Food grade calcium hydroxide for corn nixtamalization is a purified, high-purity alkali (E526) used to cook and steep maize, breaking down hemicellulose and improving niacin availability. It is also known as slaked lime or cal. This traditional process, called nixtamalization, transforms corn into masa for tortillas, tamales, and chips.
Why is food grade calcium hydroxide used in nixtamalization?
Food grade calcium hydroxide raises the pH of the cooking water, which softens the corn hull, gelatinizes starch, and releases bound niacin. It also improves dough texture and flavor. Unlike technical grades, food grade material meets strict purity limits for heavy metals and arsenic, making it safe for human consumption.
What should you look for in a food grade calcium hydroxide supplier?
Choose a calcium manufacturer or calcium supplier that provides a certificate of analysis (CoA) for each batch, confirming FCC or E526 compliance. Reputable sources, including many china calcium salts producers, offer consistent particle size and low iron content. Verify that the product is stored away from acids and moisture to prevent degradation.
How is food grade calcium hydroxide used in nixtamalization?
Typically, 1–2% calcium hydroxide by weight of corn is dissolved in water, then the corn is cooked and steeped overnight. The alkaline solution is drained, and the corn is washed to remove excess lime. The resulting nixtamal is ground into masa. Always follow local food safety guidelines for concentration and rinsing.
Is food grade calcium hydroxide safe to handle?
Yes, when used correctly. It is a strong alkali and can cause skin or eye irritation, so wear gloves and eye protection. Store it in a cool, dry place in sealed containers. Food grade calcium hydroxide for corn nixtamalization food grade is not intended for direct consumption without proper dilution and rinsing.
常见问题
What is the difference between food grade and technical grade calcium hydroxide?
Food grade calcium hydroxide is purified to meet strict limits for heavy metals, arsenic, and other contaminants, making it safe for human consumption. Technical grade may contain higher levels of impurities and is intended for industrial uses like water treatment or construction.
How much calcium hydroxide should I use for nixtamalization?
A common ratio is 1–2% calcium hydroxide by weight of dry corn, dissolved in enough water to cover the corn. Adjust based on your desired masa texture and local food safety recommendations, and always rinse the nixtamal thoroughly before grinding.
Can I substitute pickling lime for food grade calcium hydroxide?
Pickling lime is typically food grade calcium hydroxide, so it can be used if it is labeled as food grade and intended for culinary use. However, always check the label to ensure it meets purity standards and does not contain additives.
