681841-03-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 681841-03-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,1,8,4 and 1 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 681841-03:
(8*6)+(7*8)+(6*1)+(5*8)+(4*4)+(3*1)+(2*0)+(1*3)=172
172 % 10 = 2
So 681841-03-2 is a valid CAS Registry Number.
681841-03-2Relevant academic research and scientific papers
Synthesis of substituted dibenz[b,f]oxepines from 2,4,6-trinitrotoluene
Samet,Marshalkin,Lyssenko,Semenov
experimental part, p. 347 - 350 (2010/07/09)
1,3-Dinitro[b,f]dibenzoxepine undergoes nucleophilic substitution with O-and S-nucleophiles, the nitro group at position 1 (peri-nitro group) being selectively replaced. The factors responsible for the selectivity of the reaction are discussed.
