186250-45-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 186250-45-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,6,2,5 and 0 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 186250-45:
(8*1)+(7*8)+(6*6)+(5*2)+(4*5)+(3*0)+(2*4)+(1*5)=143
143 % 10 = 3
So 186250-45-3 is a valid CAS Registry Number.
186250-45-3Relevant academic research and scientific papers
Formation of 3,3,5,7-tetranitrooxindole and 3,5,7-trinitroindazole by nitration of oxindole
Bergman, Jan,Bergman, Solveig
, p. 9263 - 9266 (2007/10/03)
Nitration (HNO3/H2SO4) of oxindole gave 3,3,5,7-tetranitrooxindole (1c), which readily underwent ring-opening and decarboxylation to 4,6-dinitro-2-(dinitromethyl)aniline (4b), which in turn could be cyclized to 3,5,7-trinitroindazole (5).
