Poly(4-vinylpyridine)

Poly(4-vinylpyridine)

I. Basic Physical & Chemical Properties

Basic Identification

Full Name: Poly(4-vinylpyridine)

Abbreviation: P4VP

CAS No.: 25232-41-1

Repeat Unit Molecular Formula: (C7H7N)n

Appearance

Industrial and reagent grades are white to light yellow hygroscopic powders. The particle fineness and bulk density vary with molecular weight.

Structural & Core Characteristics

It features a carbon main chain with pendant para-pyridyl groups. The lone electron pair on nitrogen atoms of pyridine rings serves as the core functional site:

1. Weak alkalinity: Pyridyl nitrogen can be protonated with a pKa value of 4.7~5.2. Its surface charge changes with ambient pH, delivering pH responsiveness.

2. Coordination capacity: Nitrogen atoms chelate with various metal ions including copper, nickel, cobalt, palladium and platinum.

3. Intermolecular interaction: Forms hydrogen bonds and ionic complexes with acidic organics and polymers.

Solubility

Soluble in polar organic solvents such as DMF, DMSO, glacial acetic acid, methanol and ethanol;

Insoluble in low-polarity solvents including pure water, acetone, alkanes and diethyl ether.

Thermal Properties

Glass transition temperature (Tg): approx. 142℃. It tends to oxidize and discolor under high temperature, and degrades upon prolonged heating.

II. Storage, Handling & Safety Instructions

Storage: Keep tightly sealed, protected from light and stored in dry ambient temperature. Avoid moisture, strong oxidants and high temperature.

Safety: The powder generates dust easily; wear dust-proof masks during handling. Rinse thoroughly with plenty of clean water upon skin or eye contact. 

This product is irritant and inedible. Dispose of waste materials in compliance with solid chemical waste regulations.

III. Hazardous Goods Labeling

1. Hazard Classification: Irritant solid, not high-risk flammable or explosive hazardous chemical

2. Hazard Statements: H315 (Causes skin irritation), H319 (Causes serious eye irritation)

3. Precautionary Statements: Wear dust masks, goggles and solvent-resistant gloves throughout operation; avoid dust inhalation; flush with abundant water after contact.

4. Transportation Classification: Ordinary industrial solid, non-dangerous goods (non-DG), transportable by standard logistics.

5. Warning Pictograms: Skin corrosion/irritation symbol, eye irritation symbol