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171195-81-6

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171195-81-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 171195-81-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,1,1,9 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 171195-81:
(8*1)+(7*7)+(6*1)+(5*1)+(4*9)+(3*5)+(2*8)+(1*1)=136
136 % 10 = 6
So 171195-81-6 is a valid CAS Registry Number.

171195-81-6Relevant articles and documents

Reactions of benzotriazolo[2,1-a]benzotriazole derivatives. 1. Synthesis of new insensitive high-density energetic compounds

Subramanian,Boyer,Buzatu,Stevens,Trudell

, p. 6110 - 6113 (1995)

The sequential preference of electrophilic attack on the dibenzotetraazapentalene ring system 6 has unequivocally been shown to be in the order of position 2(8) > 4(10) >> 1(7) and 3(9). However, nucleophilic substitution reactions with sodium azide were found to be substrate dependent. Substitution occurred at the 3(9)-position of 9 followed by elimination of hydrogen chloride to give 10 while direct substitution of azide for the 4(10)-nitro group of 2 was found to yield 13. The reactivity of the dibenzotetraazapentalene derivatives toward electrophiles and nucleophiles was exploited for the synthesis of the new heterocyclic system 14H-[1,2,5]oxadiazolo[3,4-e][1,2,5]-oxadiazolo[3',4':4,5]benzotriazolo [2,1-a]benzotriazol-6-ium inner salt 1,8-dioxide (11). From this study the first of a new class of insensitive energetic materials 4 has been synthesized in a straightforward fashion from 2.

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