143643-89-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143643-89-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,6,4 and 3 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 143643-89:
(8*1)+(7*4)+(6*3)+(5*6)+(4*4)+(3*3)+(2*8)+(1*9)=134
134 % 10 = 4
So 143643-89-4 is a valid CAS Registry Number.
143643-89-4Relevant articles and documents
1,2,4-Triazolium salts from the reaction 1-aza-2-azoniaallene salts with nitriles
Wang,Jochims,Kohlbrandt,Dahlenburg,Al-Talib,Hamed,Ismail
, p. 710 - 718 (1992)
Aryl- and alkylhydrazones 1 of alkyl ketones and propanal are transformed to 1-chloroalkylazo compounds 2 with tert-butyl hypochlorite. Compounds 2 react with antimony(V) chloride or aluminum(III) chloride to give 1-aza-2-azoniaallene salts 3 as reactive
