2766-77-0 Usage
Description
CRYSTAL PONCEAU 6R, also known as an organic sodium salt, is the disodium salt of 7-hydroxy-8-[(naphthalen-1-yl)diazenyl]naphthalene-1,3-disulfonic acid. It is characterized by its red color and solubility in water, ethanol, and strong sulfuric acid, with varying shades depending on the solvent and concentration.
Uses
Used in Environmental Testing:
CRYSTAL PONCEAU 6R is used as an analyte in the determination of 36 artificial pigments in the food industry through ultra-high-performance liquid chromatography and time-of-flight mass spectrometry. This application aids in ensuring the safety and quality of the food products by monitoring the presence and concentration of artificial pigments.
Used in Dye Industry:
CRYSTAL PONCEAU 6R is used as a red dye due to its solubility in water and ethanol, producing red and yellow light red shades, respectively. Its color and solubility properties make it suitable for various applications in the dye industry, including coloring fabrics, plastics, and other materials.
Standard:
CRYSTAL PONCEAU 6R has been tested for various standards, including light fastness, soaping, perspiration fastness, oxygen bleaching, and fastness to seawater. The ratings for these standards range from ISO 2-3, indicating its performance and suitability for different applications.
Preparation
Naphthalen-1-amine diazo, and 7-Hydroxynaphthalene-1,3-disulfonic acid coupling.
Standard
Light Fastness
Fading
Stain
ISO
3
Check Digit Verification of cas no
The CAS Registry Mumber 2766-77-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,7,6 and 6 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 2766-77:
(6*2)+(5*7)+(4*6)+(3*6)+(2*7)+(1*7)=110
110 % 10 = 0
So 2766-77-0 is a valid CAS Registry Number.
InChI:InChI=1/C20H14N2O7S2.2Na/c23-17-9-8-13-10-14(30(24,25)26)11-18(31(27,28)29)19(13)20(17)22-21-16-7-3-5-12-4-1-2-6-15(12)16;;/h1-11,21H,(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b22-20+;;
