Slaked lime calcium hydroxide food grade is a purified form of calcium hydroxide, Ca(OH)₂, produced by hydrating high-purity calcium oxide and intended for use in food, beverage, and pharmaceutical applications. It appears as a soft white powder with alkaline properties and is valued for its ability to adjust pH, clarify liquids, and supply calcium without introducing heavy-metal or microbial contaminants.
What is slaked lime calcium hydroxide food grade used for?
In food processing, this ingredient is used in corn nixtamalization, sugar refining, fruit and vegetable peeling, and as a firming agent in pickles and preserves. It also serves as a processing aid in some beverages and as a calcium source in dietary supplements. Because it is alkaline, it can neutralize acids and influence texture, color, and shelf life.
How is food-grade calcium hydroxide different from industrial lime?
Food-grade calcium hydroxide must meet stricter purity standards, including limits on arsenic, lead, mercury, and other heavy metals, as well as tighter controls on particle size and solubility. Industrial lime may contain higher levels of impurities and is not intended for ingestion. Buyers should request a certificate of analysis and confirm compliance with relevant food-chemical monographs, such as FCC or E number E526 specifications.
Where can you source food-grade calcium hydroxide reliably?
Reliable supply often comes from established mineral and chemical producers, including those in China where china calcium salts are widely exported. Working with a qualified calcium manufacturer or a specialized calcium supplier helps ensure consistent quality, documentation, and lot-to-lot traceability. Ask about packaging, storage conditions, and whether the material is intended for direct food contact.
What safety precautions apply when handling it?
Calcium hydroxide is strongly alkaline and can irritate skin, eyes, and respiratory passages if dust is inhaled. Use appropriate personal protective equipment, keep the material dry, and store it away from acids and incompatible chemicals. In food applications, adhere to local regulations and use only the amount needed to achieve the intended technical effect.
常见问题
Is food-grade calcium hydroxide safe to eat?
Food-grade calcium hydroxide is permitted in many countries as a processing aid and acidity regulator when used according to good manufacturing practices. It is not meant to be consumed in large amounts directly, but residues in finished foods are typically minimal. Always follow local food regulations and product specifications.
What is the difference between slaked lime and hydrated lime?
Slaked lime and hydrated lime are common names for the same chemical, calcium hydroxide. The term 'slaked' often refers to the reaction of quicklime with water, while 'hydrated' describes the resulting product. For food use, the material must meet food-grade purity standards.
How should food-grade calcium hydroxide be stored?
Store it in a cool, dry, well-ventilated area in tightly sealed containers to prevent reaction with moisture and carbon dioxide. Keep it away from acids and incompatible materials. Proper storage helps maintain product quality and reduces caking or contamination risks.
