Structural formula of flavonoid

Structural formula of flavonoid

Structural formula

Business number 051A
Molecular formula C28H12N2O2
Molecular weight 408.41

Restore yellow G,

Shilin Huang G,

Restore yellow 1,


Restore yellow 5RC,

Pigment Yellow 24

Numbering system

CAS number:475-71-8

MDL number:None

EINECS number:207-498-0

RTECS number:None

BRN number:None

PubChem ID:None

Physical property data

1. Properties: orange-yellow powder

2. Density (g/ m3, 25/4℃): Undetermined

3. Relative vapor density (g/cm3, air=1): Not determined

4. Melting point (ºC): Not determined

5. Boiling point ( ºC, normal pressure): Undetermined

6. Boiling point (ºC, 5.2kPa): Undetermined

7. Refractive index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific rotation (º): Undetermined

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (kPa, 25ºC): Undetermined

12. Saturated vapor pressure (kPa, 60ºC): Undetermined

13. Heat of combustion (KJ/ mol): Undetermined

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Oil and water ( Log value of the partition coefficient (octanol/water): Undetermined

17. Explosion upper limit (%, V/V): Undetermined

18. Explosion lower limit (%, V/ V): Undetermined

19. Solubility: Insoluble in acetone, ethanol, chloroform and toluene, slightly soluble in o-chlorophenol and pyridine, soluble in hot nitrobenzene.

Toxicological data


Ecological data

This substance may be harmful to the environment, and special attention should be paid to water bodies.

Molecular structure data

1. Molar refractive index: 123.99

2. Molar volume (cm3/mol): 259.2

3. Isotonic specific volume (90.2K ): 811.2

4. Surface tension (dyne/cm): 95.9

5. Polarizability (10-24cm3): 49.15

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): 5.4

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond acceptors: 4

4. Number of rotatable chemical bonds: 0

5.Number of tautomers: None

6. Topological molecule polar surface area 59.9

7. Number of heavy atoms: 32

8. Surface charge: 0

9. Complexity: 773

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determined number of chemical bond stereocenters: 0

14. Uncertain number of chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

Use and store according to specifications. It will not decompose and avoid contact with oxides.

It appears blue in alkaline insurance powder reducing solution and green in acidic reducing solution. It is dark orange in concentrated sulfuric acid and yellow precipitate after dilution. It is a weak and brittle cloth type that is difficult to oxidize and will discolor after soaping.

Storage method

Keep it sealed and placed in a ventilated and dry place to avoid contact with other oxides. Sun protection, heat protection and moisture protection.

Synthesis method

Use 1-chloro-2-acetylaminoanthraquinone as raw material, in DMF medium, use copper powder as catalyst to complete the dechlorination and condensation reaction. After copper removal, in concentrated The product is obtained by hydrolysis and ring closing in the presence of sulfuric acid.


1. Mainly used for dyeing and printing of cotton, V-C, V/C, polyester/COTTON. It has good affinity for cotton fibers and good level dyeing properties. Since it is difficult to oxidize, it can be oxidized with hydrogen peroxide or sodium perborate to obtain bright and bright colors. Also used in the manufacture of organic pigments.

2. This product is a substitute for restoring golden GOK. It can be used for jig dyeing, suspension pad dyeing and cotton yarn dyeing on cotton cloth. . It can be used for direct printing and discharge printing, and can also be used for green spelling.

BDMAEE:Bis (2-Dimethylaminoethyl) Ether

CAS NO:3033-62-3

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