21905-92-0 Usage
General Description
N,N,N',N'-Tetraphenylmethylenediamine, also known as Tetraphenylmethylenediamine or TPMDA, is a chemical compound used as a thermal stabilizer in the production of polyurethane foam and in the formation of other organic materials. It is a white to pale yellow crystalline powder with a melting point of 148-150°C and is insoluble in water but soluble in organic solvents. TPMDA acts as an antioxidant and is added to polyurethane formulations to prevent degradation from heat, light, and oxygen exposure during the production process and in the final product. It is also used as a precursor in the synthesis of other organic compounds. TPMDA should be handled with care and proper safety measures as it may cause skin and eye irritation, and its dust can be harmful if inhaled.
Check Digit Verification of cas no
The CAS Registry Mumber 21905-92-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,0 and 5 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21905-92:
(7*2)+(6*1)+(5*9)+(4*0)+(3*5)+(2*9)+(1*2)=100
100 % 10 = 0
So 21905-92-0 is a valid CAS Registry Number.
21905-92-0Relevant articles and documents
Bridging amines with CO2: Organocatalyzed reduction of CO2 to aminals
Frogneux, Xavier,Blondiaux, Enguerrand,Thuéry, Pierre,Cantat, Thibault
, p. 3983 - 3987 (2015/11/11)
The four-electron reduction of CO2 in the presence of secondary aromatic amines is described for the first time to access aminals. Under metal-free hydrosilylation conditions, the four C-O bonds of CO2 are cleaved, and the organocatalysts are able to balance the reactivity of CO2 to promote the selective formation of two C-N and two C-H bonds. The methodology enables the formation of various symmetrical and unsymmetrical aminals.
Process for preparing N,N,N',N'-tetraphenyldiaminomethane
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, (2008/06/13)
N,N,N',N'-tetraphenyldiaminomethane, antioxidant for rubber, is prepared by reaction of 2 molar proportions of diphenylamine and 0.8-1.3 molar proportions of formaldehyde at room temperature. The reaction may be carried out in a storage container, for example a thermoplastic container which, holding the tetraphenyldiamonomethane, can be added to and will blend into a rubber mix.
