27757-79-5 Usage
Uses
Used in Histology:
3-hydroxy-4-(phenylazo)-2-naphthoic acid is used as a staining agent in histology for the detection and visualization of lipids within tissue samples. Its affinity for fats and oils allows for the clear identification of these substances under microscopic examination.
Used in Food and Textile Industry:
In the food and textile industry, 3-hydroxy-4-(phenylazo)-2-naphthoic acid is used as a detection agent for the presence of fats and oils in products. This helps ensure the quality and purity of these materials, although its use is becoming increasingly restricted due to health concerns.
Used in Manufacturing of Printing Inks and Lipsticks:
3-hydroxy-4-(phenylazo)-2-naphthoic acid is also employed in the production of printing inks and lipsticks, where its color properties contribute to the desired visual effects of these products. However, strict regulations and the search for safer alternatives are impacting its use in these applications.
As the awareness of the potential health risks associated with 3-hydroxy-4-(phenylazo)-2-naphthoic acid grows, its applications are becoming more limited. The development and adoption of safer alternatives are crucial to maintaining the quality and safety of products in various industries while minimizing health risks.
Check Digit Verification of cas no
The CAS Registry Mumber 27757-79-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,7,7,5 and 7 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 27757-79:
(7*2)+(6*7)+(5*7)+(4*5)+(3*7)+(2*7)+(1*9)=155
155 % 10 = 5
So 27757-79-5 is a valid CAS Registry Number.
InChI:InChI=1/2C17H12N2O3.Ca/c2*20-16-14(17(21)22)10-11-6-4-5-9-13(11)15(16)19-18-12-7-2-1-3-8-12;/h2*1-10,18H,(H,21,22);/q;;+2/p-2/b2*19-15+;
27757-79-5Relevant academic research and scientific papers
Photochemistry of p-benzoquinone diazide carboxylic acids: Formation of 2,4-didehydrophenols
Sander, Wolfram,Bucher, G?tz,Wandel, Holger,Kraka, Elfi,Cremer, Dieter,Sheldrick, William S.
, p. 10660 - 10672 (2007/10/03)
The photochemistry of p-benzoquinone diazide carboxylic acids (7) was studied using matrix isolation spectroscopy, product analysis, and high-level ab initio molecular orbital theory. The general photochemical pathway observed includes primary carbene formation, followed by secondary photodecarboxylation to yield derivatives of 2,4-didehydrophenol 9. CCSD(T) calculations on the parent 2,4-didehydrophenol (9a) lead to an infrared spectrum which is in excellent agreement with the experiment alone. Furthermore; calculations predict 9a to be characterized by a distorted benzene ring with the hydroxy group pointing toward the radical center in ortho position. The heat of formation of 9a is predicted to be 85 kcal/mol. Its formation from 1-oxo-2,5-cyclohexadien-4-ylidene-2-carboxylic acid (8a) by decarboxylation is exothermic by 30 kcal/mol where strong H-bonding in 8a can be considered to facilitate the formation of 9a.
