chemechemi

5-Bromo-1-pentene (CAS 1119-51-3 ) is a bromine-containing organic compound. Its molecule contains both an active bromine atom and a carbon-carbon double bond, resulting in high reactivity. It is widely used in organic synthesis, pharmaceutical intermediates, agrochemical raw materials, and the preparation of specialty chemicals. This compound serves as an important starting material for the synthesis of nitrogen-containing heterocycles, alcohols, esters, and other fine chemicals. It also has applications in polymer material modification and surface functionalization. Pharmaceutical intermediates : used in the synthesis of antibacterial drugs, antiviral drugs, and other active molecules Agrochemicals: important intermediates for the synthesis of pesticides, herbicides, and other products Polymer materials: used for monomer modification of functional polymers Fine chemicals: used in the synthesis of surfactants, flavors, and fragrances, and specialty chemicals High purity (≥98%), stabl...

Polyethyleneimine (PEI, CAS 9002-98-6 ) is a high-molecular-weight organic amine compound containing numerous primary, secondary, and tertiary amine groups within its molecular chain, exhibiting extremely high cationic density and reactivity. Based on its molecular structure, polyethyleneimine is classified into two types: linear ( L-PEI ) and branched (B-PEI), each suitable for different industrial and scientific applications. PEI is widely used in papermaking, textiles, wastewater treatment, metal chelation, coating dispersion, gene transfer vectors, and nanomaterial surface modification. It is a functional polymer material with extremely wide applications. Paper Industry: Used as a wet and dry strength agent to improve paper strength and durability Water Treatment: Cationic flocculant for removing suspended solids, heavy metals, and oil Textile Industry: Improves dye adsorption and color fastness Metal Chelation and Anticorrosion: Forms stable complexes with heavy metal ions Coati...