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2,9-dibenzylidene-2,3,8,9-tetrahydro-pyrano[3,2-f]chromene-1,10-dione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

60639-56-7

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60639-56-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 60639-56-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,0,6,3 and 9 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 60639-56:
(7*6)+(6*0)+(5*6)+(4*3)+(3*9)+(2*5)+(1*6)=127
127 % 10 = 7
So 60639-56-7 is a valid CAS Registry Number.

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