309253-56-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 309253-56-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,9,2,5 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 309253-56:
(8*3)+(7*0)+(6*9)+(5*2)+(4*5)+(3*3)+(2*5)+(1*6)=133
133 % 10 = 3
So 309253-56-3 is a valid CAS Registry Number.
309253-56-3Relevant academic research and scientific papers
An improved procedure for the synthesis of 4,4-disubstituted-3-oxo-1,2,5-thiadiazolidine 1,1-dioxides
Xiao,Timberlake
, p. 773 - 777 (2007/10/03)
An improved synthesis for the preparation of 3-oxo-1,2,5-thiadiazolidine 1,1-dioxides has been developed. This facile two-step procedure from α-amino acid esters and chlorosulfonyl isocyanate results in excellent yields of products.
