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4-Hydroxy-3-methoxy-1,2-dimethyl-carbazole-9-carboxylic acid tert-butyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

123719-44-8

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123719-44-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 123719-44-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,7,1 and 9 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 123719-44:
(8*1)+(7*2)+(6*3)+(5*7)+(4*1)+(3*9)+(2*4)+(1*4)=118
118 % 10 = 8
So 123719-44-8 is a valid CAS Registry Number.

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