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13136-15-7

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13136-15-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13136-15-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,1,3 and 6 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 13136-15:
(7*1)+(6*3)+(5*1)+(4*3)+(3*6)+(2*1)+(1*5)=67
67 % 10 = 7
So 13136-15-7 is a valid CAS Registry Number.

13136-15-7Relevant articles and documents

Azocoupling of Quaternary 1,2,4-Triazolium Salts to Form 5-p-N,N-Dimethylaminophenylazo-1,2,4-triazolium Salts

Becker, H. G. O.,Hoffmann, Gerda,Gwan, Kim Mun,Knuepfer, L.

, p. 325 - 337 (2007/10/02)

Quaternary 1,2,4-triazolium salts 1 couple easily with p-N,N-dimethylamino-benzenediazonium salts to form azodyes 3 (5-N,N-dimethylaminophenylazo-1,2,4-triazolium salts), preferably under solid-liquid phase transfer conditions using chloroform or methylene chloride and triethylamine or DABCO.Zwitterionic 1,2,4-triazolium salts (anhydro mercapto hydroxide, anhydro hydroxy hydroxide, and anhydro anilido hydroxide ("nitron")) couple as well.The azodyes - as also well known from industrially used types - absorb in the region of 500 nm and have high extinction coefficients.Substituents in 1-, 3- or 4-position of the triazolium ring exert no clear substituent effects.The quaternary 1,2,4-triazolium salts were synthesized according to standard procedures.

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