6041-94-7 Usage
Chemical Properties
yellowish red or dark red powder
General Description
Yellowish red solid with a tint of pink or dark red powder.
Air & Water Reactions
Azo dyes can be explosive when suspended in air at specific concentrations. Insoluble in water.
Reactivity Profile
Pigment Red 2 is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
Fire Hazard
Flash point data for Pigment Red 2 are not available, however Pigment Red 2 is probably combustible.
Flammability and Explosibility
Notclassified
Properties and Applications
TEST ITEMS
SPECIFICATION
APPEARANCE
RED POWDER
SHADE
BLUISH
HEAT RESISTANCE
140 °C min
LIGHT FASTNESS
5~6
ACID RESISTANCE
4
ALKALI RESISTANCE
4
FASTNESS TO BLEEDING
5
OIL ABSORPTION
40-45%
SPECIFIC SURFACE
25 m
2
/g
DENSITY
1.60 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
RED POWDER
SHADE
BLUISH
HEAT RESISTANCE
140 °C min
LIGHT FASTNESS
5~6
ACID RESISTANCE
4
ALKALI RESISTANCE
4
FASTNESS TO BLEEDING
5
OIL ABSORPTION
40-45%
SPECIFIC SURFACE
25 m
2
/g
DENSITY
1.60 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 6041-94-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,0,4 and 1 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 6041-94:
(6*6)+(5*0)+(4*4)+(3*1)+(2*9)+(1*4)=77
77 % 10 = 7
So 6041-94-7 is a valid CAS Registry Number.
InChI:InChI=1/C23H15Cl2N3O2/c24-15-10-11-19(25)20(13-15)27-28-21-17-9-5-4-6-14(17)12-18(22(21)29)23(30)26-16-7-2-1-3-8-16/h1-13,29H,(H,26,30)/b28-27+
6041-94-7Relevant articles and documents
Synthesis and properties of azonaphtharylamide pigments having arylamide groups at 2- and 7-positions
Otani, Junji,Kikuchi, Takeshi,Higashida, Suguru,Harada, Takashi,Matsumura, Michio
, p. 28 - 35 (2015)
We studied two azonaphtharylamide pigments having arylamide groups at the 2- and 7-positions on the naphthol ring. Presence of the 7-substited amide group distinguishes the pigments from conventional azonaphtharylamide pigments derived from 3-hydroxy-2-naphthoic acid. The 7-substituent caused a hyperchromic effect but did not produce bathochromic shift in the optical absorption spectra in solution compared with the corresponding 7-unsubstituted counterparts. Molecular geometry optimizations through semi-empirical MO calculations showed that extent of the chromophore systems in the pigments with and without the 7-substituent is nearly the same, which is consistent with absence of the bathochromic shift. The MO calculations also showed that the MOs localized in the 7-substituents are involved in the electronic transitions in the longest wavelength bands of the pigments, which is responsible for the hyperchromic effect. The 7-substituted pigments exhibited better resistivity to light and heat than the 7-unsubstituted ones.