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m-Chlorophenylphosphonous dichloride is an organophosphorus compound with the chemical formula C6H4Cl3P. It is a colorless to pale yellow liquid that is soluble in organic solvents. m-chlorophenylphosphonous dichloride is an important intermediate in the synthesis of various organophosphorus compounds, such as pesticides, flame retardants, and pharmaceuticals. It is also used as a reagent in organic synthesis, particularly in the formation of carbon-phosphorus bonds. Due to its reactivity, it is essential to handle m-chlorophenylphosphonous dichloride with care, as it can be toxic and may pose risks to human health and the environment.

1718-21-4

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1718-21-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1718-21-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,1 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1718-21:
(6*1)+(5*7)+(4*1)+(3*8)+(2*2)+(1*1)=74
74 % 10 = 4
So 1718-21-4 is a valid CAS Registry Number.

1718-21-4Relevant academic research and scientific papers

DIARYLPHOSPHINIC AZIDES. PHOTOCHEMICAL REACTIONS INCLUDING REARRANGEMENT IN METHANOL

Harger, Martin J.P.,Westlake, Sally

, p. 1511 - 1516 (2007/10/02)

On photolysis in methanol the diarylphosphinic azides Ar2P(O)N3 (Ar=phenyl, p-tolyl, p-anisyl, p-chlorophenyl) rearrange with loss of nitrogen to form (monomeric) metaphosphonimidates which are trapped by the solvent to give methyl NP-diarylphosphonamidates (7) (41-53percent).Diarylphosphinic amides (18-42percent) are also usually formed, presumably from (triplet) nitrenes.The limited evidence available suggests that the rearrangements take place directly from the photo-excited azides rather than via (singlet) nitrene intermediates.One of the products of rearrangement, methyl NP-di(p-chlorophenyl)phosphonamidate, suffers extensive photochemical dechlorination giving methyl N-phenyl-P-p-chlorophenylphosphonamidate.

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