109977-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109977-81-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,9,7 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 109977-81:
(8*1)+(7*0)+(6*9)+(5*9)+(4*7)+(3*7)+(2*8)+(1*1)=173
173 % 10 = 3
So 109977-81-3 is a valid CAS Registry Number.
109977-81-3Relevant articles and documents
A Simple, Powerful, and Efficient Method for Transesterification
Meth-Cohn, Otto
, p. 695 - 697 (1986)
Aromatic and α,β-unsaturated methyl esters undergo efficient transesterification at ambient temperature or below with primary, secondary, or (particularly) tertiary alcohols in the presence of butyl-lithium in tetrahydrofuran solution.
