Tetraiodofluorescein B

Structural formula of tetraiodofluorescein B

Structural formula of tetraiodofluorescein B

Structural formula

Business number 05TR
Molecular formula C20H6l4Na2O5
Molecular weight 879.86


Erythrosine B sodium salt,

Acid Red 51 FB,

Reagents for histochemical research

Numbering system

CAS number:568-63-8

MDL number:MFCD00144257

EINECS number:240-474-8

RTECS number:LM5950000

BRN number:None

PubChem number:24894685

Physical property data

1. Physical property data

1. Properties: red or reddish-brown granules or powder

2. Solubility: easily soluble in water, soluble in glycerin and ethanol, insoluble in fat

3.   Melting point:303

Toxicological data

None yet

Ecological data

None yet

Molecular structure data

None yet

Compute chemical data

4. Computational Chemistry Data:

2. Number of hydrogen bond donors:0

3. Number of hydrogen bond acceptors:5

4. Number of rotatable chemical bonds:1

5. Topological molecular polar surface area (TPSA):89.5

6. Number of heavy atoms:31

7. Surface charge: 0

8. Complexity:797

9. Number of isotope atoms: 0

10. Determine atomic configuration Number of centers:0

11. Uncertain atomic Number of structural centers:0

12. Determine the chemical bond configuration Number of centers:0

13. Uncertain chemical bonding Number of structural centers:0

14. Number of covalent bond units: 3

Properties and stability

1. Basic properties:

Red or reddish-brown granules or powder. Easily soluble in water, soluble in glycerol and ethanol, insoluble in fat. It has poor light resistance, good heat resistance, alkali resistance, redox resistance and bacterial resistance, but is unstable to acid.

Storage method

None yet

Synthesis method

2. Preparation method:

Originated from iodination of fluorescein. Resorcinol, phthalic anhydride and anhydrous zinc chloride are heated and melted to obtain crude fluorescein. After the crude fluorescein is refined with ethanol, it is dissolved in sodium hydroxide solution, and iodine is added for reaction. Add hydrochloric acid to precipitate crystals, then convert them into sodium salt and concentrate them.


3. Purpose:

This product can be used alone or in combination with other food colorings for a variety of foods such as cakes, agricultural and aquatic products processing (cherries, fish cakes, Zhenjin Babao pickles). my country’s hygienic standards for the use of food additives (GB2760-86) regulations, bright red The maximum usage amount in food is0.05g/kg. In addition, the product is also used as a pigment in drugs and cosmetics. Oral administration to ratsLD50for1900mg/kg, the Food and Agriculture Organization of the United Nations and the World Health Organization stipulate that a person’s daily allowable intake (ADI) is0-1.25mg/kg.

BDMAEE:Bis (2-Dimethylaminoethyl) Ether

CAS NO:3033-62-3

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