666214-21-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 666214-21-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,6,2,1 and 4 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 666214-21:
(8*6)+(7*6)+(6*6)+(5*2)+(4*1)+(3*4)+(2*2)+(1*1)=157
157 % 10 = 7
So 666214-21-7 is a valid CAS Registry Number.