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153931-81-8

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153931-81-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 153931-81-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,3,9,3 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 153931-81:
(8*1)+(7*5)+(6*3)+(5*9)+(4*3)+(3*1)+(2*8)+(1*1)=138
138 % 10 = 8
So 153931-81-8 is a valid CAS Registry Number.

153931-81-8Upstream product

153931-81-8Downstream Products

153931-81-8Relevant articles and documents

Polycyclic Pyridazines. II. Synthesis of Pyrazolopyridopyridazine Derivatives from Dimethyl Pyrazolopyridazine-5,6-dicarboxylates as the Key Intermediates

Tominaga, Yoshinori,Luo, Jiann-Kuan,Castle, Lyle W.,Castle, Raymond N.

, p. 267 - 273 (2007/10/02)

The synthesis of the novel pyrazolopyridopyridazine ring system and some of its derivatives has been accomplished such as 4-amino-1-phenyl-5,8-dioxo-, 4-amino-5,8-dioxo-, 1-phenyl-5,8-dioxo-, 5,8-dioxo-, 5,8-dichloro-1-phenyl-, 5-ethoxy-1-phenyl- and 8-ethoxy-1-phenylpyrazolopyridopyridazines.

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