21906-12-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21906-12-7 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 6 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21906-12:
(7*2)+(6*1)+(5*9)+(4*0)+(3*6)+(2*1)+(1*2)=87
87 % 10 = 7
So 21906-12-7 is a valid CAS Registry Number.