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Diphosphoric acid, P,P'-diphenyl ester, also known as diphenyl diphosphate or Ph2P(O)OP(O)Ph2, is an organophosphorus compound characterized by the presence of two phenyl groups attached to a central diphosphoric acid moiety. This colorless, crystalline solid is a valuable intermediate in the synthesis of various organophosphorus compounds, including flame retardants, pesticides, and pharmaceuticals. It is typically synthesized through the reaction of phosphorus pentoxide with diphenyl phosphite, and its chemical structure features two phosphorus atoms bonded to oxygen atoms, with the phenyl groups attached to the phosphorus centers. Diphenyl diphosphate is known for its thermal stability and is used in the preparation of other organophosphorus derivatives, making it an important building block in the chemical industry.

1231-03-4

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1231-03-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1231-03-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,2,3 and 1 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1231-03:
(6*1)+(5*2)+(4*3)+(3*1)+(2*0)+(1*3)=34
34 % 10 = 4
So 1231-03-4 is a valid CAS Registry Number.

1231-03-4Downstream Products

1231-03-4Relevant academic research and scientific papers

One-pot Synthesis of Acid Anhydrides from Acids Using N,N,N',N'-Tetramethylchloroformamidinium Chloride under Mild Conditions

Fujisawa, Tamotsu,Tajima, Kazuhisa,Sato, Toshio

, p. 3529 - 3530 (2007/10/02)

N,N,N',N'-Tetramethylchloroformamidinium chloride reacted smoothly with a variety of carboxylic and phosphoric acids in the presence of a tertiary amine to give the corresponding acid anhydrides in high yields.

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