203251-38-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203251-38-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,2,5 and 1 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 203251-38:
(8*2)+(7*0)+(6*3)+(5*2)+(4*5)+(3*1)+(2*3)+(1*8)=81
81 % 10 = 1
So 203251-38-1 is a valid CAS Registry Number.
203251-38-1Relevant articles and documents
A New Approach for the Synthesis of some 1,4-Benzoxathiin 4,4-Dioxide Derivatives
Fan, Ai-Long,Cao, Song,Zhang, Zheng
, p. 1657 - 1660 (2007/10/03)
A series of 1,4-benzoxathiin 4,4-dioxide derivatives have been prepared by a new synthetic route. The reactions of 2-chloro-4-nitrobenzenethiol 1 with 1-aryl-2-chloroethanones 2 in the presence of sodium hydroxide give 1-aryl-2-(2-chloro-4-nitrophenylthio
