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135085-90-4

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135085-90-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 135085-90-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,0,8 and 5 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 135085-90:
(8*1)+(7*3)+(6*5)+(5*0)+(4*8)+(3*5)+(2*9)+(1*0)=124
124 % 10 = 4
So 135085-90-4 is a valid CAS Registry Number.

135085-90-4Relevant articles and documents

AN IMPROVED PROCEDURE FOR THE PREPARATION OF 2-HALO-1,3- AND -1,4-DIETHYNYLBENZENES AND THEIR OXIDATIVE POLYMERIZATION. SYNTHESIS AND CHARACTERIZATION OF THE CORRESPONDING POLYMERS VIA OXIDATIVE POLYMERIZATION

Chimenti, Franco,Bolasco, Adriana,Manna, Fedele,D'Ilario, Lucio,Ortaggi, Giancarlo

, p. 515 - 518 (2007/10/02)

The paper describes a rapid and convenient route for the preparation of 2-halo-1,3- and -1,4-diethynylbenzenes (halogen = Cl, Br, I) starting from 2-nitro-1,3- and -1,4-diacetylbenzenes.The compounds are sensitive to light and decompose easily.Their preparation opens the way to the synthesis of widely substituted poly-(diethynylbenzene)-type polymers.Some were prepared and characterized for their stability and electrical properties, and the influence of halo-substituents examined.

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