21901-74-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21901-74-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,0 and 1 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21901-74:
(7*2)+(6*1)+(5*9)+(4*0)+(3*1)+(2*7)+(1*4)=86
86 % 10 = 6
So 21901-74-6 is a valid CAS Registry Number.