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5,10,15,20a-tetraphenyl-21H,22H,23H-20a-homo-porphine-20-carboxylic acid ethyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

57766-47-9

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57766-47-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57766-47-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,7,6 and 6 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 57766-47:
(7*5)+(6*7)+(5*7)+(4*6)+(3*6)+(2*4)+(1*7)=169
169 % 10 = 9
So 57766-47-9 is a valid CAS Registry Number.

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