1355339-21-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1355339-21-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,5,5,3,3 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1355339-21:
(9*1)+(8*3)+(7*5)+(6*5)+(5*3)+(4*3)+(3*9)+(2*2)+(1*1)=157
157 % 10 = 7
So 1355339-21-7 is a valid CAS Registry Number.