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155997-20-9

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155997-20-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 155997-20-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,9,9 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 155997-20:
(8*1)+(7*5)+(6*5)+(5*9)+(4*9)+(3*7)+(2*2)+(1*0)=179
179 % 10 = 9
So 155997-20-9 is a valid CAS Registry Number.

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