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2,7-dichloro-9-oxo-fluorene-4-carboxylic acid is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

53221-15-1

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53221-15-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 53221-15-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,2,2 and 1 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 53221-15:
(7*5)+(6*3)+(5*2)+(4*2)+(3*1)+(2*1)+(1*5)=81
81 % 10 = 1
So 53221-15-1 is a valid CAS Registry Number.

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