- O-Phenylphenol - Preservative
- Octanal - Flavoring Agent
- Octanoic Acid - Component in the Manufacture of Other Food-Grade, Additives, Defoaming Agent, Flavoring Agent
- Octyl Acetate - Flavoring Agent
- Octyl Formate - Flavoring Agent
- Octyl Gallate - Antioxidant
- Oleic Acid - Antisticking Agent, Binder, Component in the Manufacture of Other Food-Grade, Additives, Defoaming Agent, Filler, Lubricant, Plasticizer, Release Agent
- Oleoresin Black Pepper - Flavoring Agent
- Oleoresin Capsicum - Flavoring Agent
- Oleoresin Celery - Flavoring Agent
- Oleoresin Ginger - Flavoring Agent
- Oleoresin Paprika - Flavoring Agent
- Oleoresin Turmeric - Flavoring Agent
- Olibanum Oil - Flavoring Agent
- Onion Oil - Flavoring Agent
- Orange GGN - Color
- Orange Oil, Bitter, Coldpressed - Flavoring Agent
- Orange Oil, Coldpressed - Flavoring Agent
- Orange Oil, Distilled Origanum Oil, Spanish Type - Flavoring Agent
- Orris Root Oil - Flavoring Agent
- Oxidized Starch - Binder, Filler, Gelling Agent, Plasticizer, Thickener
- Oxidized Starch Polyglycerol Esters of Interesterified Ricinoleic Acid - Emulsifier, Foaming Agent, Whipping Agent
- Oxystearin - Antifoaming Agent, Defoaming Agent, Sequestrant
Food Additives - Names Starting with O
List of Additives and What They Do
By Anne Marie Helmenstine, Ph.D., About.com
Index of Food Additives
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