1796-92-5 Usage
Description
Chromeazurol B, with the chemical name 4,4'-(1,3-propanediyl)bis(2,6-dimethylphenol) and CAS number 1796-92-5, is a pH-sensitive dye that features a hydroxytriarylmethane core and two carboxylate functional groups. This molecular structure enables it to coordinate easily with metal centers and be used in the preparation of coordination polymers. It is known for its color-changing properties, shifting from brilliant blue to red light navy blue, and is typically found as a brown powder.
Uses
Used in Analytical Chemistry:
Chromeazurol B is utilized as a sensitive stain for detecting aluminum in undecalcified cancellous bone, playing a crucial role in the analysis of dyes and metabolites.
Used in Textile Industry:
Chromeazurol B serves as a dye for wool, providing a brilliant light color and good levelness. It is suitable for fine and carded wool fabrics, as well as silk and nylon. The dye can be applied through acetic acid chromium pretreatment for wool fabric direct printing.
Used in Leather Industry:
In the leather industry, Chromeazurol B is used for dyeing, taking advantage of its color properties and compatibility with leather materials.
Used as an Organic Pigment:
Chromeazurol B can also be employed as an organic pigment due to its color-changing characteristics and solubility properties in various solvents.
Properties and Applications:
Chromeazurol B exhibits the following properties and applications in different areas:
Color: Brilliant blue to red light navy blue
Physical State: Brown powder
Solubility: Soluble in water for brown light yellow (100 g/l at 80 ℃), slightly soluble in alcohol for yellow olive brown
Reaction with Concentrated Sulfuric Acid: Red color, turning golden yellow after dilution
Aqueous Solution: Yellow light brown, turning purple blue upon the addition of sodium hydroxide solution
Metal Sensitivity: Smaller sensitivity, suitable for dyeing applications
Standard:
The standard for Chromeazurol B includes the following ratings for various fastness properties:
Ironing Fastness: ISO 5, AATCC 4-5
Light Fastness: ISO 4, AATCC 4
Fulling: ISO 4, AATCC 5
Perspiration Fastness: ISO 4, AATCC 5
Soaping: ISO 5, AATCC 5
Water: ISO 5, AATCC 5
Alkali: ISO 5, AATCC 5
Acid: ISO 3, AATCC 5
These ratings indicate the performance and suitability of Chromeazurol B for various applications, particularly in the textile and leather industries.
Preparation
2,6-Dichlorobenzaldehyde?and 2-Hydroxy-3-methylbenzoic acid condensation, the product oxidation and changed into sodium salt.
Standard
Ironing Fastness
Alkali
Acid
ISO
5
AATCC
4-5
Check Digit Verification of cas no
The CAS Registry Mumber 1796-92-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,9 and 6 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1796-92:
(6*1)+(5*7)+(4*9)+(3*6)+(2*9)+(1*2)=115
115 % 10 = 5
So 1796-92-5 is a valid CAS Registry Number.
InChI:InChI=1/C23H16Cl2O6.2Na/c1-10-6-12(8-14(20(10)26)22(28)29)18(19-16(24)4-3-5-17(19)25)13-7-11(2)21(27)15(9-13)23(30)31;;/h3-9,26H,1-2H3,(H,28,29)(H,30,31);;/q;2*+1/p-2/b18-13+;;
