and sales of Pharmaceutical raw materials, Pharmaceutical intermediates(API) and Fine chemicals. Based in China, Yunbangpharm has been providing suitable solutions for many domestic,foreign pharmaceutical companies and traders. Excellent quality, good reputation and authentic price have won the praise of the majority of customers.

The company adheres to the corporate tenet of "We do not produce medicines, but help pharmaceutical companies make good medicines".

We can provide customers with customized processing, research and development services;
We can develop high-end Pharmaceutical and chemical products with high technical difficulties,high barriers and unique production processes;
We can provide 100 grams Grade, kilograms, and hundred kilograms of raw material pharmaceutical intermediates and other products.
We can perform -100°C to 300°C reaction.

R&D strength is the company's core competitiveness.Yunbangpharm has maintains a good cooperation relationship with many Universities and Research institutes locally, which can quickly transform R&D results into industrial production.

Our goal : To achieve the integrated upgrade of Pharmaceutical intermediates, raw materials and high-end chemical products, adhere to "serving pharmaceutical companies, creating our brands" to provide customers with high-quality and low-cost pharmaceutical and chemical products, realizing Win-win cooperation and common development.
 

Product Description

 

Application

• Eosin B has been used for the histological analysis of anal sphincter sections obtained from rats.
• It has been used along with Mayer′s hematoxylin for the staining of triangularis sterni muscle sections.
• It has been used along with hematoxylin for the staining of different tissue sections obtained from mouse.

Biochem/physiol Actions

Eosin B is a xanthene dye and is also referred to as eosin bluish or erythrosin B. It is used in the Harris stain for Negri bodies. Eosin B is also used in Mayer′s Hemalum as a counterstain for collagen. Eosin B-Azure A are used together for the staining of cell granules, nuclei and microorganisms. It can also be used for protein estimation. The protein - eosin B complex absorbs at wavelength range of 536-544nm and the change in blue shift helps in determining the protein concentration.

Suitability

Counterstain for collagen, following Mayer′s Hemalum. Used with Azure A as a tissue stain for cell granules, nuclei, and microorganisms. For differential staining of cells of the anterior pituitary.

 

FAQ

1:Can I get some samples before bulk order?
A: Most products provide free samples, but the shipping cost be paid by customers.

2: What's your MOQ?
A: We can have a discussion.

3: Which kind of payment terms do you accept?
A: PI will be sent first after confirmation of order,enclosed our bank information.Payment by T/T, Western Union,D/P, ETC.

4.How to place an order?
A: You can contact me through Trademanager, WhatsApp, Email and other contact methods, tell me the product and quantity you need, and then we will give you a quote.

5:How about your delivery time?
A: Generally, it will take 3 to 5 days after receiving your advance payment.

6:How do you treat quality complaint?
A: First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.
 

Our Advantages

1. 90days quality guarantee for exchange.

2. For each batch order extracts, we will attach a factory Inspection Report with the goods delivery , including the BatchNo/ Date/ Test index ects; also will keep the archived extracts to ensure received by customers are the same each time.

3. Our team of experienced professionals are available online 24 hours a day to answer any questions and provide guidance on product usage and maintenance.
 

Product analysis

 

 

Product Name:	EOSIN B
Synonyms:	C.I. Acid Red 91;Eosin B, high purity biological stain;Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 4',5'-dibromo-3',6'-dihydroxy-2',7'-dinitro-, disodium salt;2-(4,5-dibromo-3,6-dihydroxy-2,7-dinitroxanthen-9-yl)-benzoic acid, disodium salt;EOSIN B CERTIFIED;EOSIN B CERTIFIED (C.I. 45400);EOSIN SCARLET, FOR MICROSCOPY;EOSIN BLUISH, WATER-SOLUBLE, PURE, FOR M ICROSCOPY
CAS:	548-24-3
MF:	C20H9Br2N2NaO9
MW:	604.09
EINECS:	208-943-1
Product Categories:	Organics;Xanthene
Mol File:	548-24-3.mol

Melting point	275 °C (dec.)(lit.)
storage temp.	Store at +5°C to +30°C.
solubility	spirit: soluble
Colour Index	45400
form	Solid
color	Very dark purple-red to dark brown
PH	6.2 (10g/l, H2O, 25ºC)
Water Solubility	Soluble in water (390 g/L at 20°C), and ethanol.
λmax	514 nm, 395 nm
Merck	14,3602
BRN	4121964
Stability:	Stable. Incompatible with strong oxidizing agents.
Biological Applications	Antimalarial agent; protein assay; detecting enzyme activity; treating cancer,malaria,diabetes,a variety of conditions affecting skin,mouth,digestive tract,urinary tract,reproductive tract,respiratory tract,circulatory sys
EPA Substance Registry System	Eosin B (548-24-3)

Hazard Codes	Xn
Risk Statements	22
Safety Statements	22-24/25
WGK Germany	3
TSCA	Yes
HS Code	3204 12 00

 

Chemical Properties	odourless green to reddish-brown solid
Uses	Dyeing wool, cotton, and paper. In histology as a stain for epithelia, muscular fibers, nuclei, etc.
Uses	Eosin B sodium salt is a cell and tissue stain. Eosin B sodium salt is used as a counter stain for collagen, as a tissue stain for cell granules, nuclei, and microorganisms when coupled with Azure A (sc-203729), and as a stain for cell differentiation of the anterior pituitary.
Preparation	will 4′,5′-Dibromofluorescein?(C.I. Acid Orange 11, C.I. 45370) nitrification, and translated into sodium salt or ammonium salt.
Definition	ChEBI: An organic sodium salt which is the disodium salt of eosin b diphenol.
storage	Room temperature

 

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