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Ethylene Glycol Ketal of cis-3-Acetyl-4,5-dihydroxy-7-oxoxantho<2,3-f>tetralin 4,5-Acetonide is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

90641-23-9

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90641-23-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 90641-23-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,6,4 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 90641-23:
(7*9)+(6*0)+(5*6)+(4*4)+(3*1)+(2*2)+(1*3)=119
119 % 10 = 9
So 90641-23-9 is a valid CAS Registry Number.

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