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9-oxo-4,9-dihydro-pyrazolo[5,1-b]quinazoline-3-carbaldehyde is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

39998-67-9

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39998-67-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 39998-67-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,9,9 and 8 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 39998-67:
(7*3)+(6*9)+(5*9)+(4*9)+(3*8)+(2*6)+(1*7)=199
199 % 10 = 9
So 39998-67-9 is a valid CAS Registry Number.

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