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99521-97-8

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99521-97-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 99521-97-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,5,2 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 99521-97:
(7*9)+(6*9)+(5*5)+(4*2)+(3*1)+(2*9)+(1*7)=178
178 % 10 = 8
So 99521-97-8 is a valid CAS Registry Number.

99521-97-8Relevant articles and documents

PORPHYRINS AND THEIR DERIVATIVES XI. PORPHYRINS CONTAINING AN OXYETHYLENE CHAIN

Mel'nik, V. I.,Zhilina, Z. I.,Andronati, S. A.,Mamontov, V. P.

, p. 763 - 767 (2007/10/02)

The alkylation of ethylene glycol, pyrocatechol, 2,6-hydroxymethylpyridine, and p-hydroxybenzaldehyde with mono(6-chloro-3-oxahexyloxyphenyl)triphenylporphyrin leads to the formation of monoethers.They were used for the production of covalently bonded dimeric porphyrins with various orientations in space and also pentameric porphyrin and its copper complex.

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