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4-bromo-5-chloro-2-nitrobenzaldehyde is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

202808-23-9

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202808-23-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 202808-23-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,8,0 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 202808-23:
(8*2)+(7*0)+(6*2)+(5*8)+(4*0)+(3*8)+(2*2)+(1*3)=99
99 % 10 = 9
So 202808-23-9 is a valid CAS Registry Number.

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