669716-54-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669716-54-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,9,7,1 and 6 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 669716-54:
(8*6)+(7*6)+(6*9)+(5*7)+(4*1)+(3*6)+(2*5)+(1*4)=215
215 % 10 = 5
So 669716-54-5 is a valid CAS Registry Number.
669716-54-5Relevant academic research and scientific papers
Richter, Jindrich,Jirman,Havlicek,Hrdina
, p. 580 - 584 (2007)
Methods of preparation of API pioglitazone were discussed from the point of view of impurities occurrence. Four real impurities (I-IV) of pioglitazone were prepared and characterized by means of NMR spectroscopy.
