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Diphenyl-<β-diaethylcarbamoyl-aethyl>-phosphinoxyd is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

21990-31-8

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21990-31-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21990-31-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,9 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21990-31:
(7*2)+(6*1)+(5*9)+(4*9)+(3*0)+(2*3)+(1*1)=108
108 % 10 = 8
So 21990-31-8 is a valid CAS Registry Number.

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