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219904-19-5

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219904-19-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219904-19-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,0 and 4 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 219904-19:
(8*2)+(7*1)+(6*9)+(5*9)+(4*0)+(3*4)+(2*1)+(1*9)=145
145 % 10 = 5
So 219904-19-5 is a valid CAS Registry Number.

219904-19-5Downstream Products

219904-19-5Relevant articles and documents

Reactivity of some substituted 5-methyltriazolobenzothiazoles and preparation of a new tetracyclic heterocycle 5-methyl-2-phenylpyrrolotriazolobenzothiazole

Deshmukh, Manisha V.

, p. 921 - 924 (2007/10/03)

5-Methyltriazolobenzothiazole 2 has been synthesized by the condensation of 2-hydrazino-4-methylbenzothiazole 1 with formic acid. Compound 2 with N-methyaniline and formaldehyde results in Mannich base 8. The styryl derivative 11 in cis-form is obtained from 10 with anisaldehyde. A new tetracyclic system phenylpyrrolotriazolo-benzothiazole 13 is synthesized from 10 by the action of phenacyl bromide.

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