1623-91-2 Usage
General Description
4,4'-diphenoxydiphenylsulfone is an organic compound with the chemical formula C24H18O4S. It is a type of sulfone that is commonly used in the manufacturing of high-performance polymers, such as polyethersulfone and polysulfone. 4,4'-diphenoxydiphenylsulfone has excellent thermal stability, chemical resistance, and mechanical properties, making it suitable for a wide range of applications, including in the aerospace, automotive, and electronics industries. 4,4'-diphenoxydiphenylsulfone is also used as a flame retardant in plastics and as a heat-resistant material in engineering thermoplastics. Additionally, it is known for its high transparency and can be used in optical applications.
Check Digit Verification of cas no
The CAS Registry Mumber 1623-91-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,2 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1623-91:
(6*1)+(5*6)+(4*2)+(3*3)+(2*9)+(1*1)=72
72 % 10 = 2
So 1623-91-2 is a valid CAS Registry Number.
1623-91-2Relevant articles and documents
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Reichle,W.T.
, p. 4254 - 4257 (1972)
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Hydroxybenzophenone-based stabilizers and polymers end-capped with the same
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Paragraph 0118; 0119, (2017/09/08)
The invention relates to hydroxybenzophenone-based compounds of formula (I) that are used to improve UV, thermal, and thereto-oxidative stability of high performance aromatic polymers in a blend or as end-cappers of the same polymers.
N-ALKYL-4-(N',N'-DIALKYLAMINO)PYRIDINIUM SALTS: THERMALLY STABLE PHASE TRANSFER CATALYSTS FOR NUCLEOPHILIC AROMATIC DISPLACEMENT
Brunelle, D. J.,Singleton, Daniel A.
, p. 3383 - 3386 (2007/10/02)
N-Alkyl salts of 4-dialkylaminopyridines are effective phase transfer catalysts which are up to 100 times more stable than tetrabutylammonium bromide to conditions encountered in nucleophilic aromatic substitution reactions.These salts are thermally stable to over 300 deg C, and promote reactions in non-polar solvents (or in the absence of solvent) at temperatures as high as 200 deg C.