423769-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 423769-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,3,7,6 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 423769-23:
(8*4)+(7*2)+(6*3)+(5*7)+(4*6)+(3*9)+(2*2)+(1*3)=157
157 % 10 = 7
So 423769-23-7 is a valid CAS Registry Number.