199451-69-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 199451-69-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,4,5 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 199451-69:
(8*1)+(7*9)+(6*9)+(5*4)+(4*5)+(3*1)+(2*6)+(1*9)=189
189 % 10 = 9
So 199451-69-9 is a valid CAS Registry Number.
199451-69-9Relevant academic research and scientific papers
Synthesis of polysubstituted thiophenes by a catalytic cyclisation of functionalised episulfides
Marson, Charles M.,Campbell, Jonathan
, p. 7785 - 7788 (2007/10/03)
Substituted thiophenes are formed by the reaction of 1-alkynyl-2,3- epithioalcohols with a catalytic amount of mercury prepared from HgO and dilute sulfuric acid.
