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Toluene-4-sulfonic acid 2,2,4-trimethyl-3-oxo-pentyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

40055-56-9

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40055-56-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40055-56-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,0,5 and 5 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 40055-56:
(7*4)+(6*0)+(5*0)+(4*5)+(3*5)+(2*5)+(1*6)=79
79 % 10 = 9
So 40055-56-9 is a valid CAS Registry Number.

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