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133638-22-9

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133638-22-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 133638-22-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,6,3 and 8 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 133638-22:
(8*1)+(7*3)+(6*3)+(5*6)+(4*3)+(3*8)+(2*2)+(1*2)=119
119 % 10 = 9
So 133638-22-9 is a valid CAS Registry Number.

133638-22-9Downstream Products

133638-22-9Relevant articles and documents

SYNTHESIS AND PROPERTIES OF PHENYLENEBIS-1H-TETRAZOLES

Gaponik, P. N.,Karavai, V. P.,Davshko, I. E.,Degtyarik, M. M.,Bogatikov, A. N.

, p. 1274 - 1278 (2007/10/02)

Heterocyclization of m- and p-phenylenediamines with orthoformic ester and sodium azide has given phenylenebis-1H-tetrazoles.Under these conditions, o-phenylenediamine gives benzimidazole. o-, m-, and p-Phenylenebis-1H-tetrazoles were also obtained from the nitroanilines via the intermediate nitro- and aminophenyltetrazoles.The reactions of the bistetrazoles examined were basic hydrolysis, aminomethylation, and complex formation with copper salts.

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