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(3R,5R,6S)-3-ethyl-2-oxo-1-oxa-spiro[4.4]nonane-6r,7c-dicarboxylic acid-anhydride is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

91497-85-7

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91497-85-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91497-85-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,4,9 and 7 respectively; the second part has 2 digits, 8 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 91497-85:
(7*9)+(6*1)+(5*4)+(4*9)+(3*7)+(2*8)+(1*5)=167
167 % 10 = 7
So 91497-85-7 is a valid CAS Registry Number.

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