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4-bromo-5-(4-hydroxymethyl-[1,2,3]triazol-1-yl)-2-phenyl-2H-pyridazin-3-one is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

21171-81-3

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21171-81-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21171-81-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,7 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21171-81:
(7*2)+(6*1)+(5*1)+(4*7)+(3*1)+(2*8)+(1*1)=73
73 % 10 = 3
So 21171-81-3 is a valid CAS Registry Number.

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