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54252-59-4

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54252-59-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 54252-59-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,2,5 and 2 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 54252-59:
(7*5)+(6*4)+(5*2)+(4*5)+(3*2)+(2*5)+(1*9)=114
114 % 10 = 4
So 54252-59-4 is a valid CAS Registry Number.

54252-59-4Relevant articles and documents

Synthesis of some new semisynthetic penicillins

Ibrahim,Rida,Beltagy,Abdel Khalek

, p. 581 - 582 (2007/10/13)

Four semisynthetic penicillin, namely, o toloxy methylpenicillin, 4,6 dibromo 2 methyl phenoxy methylpenicillin, 2,6 dibromo 4 methyl phenoxy methylpenicillin and o nitrophenoxy methylpenicillin were synthesized by acylating 6 amino penicillanic acid with the appropriate acid chlorides These penicillins were tested for their antibacterial activities. Some penicillin salts were also prepared from penicillin G sodium salt and also different procaine derivatives, including those of 3,5 dibromoprocaine, 3,5 diiodoprocaine, N benzoylprocaine, N p nitro benzoylprocaine and N tosylprocaine. The ultraviolet spectra and solubilities of these salts were studied.

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