138711-33-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138711-33-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,7,1 and 1 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138711-33:
(8*1)+(7*3)+(6*8)+(5*7)+(4*1)+(3*1)+(2*3)+(1*3)=128
128 % 10 = 8
So 138711-33-8 is a valid CAS Registry Number.
138711-33-8Relevant articles and documents
Dimethyldioxirane epoxidation of 6,6-disubstituted fulvenes
Adam,Hadjiarapoglou,Meffert
, p. 6697 - 6700 (2007/10/02)
The endocyclic bis-epoxides of various pentafulvenes were readily prepared by epoxidation with excess dimethyldioxirane; stoichiometric epoxidation yielded mixtures of the bis-epoxides and the labile monoepoxides, but no exocyclic epoxides were observed.