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2-(2-nitro-phenylhydrazono)-3-oxo-butyric acid is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

36639-61-9

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36639-61-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 36639-61-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,6,6,3 and 9 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 36639-61:
(7*3)+(6*6)+(5*6)+(4*3)+(3*9)+(2*6)+(1*1)=139
139 % 10 = 9
So 36639-61-9 is a valid CAS Registry Number.
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