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ethyl 16-(acetyloxy)-5,6,18,20-tetrahydroxy-14-methoxy-2,7,9,15,17,19,21,25-octamethyl-10,26-dioxo-9,10-dihydro-1H-9,4-(epoxypentadeca[1,11,13]trienoimino)[1]benzofuro[5,4-g]indole-3-carboxylate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

21240-39-1

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21240-39-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21240-39-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,4 and 0 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21240-39:
(7*2)+(6*1)+(5*2)+(4*4)+(3*0)+(2*3)+(1*9)=61
61 % 10 = 1
So 21240-39-1 is a valid CAS Registry Number.

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