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118724-00-8

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118724-00-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 118724-00-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,7,2 and 4 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 118724-00:
(8*1)+(7*1)+(6*8)+(5*7)+(4*2)+(3*4)+(2*0)+(1*0)=118
118 % 10 = 8
So 118724-00-8 is a valid CAS Registry Number.

118724-00-8Downstream Products

118724-00-8Relevant articles and documents

Reactions of Unsaturated Azides, 8. - Azidobutatriene and Azidobutenynes

Banert, Klaus

, p. 1175 - 1178 (2007/10/02)

When 1-azido-4-chloro-2-butyne (11), obtained from 1,4-dichloro-2-butyne (10), is treated with sodium hydroxide in methanol, 4-ethynyl-1H-1,2,3-triazole (19) is the main product besides the two triazoles 9 and 21.On the way from 11 to 19 and 21 azidobutatriene (14) most probably acts as a short-lived intermediate leading to five-membered heterocyclic compounds as azidoallenes do.In contrast to 14, the azidobutenynes 23 and 27 are relatively stable.They mainly give 2H-azirines (24, 28) on thermolysis and photolysis. - Keywords: Azidobutatriene, ring closure of; Triazole, preparation via azidobutatriene; Azirines

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