33421-87-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 33421-87-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,4,2 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 33421-87:
(7*3)+(6*3)+(5*4)+(4*2)+(3*1)+(2*8)+(1*7)=93
93 % 10 = 3
So 33421-87-3 is a valid CAS Registry Number.
33421-87-3Relevant academic research and scientific papers
Molinari, Aurora,Oliva, Alfonso
, p. 479 - 480 (1996)
3-Hydroxy-1-phenyl-2-pyrazolin-5-one 1 reacts with primary, secondary and allylic alcohols under catalytic acidic conditions and in the presence of 3 A molecular sieves, to afford 3-alkoxy-1-phenyl-2-pyrazolin-5-ones 3.
