CS
Chitosan
Glass Transition (Tg)
~203 °C
Melting Point (Tm)
— (decomposes)
Density
1.35–1.40 g/cm³
CAS Number
9012-76-4
Recycling Code
None
Category
Natural
Repeat Unit
–[C₆H₁₁O₄N]ₙ– (β-1,4)
The repeating unit is the smallest structural fragment whose repetition builds the whole chain. Subscripts show the relative share of each unit in copolymers.
Key Properties
Derived from crustacean shells; the only common cationic natural polysaccharide, which drives its antibacterial activity and mucoadhesion; soluble only in acidic media.
Applications
Wound dressings, drug delivery, water treatment flocculant, food coatings.