128917-54-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128917-54-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,1 and 7 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 128917-54:
(8*1)+(7*2)+(6*8)+(5*9)+(4*1)+(3*7)+(2*5)+(1*4)=154
154 % 10 = 4
So 128917-54-4 is a valid CAS Registry Number.
128917-54-4Relevant academic research and scientific papers
Synthesis of Enol Tosylates of β-Keto Esters
Jalander, Lars,Mattinen, Jorma,Oksanen, Lasse,Rosling, Ari
, p. 881 - 886 (2007/10/02)
Some enol tosylates of β-keto esters were prepared by reacting the keto esters with p-tolylsulphonic anhydride in the presence of potassium tert-butoxide in THF and tert-butyl alcohol.
