55821-20-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 55821-20-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,8,2 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 55821-20:
(7*5)+(6*5)+(5*8)+(4*2)+(3*1)+(2*2)+(1*0)=120
120 % 10 = 0
So 55821-20-0 is a valid CAS Registry Number.
55821-20-0Relevant articles and documents
Configurational assignment and 1H-NMR spectral parameters of the isomeric 1,4-diacetoxy-2,3-dimethylcyclopentanes
van Haver,Tavernier,Anteunis,Vandewalle
, p. 105 - 108 (2007/10/10)
All six 1,4-diacetoxy-2,3-dimethyl-cyclopentanes have been prepared starting from 2, 3-dimethyl-4-hydroxy-2-cyclopentenone. 1H-NMR spectral parameters, allowing configurational assignment, are discussed.