99903-75-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99903-75-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,9,0 and 3 respectively; the second part has 2 digits, 7 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 99903-75:
(7*9)+(6*9)+(5*9)+(4*0)+(3*3)+(2*7)+(1*5)=190
190 % 10 = 0
So 99903-75-0 is a valid CAS Registry Number.
99903-75-0Relevant articles and documents
Acylation of 5-amino-3H-1,3,4-thiadiazolin-2-one
Ra, Do Young,Cho, Nam Sook,Cho, Jae Too
, p. 525 - 530 (2007/10/03)
Acylation of 5-amino-3H-1,3,4-thiadiazolin-2-one (2) was undertaken selectively at either the 3-NH position or at 5-amino group depending on reaction conditions. The 3-NH is highly acidic and acylation takes place with acid anhydrides at this position in