81640-31-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81640-31-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,4 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 81640-31:
(7*8)+(6*1)+(5*6)+(4*4)+(3*0)+(2*3)+(1*1)=115
115 % 10 = 5
So 81640-31-5 is a valid CAS Registry Number.
81640-31-5Relevant articles and documents
ZUR ELEKTRONENSTRUKTUR VICINALER TRIKETONE : BICYCLOHEXAN-2,3,4-TRIONE
Beck, Erich,Hofmann, Peter,Sieber, Alexander
, p. 4683 - 4686 (1981)
Bicyclohexane-2.3.4-trione and its 1.5-dimethyl derivative have been synthesized and investigated by means of photoelectron spectroscopy.