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(3aS,4S,5R,7aS)-3a-Hydroxy-5-isopropenyl-7a-methyl-1,6-dioxo-octahydro-indene-4-carboxylic acid methyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

81491-74-9

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81491-74-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81491-74-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,4,9 and 1 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 81491-74:
(7*8)+(6*1)+(5*4)+(4*9)+(3*1)+(2*7)+(1*4)=139
139 % 10 = 9
So 81491-74-9 is a valid CAS Registry Number.

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