EOSIN Y FREE ACID

PRODUCT IDENTIFICATION
CAS NO. 15086-94-9

EOSIN Y FREE ACID

EINECS NO. 239-138-3
FORMULA C20H8Br4O5
MOL WT. 647.90
H.S. CODE  
SMILES

 

TOXICITY  
SYNONYMS 2,4,5,7-Tetrabromofluorescein (free acid); C.I. 45380:2;
2',4',5',7'-Tetrabromo-3',6'-dihydroxy-spiro[3H-isobenzofuran-1,9'-xanthen]-3-one; Tetrabromofluorescein; D&C Red NO. 21; Bromo acid; Bronze Bromo ES; Bromofluorescein; Acid Red 87; Eosin yellowish; Solvent Red 43; Eosin (yellowish) (free acid); 2,4,5,7-Tetrabromo-3,6-dihydroxyxanthene-9-spiro-1'-3H-isobenzofuran-3'-one; ; 2',4',5',7'-Tetrabromofluorescein;

CLASSIFICATION

FLUORESCENT DYES /

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE orange to red powder
MELTING POINT 295 C
BOILING POINT  
SPECIFIC GRAVITY  
SOLUBILITY IN WATER freely souluble
pH 7 - 8
VAPOR DENSITY  

AUTOIGNITION

 

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

 

STABILITY Stable under ordinary conditions.

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

 orange to red powder

DYE CONTENT

 ~ 99%
TRANSPORTATION
PACKING 25kgs in fiber drum
HAZARD CLASS Not regulated
UN NO.  
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

LeishmanĄ¯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

JennerĄ¯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