250667-57-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 250667-57-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,0,6,6 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 250667-57:
(8*2)+(7*5)+(6*0)+(5*6)+(4*6)+(3*7)+(2*5)+(1*7)=143
143 % 10 = 3
So 250667-57-3 is a valid CAS Registry Number.
250667-57-3Relevant articles and documents
Synthesis and hydrolysis of substituted 9-oxa-3,4-diaza-1-phosphabicyclo[4.3.0]nona-3,5-dienes
Trishin,Namestnikov,Bel'skii
, p. 736 - 743 (2007/10/03)
Reactions of 3-dialkoxyphosphino-4,5-dihydrofurans with nitrilimines yield, irrespective of substituent at the carbenium atom of the nitrilimine, substituted 9-oxa-3,4-diaza-1-phosphabicyclo[4.3.0]-nona-3,5-diene 1,1-dialkoxides. These compounds represent
