43115-21-5 Usage
Chemical composition
Derived from naphthalene and benzoxazole, consisting of two benzoxazole moieties connected by a naphthalene bridge.
Industrial applications
Used as a fluorescent whitening agent in textiles, paper, and plastics.
Light absorption and fluorescence
Capable of absorbing ultraviolet light and emitting blue fluorescence, enhancing the brightness and whiteness of materials.
Light stability
Resistant to degradation from exposure to light, maintaining its effectiveness over time.
Heat resistance
Able to withstand high temperatures, making it suitable for use in various manufacturing processes.
Chemical resistance
Resistant to chemicals, allowing for its use in a wide range of industrial applications without reacting with other substances.
Versatility
Due to its stability and effectiveness, 2,2'-(naphthalene-1,4-diyl)bis[5-(ethylsulphonyl)benzoxazole] is an important ingredient in the manufacturing of various consumer and industrial products.
Check Digit Verification of cas no
The CAS Registry Mumber 43115-21-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,3,1,1 and 5 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 43115-21:
(7*4)+(6*3)+(5*1)+(4*1)+(3*5)+(2*2)+(1*1)=75
75 % 10 = 5
So 43115-21-5 is a valid CAS Registry Number.
43115-21-5Relevant academic research and scientific papers
Eine einfache Methode zur Herstellung von Benzoxazolen
Seha, Zdenek,Weis, Claus D
, p. 413 - 419 (2007/10/02)
The preparation of benzoxazoles by a facile one-pot reaction is reported.The reaction of carboxylic acids with 2-chloro-N-methyl-Δ1-pyrrolinium chloride in an excess of N-methyl-2-pyrrolidone afforded carboxylic acid chlorides which were converted subsequently to their 2-hydroxyanilides by addition of 2-aminophenols.Cyclization of the 2-hydroxy-anilides at elevated temperatures furnished the benzoxazoles in high yield and purity.
