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3,3'-[7,12-bis-(1-hydroxy-ethyl)-3,8,13,17-tetramethyl-21H,23H-porphine-2,18-diyl]-bis-propionic acid bis-(4-nitro-benzyl) ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

15558-58-4

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15558-58-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 15558-58-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,5,5 and 8 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 15558-58:
(7*1)+(6*5)+(5*5)+(4*5)+(3*8)+(2*5)+(1*8)=124
124 % 10 = 4
So 15558-58-4 is a valid CAS Registry Number.

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