EOSIN B

PRODUCT IDENTIFICATION
CAS NO. 548-24-3

EOSIN B

EINECS NO. 208-943-1
FORMULA C20H6Br2N2Na2O9
MOL WT. 624.06
H.S. CODE  
SMILES

 

TOXICITY  
SYNONYMS Acid Red 91; C.I. 45400; C.I. Acid Red 91;
4',5'-Dibromo-2',7'-dinitrofluorescein, disodium salt; Eosin Bluish; Saffrosine; Eosin Scarlet; 4',5'-dibromo-3',6'-dihydroxy- 2',7'-dinitro-spiro[isobenzofuran-1(3H), 9'-[9H]xanthen]- 3-one, disodium salt;

CLASSIFICATION

FLUORESCENT DYES /

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE red to purple crystalline powder
MELTING POINT  
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER soluble
pH  
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS Health: 1 Flammability: 1 Reactivity: 0
FLASH POINT

 

STABILITY Stable under ordinary conditions. Hygroscopic.

GENERAL DESCRIPTION & APPLICATIONS
Eosin is a red fluorescent dye in the form of triclinic crystals; soluble in spirit, sodium or potassium salts are soluble in water, ethyl ester is alcohol soluble. All eosins are bromine derivatives of fluorescin, used in dyeing textiles, ink manufacturing, in coloring cosmetics, in coloring gasoline and as a toner. The sodium or potassium salt of eosin, red to rose-colored crystalline powder, is used in biology to stain cells. Eosin is strongly absorbed by red blood cells, colouring them bright red. Eosin imparts reddish colour to cytoplasmic materials and and connective tissue (cell membranes, extracellular structures) as a counterstain to haematoxylin and some Gram staining.

Eosin B: Dibromodinitrofluorescein (or its disodium salt), water-soluble, distinctly bluish shade , a cytoplasmic counterstain for hematoxylin.

Eosin Y: Tetrabromofluorescein (or its disodium salt), water-soluble, distinctly yellowish shade, a counterstain against hematoxylin, a constituent of Wright stain, in modified Nocht's stain, a constituent in eosin-methylene blue medium.
SALES SPECIFICATION

APPEARANCE

 red to purple crystalline powder

DYE CONTENT

 ~ 85%
TRANSPORTATION
PACKING 25kgs in fiber drum
HAZARD CLASS Not regulated
UN NO.  
OTHER INFORMATION
Hazard Symbols: XN, Risk Phrases: 22, Safety Phrases: 22-24/25
UV wavelength : 511 - 520 nm
MOLECULAR COMPOUNDS OF EOSIN

Product

CAS RN
Griseofulvin 126-07-8
Eosin B 548-24-3
Eosin G 548-26-5
Eosinic acid 596-03-2
Diethylcarbamazine citrate 1642-54-2
Acid Phloxine PB 2134-15-8
Acid Orange 11 4372-02-5
Acid Red 4 5858-39-9

Ethyl eosin

6359-05-3

Eosin alcohol soluble

6359-05-3
Phloxine 6441-77-6

Eosin diacetate

7284-92-6

Leishman’s stain

12627-53-1
Phloxine O 13473-26-2

Eosin Y Base

15086-94-9
Erythrosine acid 15905-32-5
2',4',5',7'-Tetrabromofluorescein, aluminum salt 16508-80-8

Eosin Y

17372-87-1

Phloxine B

18472-87-2

Azure II-Eosin

53092-85-6

Eosin B Base

56360-46-4

Eosin 5-isothiocyanate

60520-47-0

Jenner’s stain

62851-42-7
Eosinophilopoietin 64734-77-6

Wright stain

68988-92-1
Iodoacetamidoeosin 69414-31-9

5-Maleimido-eosin

75350-45-7
5-Aminoeosin 75900-75-3
Eosin maleimide 76296-42-9
5-(N-Hexadecanoyl)aminoeosin 114586-25-3

Eosin Y bis(tetramethylammonium) salt

123333-96-0

Eosin Y bis(tetrabutylammonium) salt

123333-95-9
Eosinophil-derived neurotoxin 126098-39-3
5-Chloromethyleosin 136832-64-9
Bone marrow proteoglycan 147016-17-9
Archaeosine 148608-52-0