FLAVANTHRONE
- CAS NO.：475-71-8
- Empirical Formula: C28H12N2O2
- Molecular Weight: 408.41
- MDL number: MFCD00046959
- EINECS: 207-498-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-27 23:39:01
What is FLAVANTHRONE?
Chemical properties
Brownish-yellow needles. Soluble in dilute alkaline solutions.
The Uses of FLAVANTHRONE
Vat dye for textiles, etc.
Synthesis
Flavanthrone is prepared from 1-chloro- 2-phthalimidoanthraquinone via the 2,2'- diphthalimido-1,1'-bianthraquinonyl, using copper in boiling trichlorobenzene. The alkaline ring closure is accomplished by boiling with excess 3 – 5 % sodium hydroxide, which cleaves both phthalic acid residues simultaneously . Only the unsubstituted flavanthrone is used as a vat dye and pigment.
Properties and Applications
|
TEST ITEMS |
SPECIFICATION |
|
APPEARANCE |
YELLOW POWDER |
|
SHADE |
GREENISH |
|
HEAT RESISTANCE |
180 °C min |
|
LIGHT FASTNESS |
7 |
|
ACID RESISTANCE |
5 |
|
ALKALI RESISTANCE |
5 |
|
FASTNESS TO BLEEDING |
5 |
|
OIL ABSORPTION |
45-50% |
|
SPECIFIC SURFACE |
27 m 2 /g |
|
DENSITY |
1.50 g/cm 3 |
|
RESIDUE ON 80 MESH |
5.0% max |
|
WATER SOLUBLE |
1.0% max |
|
VOLATITE 105 °C |
1.0% max |
|
TINTING STRENGTH |
100-105 % |
Properties of FLAVANTHRONE
| Boiling point: | 730.1±55.0 °C(Predicted) |
| Density | 1.575±0.06 g/cm3(Predicted) |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | Sulfuric Acid (Slightly) |
| form | Solid |
| Colour Index | 70600 |
| pka | -0.82±0.20(Predicted) |
| color | Very Dark Red to Very Dark Brown |
| CAS DataBase Reference | 475-71-8 |
| EPA Substance Registry System | Benzo[h]benz[5,6]acridino[2,1,9,8-klmna]acridine-8,16-dione (475-71-8) |
Safety information for FLAVANTHRONE
Computed Descriptors for FLAVANTHRONE
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