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857367-49-8

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857367-49-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857367-49-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,3,6 and 7 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 857367-49:
(8*8)+(7*5)+(6*7)+(5*3)+(4*6)+(3*7)+(2*4)+(1*9)=218
218 % 10 = 8
So 857367-49-8 is a valid CAS Registry Number.

857367-49-8Downstream Products

857367-49-8Relevant articles and documents

Polymerization of p-cresol, formaldehyde, and piperazine and structure of monofunctional benzoxazine-derived oligomers

Chutayothin, Papinporn,Ishida, Hatsuo

, p. 3897 - 3904 (2011)

By using a secondary amine, e g. piperazine, a Mannich base polymer, having similar structure to the traditional polybenzoxazine, is synthesized. Unlike all the reported polybenzoxazines that are colored, the white polymer shows good thermal property that is close to the degradation temperature of the polybenzoxazine derived from difunctional benzoxazine monomers. 31P NMR spectroscopy in combination with facile phosphorus derivatization and previous model compound studies are utilized to clarify the structures of piperazine-based systems as well as the main chain and end group of traditional polybenzoxazines.

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