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2408-99-3

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2408-99-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2408-99-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,4,0 and 8 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 2408-99:
(6*2)+(5*4)+(4*0)+(3*8)+(2*9)+(1*9)=83
83 % 10 = 3
So 2408-99-3 is a valid CAS Registry Number.

2408-99-3Relevant articles and documents

Synthesis of sulfanilamido-naphthoquinones as potential antituberculous agents

Osman,Abdalla,Alaib

, p. 68 - 71 (2007/10/02)

p-Aminobenzoic acid, the acid hydrazides of benzoic acid, salicylic acid and isonicotinic acid, and 4,4'-diaminodiphenyl sulfone were condensed with p-aminobenzenesulfonyl chloride to give the corresponding N1-substituted sulfanilamides. These molecules were then treated with 1,4-naphthoquinone to yield 2-substituted-1,4-naphthoquinones. The partition coefficient for the substituted quinones showed, in some cases, high diffusion rates to the organic phase, benzene, from physiological Tyrode's solution. These compounds are effective in low concentration in dioxane against the human sensitive strain of Mycobacterium tuberculosis H37 Rv. Sulfanilamides obtained from p-aminosalicylic acid and thiosemicarbazide failed to react with 1,4-naphthoquinone. These sulfanilamides also showed high activity against the same Mycobacterium.

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