20847-51-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20847-51-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,4 and 7 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20847-51:
(7*2)+(6*0)+(5*8)+(4*4)+(3*7)+(2*5)+(1*1)=102
102 % 10 = 2
So 20847-51-2 is a valid CAS Registry Number.
20847-51-2Relevant articles and documents
A new synthesis of ninhydrin and its ketals using iodobenzene diacetate
Prakash, Om,Sharma, Pawan K.,Saini, Neena
, p. 632 - 633 (2007/10/03)
The oxidation of indene-1,3-dione (2) with iodobenzene diacetate-ROH-H2SO4, followed by the acid hydrolysis of the resulting 2,2-dialkoxyindane-1,3-diones (3), provides a new and convenient method for the synthesis of ninhydrin and its ketals.