133031-40-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133031-40-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,0,3 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 133031-40:
(8*1)+(7*3)+(6*3)+(5*0)+(4*3)+(3*1)+(2*4)+(1*0)=70
70 % 10 = 0
So 133031-40-0 is a valid CAS Registry Number.
133031-40-0Relevant articles and documents
Michael-addition of malononitrile to 1,3-diaryl-2-propen-1-ones
Al-Arab,Tabba,Ghanem,Olmstead
, p. 1157 - 1159 (2007/10/02)
2,4,6-Triaryl-3-aroyl-4-hydroxy-1, 1-cyclohexanedicarbonitriles have been prepared by the base-catalyzed reaction of variously substituted α,β-unsaturated ketones with malononitrile in anhydrous ether at room temperature. Their structures have been establ