Welcome to LookChem.com Sign In|Join Free

CAS

  • or

25778-04-5

Post Buying Request

25778-04-5 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

25778-04-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 25778-04-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,7,7 and 8 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 25778-04:
(7*2)+(6*5)+(5*7)+(4*7)+(3*8)+(2*0)+(1*4)=135
135 % 10 = 5
So 25778-04-5 is a valid CAS Registry Number.

25778-04-5Relevant articles and documents

Transformation of one of two C≡N groups of o-dicyanobenzene in the presence of cyanoguanidine. Crystal and gas-phase structure of 2-(2′-cyanophenyl)-4,6-diamino-1,3,5-triazine

Janczak, Jan,Kubiak, Ryszard

, p. 60 - 69 (2005)

The transformation of one C≡N group in o-dicyanobenzene in the presence of cyanoguanidine yielding the melaminium derivative in crystalline form has been performed. In the final step of the closing of 1,3,5-triazined ring both hydrogen atoms of one amine

LOW-ENERGY CONSUMPTION PROCESS WITH REDUCED AMMONIA CONSUMPTION, FOR THE PRODUCTION OF HIGH-PURITY MELAMINE THROUGH THE PYROLYSIS OF UREA, AND RELATIVE PLANT

-

Paragraph 0103-0123, (2020/02/13)

A process is described, having a low-energy consumption and reduced ammonia consumption for the production of high-purity melamine, through the pyrolysis of urea, and the relative plant.

Prebiotic Origin of Pre-RNA Building Blocks in a Urea “Warm Little Pond” Scenario

Menor Salván,Bouza, Marcos,Fialho, David M.,Burcar, Bradley T.,Fernández, Facundo M.,Hud, Nicholas V.

, p. 3504 - 3510 (2020/10/02)

Urea appears to be a key intermediate of important prebiotic synthetic pathways. Concentrated pools of urea likely existed on the surface of the early Earth, as urea is synthesized in significant quantities from hydrogen cyanide or cyanamide (widely accepted prebiotic molecules), it has extremely high water solubility, and it can concentrate to form eutectics from aqueous solutions. We propose a model for the origin of a variety of canonical and non-canonical nucleobases, including some known to form supramolecular assemblies that contain Watson-Crick-like base pairs.The dual nucleophilic-electrophilic character of urea makes it an ideal precursor for the formation of nitrogenous heterocycles. We propose a model for the origin of a variety of canonical and noncanonical nucleobases, including some known to form supramolecular assemblies that contain Watson-Crick-like base pairs. These reactions involve urea condensation with other prebiotic molecules (e. g., malonic acid) that could be driven by environmental cycles (e. g., freezing/thawing, drying/wetting). The resulting heterocycle assemblies are compatible with the formation of nucleosides and, possibly, the chemical evolution of molecular precursors to RNA. We show that urea eutectics at moderate temperature represent a robust prebiotic source of nitrogenous heterocycles. The simplicity of these pathways, and their independence from specific or rare geological events, support the idea of urea being of fundamental importance to the prebiotic chemistry that gave rise to life on Earth.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 25778-04-5