1637656-38-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1637656-38-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,3,7,6,5 and 6 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1637656-38:
(9*1)+(8*6)+(7*3)+(6*7)+(5*6)+(4*5)+(3*6)+(2*3)+(1*8)=202
202 % 10 = 2
So 1637656-38-2 is a valid CAS Registry Number.