1212138-52-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1212138-52-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,2,1,3 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1212138-52:
(9*1)+(8*2)+(7*1)+(6*2)+(5*1)+(4*3)+(3*8)+(2*5)+(1*2)=97
97 % 10 = 7
So 1212138-52-7 is a valid CAS Registry Number.