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98990-28-4

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98990-28-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 98990-28-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,9,9 and 0 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 98990-28:
(7*9)+(6*8)+(5*9)+(4*9)+(3*0)+(2*2)+(1*8)=204
204 % 10 = 4
So 98990-28-4 is a valid CAS Registry Number.

98990-28-4Relevant articles and documents

Synthesis of Hydrocarbon-Strapped Porphyrins Containing Quinone and Phenolic Groups

Morgan, Brian,Dolphin, David

, p. 5364 - 5374 (2007/10/02)

A general synthesis of strapped porphyrins is described and is illustrated for porphyrins bearing quinone and phenol groups in the bridging strap, which is exclusively a polymethylene chain.The NMR and optical spectra of the strapped porphyrins are discussed.

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