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83221-54-9

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  • Benzoic acid,3-[2-[4-[2-(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)diazenyl]-1-naphthalenyl]diazenyl]-2-hydroxy-,sodium salt (1: )

    Cas No: 83221-54-9

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83221-54-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 83221-54-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,2,2 and 1 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 83221-54:
(7*8)+(6*3)+(5*2)+(4*2)+(3*1)+(2*5)+(1*4)=109
109 % 10 = 9
So 83221-54-9 is a valid CAS Registry Number.

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