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Benzoic acid, 3,3'-carbonylbis-, also known as 4,4'-carbonyldibenzoic acid or phthalic anhydride, is an organic compound with the chemical formula C14H8O5. It is a white crystalline solid that is widely used in the production of various chemicals, including dyes, pharmaceuticals, and plastics. Benzoic acid, 3,3'-carbonylbis- is formed by the condensation of two benzoic acid molecules through their carboxyl groups, resulting in a carbonyl bridge between the two benzene rings. It is an important intermediate in the synthesis of various chemicals and is also used as a reagent in organic synthesis.

4480-11-9

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4480-11-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4480-11-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,8 and 0 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4480-11:
(6*4)+(5*4)+(4*8)+(3*0)+(2*1)+(1*1)=79
79 % 10 = 9
So 4480-11-9 is a valid CAS Registry Number.

4480-11-9Relevant academic research and scientific papers

Photochemistry of Meta-Substituted and Para-Substituted Aromatic Polycarbonyl Compounds

Ito, Yoshikatsu,Kawatsuki, Nobuhiro,Giri, Brij Pal,Yoshida, Masahiro,Matsuura, Teruo

, p. 2893 - 2904 (2007/10/02)

Spectroscopic (λmax and ET) and photochemical (quantum yield of benzocyclobutenol formation ΦCB and Stern-Volmer quenching constant with diene KSV) properties for meta-substituted polyketones 1b-f, 2, and 5b, pa

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