291523-42-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 291523-42-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,9,1,5,2 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 291523-42:
(8*2)+(7*9)+(6*1)+(5*5)+(4*2)+(3*3)+(2*4)+(1*2)=137
137 % 10 = 7
So 291523-42-7 is a valid CAS Registry Number.