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81647-80-5

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81647-80-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81647-80-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,4 and 7 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81647-80:
(7*8)+(6*1)+(5*6)+(4*4)+(3*7)+(2*8)+(1*0)=145
145 % 10 = 5
So 81647-80-5 is a valid CAS Registry Number.

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