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Low-iron calcium hydroxide (chemical formula: Ca(OH)₂), commonly known as hydrated lime or slaked lime, is a high-purity inorganic white powder with ultra-low iron impurities.It features a whiteness of over 93% and a dry-basis purity of ≥95%, with high-end specifications reaching more than 98%.Manufactured from high-quality limestone through precise calcination, hydration and refined purification processes, the product has fine and uniform texture, no caking and good fluidity. It is slightly soluble in water with a strongly alkaline aqueous solution and excellent chemical reactivity and adsorption capacity.The core advantage of low-iron calcium hydroxide lies in its extremely low iron content, which effectively prevents adverse effects of iron ions on color, stability and subsequent chemical reactions, and avoids yellowing, discoloration and side catalytic reactions. It is specially applicable to high-end fields sensitive to iron impurities.Widely used in food processing (sugar refining, bean products, beverage pH adjustment), pharmaceutical synthesis, fine chemicals, high-grade papermaking, electronic materials, premium coatings, water treatment and other industries.
| Inspection Item | Standard Requirement | Measured Result |
|---|---|---|
| Calcium Hydroxide (Ca(OH)₂) | ≥96% | 96.30% |
| Magnesium & Alkali Salts | ≤0.3% | 0.24% |
| Hydrochloric Acid Insoluble Matter | ≤0.1% | 0.06% |
| As | ≤2ppm | 0.15ppm |
| Fluoride | ≤50ppm | 7ppm |
| Pb | ≤2ppm | 0.18ppm |
| Heavy Metals | ≤10ppm | 3ppm |
| Loss on Drying | ≤1% | 0.20% |
| Fineness (300 Mesh) | 99.80% | 99.90% |
| Appearance | White Powder | Conforms |
Safety of Hydrated Lime
Properties and Potential Risks: Hydrated lime is corrosive. Its aqueous solution is strongly alkaline, with a pH value ranging from 12 to 13.5. Direct skin contact can cause skin defatting and dryness, leading to symptoms such as redness, swelling, and burns. If it gets into the eyes, it may damage the cornea and conjunctiva, potentially causing vision impairment. Inhalation of its dust can irritate the respiratory mucosa, resulting in coughing, difficulty breathing, and other discomforts.
Safe Operation Guidelines: The risks can be effectively minimized by following safety operation procedures. When handling hydrated lime, it is essential to wear protective equipment, including rubber gloves, safety goggles, dust masks, and protective clothing, to prevent skin and eye contact as well as inhalation of dust. During transportation, handle the packages with care to avoid damage and powder leakage. For storage, place hydrated lime in a cool, dry, and well - ventilated warehouse, keeping it away from fire sources, heat sources, acids, and food chemicals to prevent mixing storage.
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Certifications
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Packaging and Transportation
Packaging：We use plastic-woven bags and ton bags with excellent moisture-proof properties. For bulk transportation, professional protective measures are implemented to prevent the product from caking due to moisture during transportation and storage, ensuring optimal usability.
Transportation：Establishing long-term partnerships with many renowned international logistics enterprises, we offer various transportation methods, including full container loads and less-than-container loads. Customers can choose trade terms such as FOB, CIF, and EXW according to their needs, ensuring safe and timely delivery worldwide.
FAQ
Q: Are you a trading company or a factory?
A: We are a factory.We have two factories and a limestone mine.
Q: What are the advantages of your products?
A: Our products have high purity and minimal impurities. The highest purity of calcium hydroxide is 99.5%.
Q: What payment methods are supported?
A: T/T、L/C、D/P.
Q: Do you have any certificates?
A: Yes, we have ISO9001 and SGS certifications, etc.
Q: Do you provide free samples?
A: Yes.
