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4,4'-Methyldiphthalamide, also known as 4,4'-methylenebis(N,N-dimethylphthalamide), is a chemical compound with the molecular formula C18H18N2O4. It is a white crystalline solid that is soluble in organic solvents such as ethanol and acetone. 4,4'-methyldiphthalamide is primarily used as a flame retardant in various materials, including plastics, textiles, and coatings, due to its ability to slow down the spread of flames and reduce the heat release rate. It is also known for its high thermal stability and low toxicity, making it a preferred choice in many applications. The compound is synthesized by reacting phthalic anhydride with dimethylamine and formaldehyde, and it is characterized by its two phthalamide groups connected by a methylene bridge.

6889-33-4

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6889-33-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 6889-33-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,8,8 and 9 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 6889-33:
(6*6)+(5*8)+(4*8)+(3*9)+(2*3)+(1*3)=144
144 % 10 = 4
So 6889-33-4 is a valid CAS Registry Number.

6889-33-4Relevant academic research and scientific papers

Fluorescent hexaaryl- and hexa-heteroaryl[3]-radialenes: Synthesis, structures, and properties

Avellaneda, Antonio,Hollis, Courtney A.,He, Xin,Sumby, Christopher J.

, p. 71 - 80 (2012/04/10)

The syntheses of three new [3]radialenes - hexakis(3, 5-dimethylpyrazolyl)- , hexakis(3-cyanophenyl)-, and hexakis(3, 4-dicyanophenyl)[3]radialene (1-3) - are reported. Compound 3 is obtained in five steps with an excellent yield of 76% in the key step. C

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