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Phosphoric acid is a colorless, odorless inorganic acid commonly used in food processing and various industrial applications. It is produced through the reaction of phosphorus pentoxide with water and is known for its ability to act as an acidulant, a flavoring agent, and a pH adjuster. In food applications, food-grade phosphoric acid is utilized to enhance flavor and preserve products, while technical-grade phosphoric acid is often employed in manufacturing processes and as a cleaning agent.
| Chemical formula | H3PO4 |
| Purity levels | Food grade (≥ 85%) and technical grade (≥ 75%) |
| Appearance | Colorless liquid or crystalline solid |
| Density | 1.57 g/cm³ |
| Boiling point | 158 °C (316 °F) |
When selecting phosphoric acid, buyers should consider the intended application, specifying whether food-grade or technical-grade is required. It is important to inquire about purity levels and any relevant certifications for food safety. Additionally, buyers should clarify the required quantities and packaging options, as these can vary significantly based on usage.
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Food-grade phosphoric acid is safe for consumption and meets specific safety standards, while technical-grade is intended for industrial use.
It is used as an acidulant, flavor enhancer, and preservative in various food products.
Yes, when used in appropriate concentrations and as per regulatory guidelines, food-grade phosphoric acid is considered safe.
It should be stored in a cool, dry place away from incompatible substances, in properly labeled containers.
Yes, it is commonly used in cleaning agents for its ability to remove rust and mineral deposits.
Wear appropriate personal protective equipment, including gloves and goggles, and ensure proper ventilation.