Certainly! Here is a list of major chemicals commonly used in the paper and pulp industry along with their applications or uses:

1. Wood pulp: Raw material for paper production.
2. Bleaching agents (such as chlorine dioxide, hydrogen peroxide, and sodium hypochlorite): Used to remove impurities and brighten the pulp.
3. Sodium hydroxide: Alkaline chemical used in the pulping and bleaching processes.
4. Sulfuric acid: Acid used in the pulping and bleaching processes.
5. Calcium carbonate: Filler used to improve brightness and opacity in paper.
6. Rosin: Natural resin used as a sizing agent in paper manufacturing.
7. Alum: Used as a retention aid and sizing agent in paper production.
8. Starch: Used as a binder and surface sizing agent in paper manufacturing.
9. Titanium dioxide: Pigment used to enhance whiteness and opacity in paper.
10. Cationic starch: Used as a retention aid and strengthening agent in papermaking.
11. Polyacrylamide: Used as a flocculant and retention aid in the papermaking process.
12. Sodium silicate: Used as a dispersing agent and retention aid in paper production.
13. Dyes and pigments: Used to add color and enhance printability in paper.
14. Kaolin clay: Filler and coating pigment used to improve smoothness and ink receptivity.
15. Sizing agents (such as alkyl ketene dimer and ASA emulsion): Applied to paper to control water absorption and improve print quality.
16. Defoamers: Used to control foam during papermaking.
17. Wet strength agents: Enhance the strength of paper when wet.
18. Dry strength agents: Improve the strength of paper when dry.
19. Retention aids: Aid in the retention of fine particles during paper formation.
20. Biocides: Prevent microbial growth and control the formation of slime in the papermaking process.
21. Optical brighteners: Chemicals that improve the whiteness and brightness of paper.
22. Dispersants: Improve the dispersion of fibers and fillers in the papermaking process.
23. Chelating agents: Prevent the negative effects of metal ions on paper properties.
24. Enzymes: Used for fiber modification and improving drainage and pulp properties.
25. Sodium borate: Buffering agent used in papermaking.
26. Styrene-butadiene latex: Used as a binder in paper coatings.
27. Sodium lignosulfonate: Used as a dispersing agent and water reducer in paper production.
28. Peroxide stabilizers: Used to stabilize hydrogen peroxide used in bleaching.
29. Sodium metabisulfite: Antioxidant used in pulp and paper bleaching.
30. Sodium perborate: Bleaching agent used in the production of recycled paper.
31. Fixatives: Used to set dyes and pigments in paper.
32. Quaternary ammonium compounds: Used as antistatic agents and softeners in paper production.
33. Wetting agents: Aid in the wetting and penetration of chemicals during papermaking.
34. Pitch control agents: Prevent the buildup of resinous materials in the papermaking process.
35. Retention aids: Aid in the retention of fibers, fillers, and fines during paper formation.
36. Defoamers: Control foam generated during various papermaking stages.
37. Dispersants: Aid in the dispersion of fillers and additives in the papermaking process.
38. Brighteners: Enhance the brightness and whiteness of paper.
39. Antioxidants: Prevent degradation of paper from oxidation.
40. Chelating agents: Control the presence of metal ions in the paper pulp.

Please note that the specific chemicals and their uses may vary depending on the specific papermaking processes and applications within the pulp and paper industry.