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3,4:5,6-di-O-isopropylidene-1,1-bis-ethylsulfanyl-D-glucosamine is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

109721-80-4

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109721-80-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109721-80-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,7,2 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 109721-80:
(8*1)+(7*0)+(6*9)+(5*7)+(4*2)+(3*1)+(2*8)+(1*0)=124
124 % 10 = 4
So 109721-80-4 is a valid CAS Registry Number.

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