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139260-31-4

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139260-31-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139260-31-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,2,6 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139260-31:
(8*1)+(7*3)+(6*9)+(5*2)+(4*6)+(3*0)+(2*3)+(1*1)=124
124 % 10 = 4
So 139260-31-4 is a valid CAS Registry Number.

139260-31-4Relevant articles and documents

Synthesis of Perylene-3,4-dicarboximides - Novel Highly Photostable Fluorescent Dyes

Feiler, Leonhard,Langhals, Heinz,Polborn, Kurt

, p. 1229 - 1244 (2007/10/02)

Perylene-3,4-dicarboximides 2 are obtained by a decarboxylizing condensation of moderately sterically hindered primary amines with perylene-3,4,9,10-tetracarboxylic 3,4:9,10-bisanhydride (3) in the presence of water.Perylene-3,4-dicarboxylic anhydride (4) is prepared by hydrolysis of the imides with KOH in tert-butyl alcohol.The anhydride may be condensed with any primary amine to the corresponding imide.The imides are highly fluorescent and very photostable dyes. - Key Words: Fluorescent dyes/Pigments/Perylenes/Carboximides

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