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817172-55-7

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817172-55-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 817172-55-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,7,1,7 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 817172-55:
(8*8)+(7*1)+(6*7)+(5*1)+(4*7)+(3*2)+(2*5)+(1*5)=167
167 % 10 = 7
So 817172-55-7 is a valid CAS Registry Number.

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