Astringents

1. ASTRINGENTS

2. “Brings about protein
precipitation.”
E.g.: Alum

3. Uses
For Styptic action
Anti inflammatory
Anti perspirant
Anti microbial
To remove unwanted skin

4. MOP:
1. From Alunite or bauxite
2. By mixing conc. potassium sulphate
to aluminum sulphate
Alum
KAlSO4 .12H2O

5. Physical Properties:
• Colorless granular crystalline powder
• Odourless
• Sweet astringent taste
• soluble in water
• Soluble in glycerin
• Insoluble in alcohol
• Aqueous solution is acidic in nature

6. Uses
• Topical agent
• Astringents
• Preparation of toxoids
• Antiseptics
• Local styptic action

7. Storage
“ It should be stored in well
closed container at a cool
place.”

8. ZnSO4
MOP:
1) By heating zinc sulphate in air
ZnS + 2O2 ZnSO4
2) Mixing zinc with sulphuric acid
Zn + H2SO4 ZnSO4 + H2
Zinc sulphate

9. Physical Properties:
• Colorless powder
• Odorless
• Astringent taste
• Very soluble in water
• Very soluble in glycerin
• Insoluble in alcohol
• Aqueous solution is acidic in nature

10. Chemical Properties
When it is strongly heated it
decomposes

11. Uses
• Topical agent
• Astringents
• Mild germicidal
• Emetic
• Local styptic action
• Preparation of bandages and adhesive
tapes

12. Storage
“ It should be stored in well
closed container at a cool
place.”