475-71-8 Usage
Chemical Properties
Brownish-yellow needles. Soluble in
dilute alkaline solutions.
Uses
Vat dye for textiles, etc.
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 %
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 %
Check Digit Verification of cas no
The CAS Registry Mumber 475-71-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,7 and 5 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 475-71:
(5*4)+(4*7)+(3*5)+(2*7)+(1*1)=78
78 % 10 = 8
So 475-71-8 is a valid CAS Registry Number.
InChI:InChI=1/C28H12N2O2/c31-27-15-7-3-1-5-13(15)25-21-17(27)9-12-20-23(21)24-19(29-25)11-10-18-22(24)26(30-20)14-6-2-4-8-16(14)28(18)32/h1-12H
475-71-8Relevant articles and documents
New flavanthrone synthesis method
-
Paragraph 0007, (2016/10/31)
The present invention discloses a new flavanthrone synthesis method belonging to the technical field of dye processing. The method is improved on the basis of a traditional process, and comprises six steps, in a condensation step, low-boiling dimethyl formamide is used, and recovery cost is reduced; an anhydrous ferric chloride and copper powder compound catalyst is used to improve reaction efficiency, and in addition, sodium chlorate and hydrochloric acid are used for removing copper, copper removing effect is good, and product competitiveness is enhanced.
Process for the production of pyranthrones or flavanthrones
-
, (2008/06/13)
A process for the production of pyranthrones or flavanthrones which comprises reacting substituted or unsubstituted 2,2'-dialkyl-1,1'-dianthraquinonyls or 2,2'-diacylamino-1,1'-dianthraquinonyls respectively in a two-phase system of aqueous organic solvents using quaternary ammonium or phosphonium compounds as catalysts.