647-84-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 647-84-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,4 and 7 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 647-84:
(5*6)+(4*4)+(3*7)+(2*8)+(1*4)=87
87 % 10 = 7
So 647-84-7 is a valid CAS Registry Number.
647-84-7Relevant articles and documents
Cyclization of Polyfluoroalkyl-α-acetyl-γ-butyrolactone with Hydrazine
Gorbunova,Zapevalov,Saloutin
, p. 360 - 362 (2007/10/03)
Reaction of 3-acetyl-5-(2,2,3,3,4,4,4-heptafluorobutyl)tetrahydrofuran-2-one with hydrazine hydrate in methanol yields 5-(2,2,3,3,4,4,4-heptafluorobutyl)-3-methyl-4,5-dihydro-1H-furo[3,2-d]pyrazole.