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Benzene, (1-ethyl-1,2-dimethyl-2-propenyl)- is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

71491-57-1

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71491-57-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 71491-57-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,4,9 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 71491-57:
(7*7)+(6*1)+(5*4)+(4*9)+(3*1)+(2*5)+(1*7)=131
131 % 10 = 1
So 71491-57-1 is a valid CAS Registry Number.
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