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2r,3c;4c,5c-diepoxy-2,3t,4t,5t-tetraphenyl-cyclopentanone is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

22221-99-4

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22221-99-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 22221-99-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,2,2 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 22221-99:
(7*2)+(6*2)+(5*2)+(4*2)+(3*1)+(2*9)+(1*9)=74
74 % 10 = 4
So 22221-99-4 is a valid CAS Registry Number.
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