Here is a list of 100 food-grade chemicals or chemicals commonly used in the food industry along with their common applications or uses:

1. Acetic acid: Food preservative and flavor enhancer.
2. Acetylated distarch adipate: Stabilizer and thickener in food products.
3. Agar: Gelling agent and vegetarian alternative to gelatin.
4. Ascorbic acid (Vitamin C): Antioxidant and preservative.
5. Benzoin: Flavoring agent and natural preservative.
6. Benzoic acid: Preservative in acidic food products.
7. Beta-carotene: Natural food colorant and source of vitamin A.
8. Calcium carbonate: Antacid and nutrient supplement.
9. Calcium chloride: Firming agent and preservative.
10. Calcium propionate: Mold inhibitor in baked goods.
11. Caramel color: Food coloring and flavoring agent.
12. Carrageenan: Stabilizer and thickener in dairy products and desserts.
13. Citric acid: Acidulant and flavor enhancer.
14. Dextrose: Sweetener and source of carbohydrate.
15. Disodium inosinate: Flavor enhancer in savory food products.
16. Ethyl vanillin: Artificial vanilla flavoring.
17. Guar gum: Thickener and stabilizer in food products.
18. High fructose corn syrup: Sweetener and flavor enhancer.
19. Lactic acid: Acidulant and flavoring agent.
20. Magnesium stearate: Lubricant and flow agent in food processing.
21. Malic acid: Acidulant and flavor enhancer.
22. Maltodextrin: Thickener, bulking agent, and sweetener.
23. Monosodium glutamate (MSG): Flavor enhancer in savory food products.
24. Natamycin: Antifungal agent in cheese and dairy products.
25. Niacinamide: Vitamin B3 supplement and nutrient fortifier.
26. Oleoresin paprika: Natural food colorant and flavoring agent.
27. Pectin: Thickener and gelling agent in jams and jellies.
28. Phosphoric acid: Acidulant and pH regulator.
29. Polydextrose: Low-calorie bulking agent and fiber source.
30. Potassium sorbate: Preservative in food and beverage products.
31. Propylene glycol: Humectant and solvent in food processing.
32. Riboflavin (Vitamin B2): Vitamin supplement and food colorant.
33. Saccharin: Artificial sweetener.
34. Sodium benzoate: Preservative in acidic food products.
35. Sodium bicarbonate: Leavening agent and pH regulator.
36. Sodium carboxymethyl cellulose (CMC): Thickener and stabilizer in food products.
37. Sodium metabisulfite: Antioxidant and preservative.
38. Sodium nitrate: Preservative and curing agent in meat products.
39. Sodium saccharin: Artificial sweetener.
40. Sorbic acid: Preservative in food and beverages.
41. Soy lecithin: Emulsifier and stabilizer in food products.
42. Sucralose: Artificial sweetener.
43. Tartaric acid: Acidulant and flavor enhancer.
44. Titanium dioxide: Food colorant and whitening agent.
45. Tocopherol (Vitamin E): Antioxidant and nutrient fortifier.
46. Vanillin: Artificial vanilla flavoring.
47. Xanthan gum: Thickener and stabilizer in food products.
48. Yeast extract: Flavoring agent and source of nutrients.
49. Alpha-tocopherol (Vitamin E): Antioxidant and nutrient fortifier.
50. Amylase: Enzyme used in baking and brewing processes.
51. Annatto: Natural food coloring derived from seeds of the achiote tree.
52. Aspartame: Artificial sweetener.
53. Beta-glucan: Soluble fiber used in food products for its health benefits.
54. Calcium ascorbate: Vitamin C supplement and antioxidant.
55. Calcium phosphate: Nutrient supplement and food fortifier.
56. Canthaxanthin: Food colorant used to enhance the color of poultry and seafood.
57. Carrageenan-processed Eucheuma seaweed: Gelling agent in dairy products and desserts.
58. Cellulose gum: Thickener and stabilizer in food products.
59. Chlorophyll: Natural green pigment used as a food coloring.
60. Choline chloride: Essential nutrient and feed additive.
61. Copper gluconate: Nutrient supplement and food fortifier.
62. Cysteine: Dough conditioner and flavor enhancer.
63. Dextrin: Binder and coating agent in food processing.
64. Dicalcium phosphate: Nutrient supplement and food fortifier.
65. Erythorbic acid: Antioxidant and preservative.
66. Ferrous fumarate: Iron supplement and food fortifier.
67. Folic acid: Vitamin B9 supplement and food fortifier.
68. Gamma-aminobutyric acid (GABA): Flavor enhancer and natural calming agent.
69. Gelatin: Gelling agent in desserts, gummy candies, and marshmallows.
70. Gellan gum: Gelling agent and stabilizer in food products.
71. Glucose oxidase: Enzyme used in food processing to improve shelf life.
72. Glycine: Flavor enhancer and nutrient supplement.
73. Green tea extract: Antioxidant and natural flavoring agent.
74. Guarana extract: Natural source of caffeine and flavoring agent.
75. Invert sugar: Sweetener and moisture-retaining agent.
76. Iron pyrophosphate: Iron supplement and food fortifier.
77. Lactase: Enzyme used to break down lactose in dairy products.
78. Lecithin: Emulsifier and texture modifier in food products.
79. Licorice extract: Natural flavoring agent and herbal supplement.
80. Linoleic acid: Essential fatty acid and nutrient fortifier.
81. Lutein: Natural pigment and antioxidant.
82. Lycopene: Natural red pigment and antioxidant.
83. Maltitol: Sugar alcohol used as a sugar substitute.
84. Manganese sulfate: Nutrient supplement and food fortifier.
85. Methyl cellulose: Thickener and stabilizer in food products.
86. Nisin: Natural antimicrobial agent used as a preservative.
87. Omega-3 fatty acids: Nutrient supplement derived from fish or plant sources.
88. Panthenol (Vitamin B5): Nutrient fortifier and moisturizing agent.
89. Papain: Enzyme used as a meat tenderizer and digestive aid.
90. Pectinase: Enzyme used in fruit juice clarification and wine making.
91. Peppermint oil: Natural flavoring agent and digestive aid.
92. Phytosterols: Cholesterol-lowering compounds used as a food additive.
93. Polyglycerol polyricinoleate (PGPR): Emulsifier in chocolate and confectionery products.
94. Polysorbate 80: Emulsifier and stabilizer in food and beverage products.
95. Potassium bicarbonate: Leavening agent and pH regulator.
96. Potassium iodide: Nutrient supplement and food fortifier.
97. Psyllium husk: Dietary fiber used as a laxative and thickener.
98. Pyridoxine hydrochloride (Vitamin B6): Nutrient supplement and food fortifier.
99. Resveratrol: Antioxidant and natural compound found in grapes and berries.
100. Riboflavin-5′-phosphate (Vitamin B2): Nutrient supplement and food fortifier.

Please note that this list includes a wide range of food-grade chemicals commonly used in the food industry. The specific usage and regulatory requirements for these chemicals may vary depending on the country and application.