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139933-81-6

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139933-81-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139933-81-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,9,3 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139933-81:
(8*1)+(7*3)+(6*9)+(5*9)+(4*3)+(3*3)+(2*8)+(1*1)=166
166 % 10 = 6
So 139933-81-6 is a valid CAS Registry Number.

139933-81-6Upstream product

139933-81-6Downstream Products

139933-81-6Relevant articles and documents

Thermolyses of 1,1-dimethyl-2-pyrazolinium fluoborates - Evidence for spiro--1-aza-1,4,6-octatrienyl cation

Subramaniam, Girija,Fishel, Derry L

, p. 172 - 176 (2007/10/02)

Thermolyses of 3-aryl-1,1-dimethyl-2-pyrazolinium fluoborates give an isomeric mixture of 3-aryl-1-methylpyrazole and 5-aryl-1-methylpyrazole as major products in complete contrast to the corresponding acyclic analogs. 2,6-Diaryl-3-methylpyridines were isolated only in trace quantities.The probable reasons for this unique behaviour was explored using semi-empirical calculations, non-kinetic methods and radiolabelling experiments.A pathway was proposed.

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