Factory Direct 99% Ultra-Pure Calcium Hydroxide Engineered for Precision

• Customization: Available
• CAS No.: 1305-62-0
• Formula: Ca(Oh)2
• EINECS: 215-137-3
• Appearance: Powder
• Grade Standard: Industrial Grade
• Raw Material: Limestone
• Used for: Architectural Paint
• Purity: up to 99.5%
• Size: Less 70 Micron
• Type: Hydrated Lime
• Transport Package: 25kg/Bag, 36bags/Pallet or 900kg/Jumbo Bag Package
• Specification: 25kg/bag or 900kg/jumbo bag
• Trademark: Hongyu
• Origin: Jiangsu, China
• Production Capacity: 100000tons /Year

Product Description

99% Ultra-Pure Calcium Hydroxide – Engineered for Precision

Specially developed for industries that require the highest purity standards, our 99% ultra-pure calcium hydroxide is ideal for pharmaceutical, catalyst, and electronic applications. With extremely low levels of magnesium, iron, and silicon, it ensures stable chemical performance and meets stringent technical requirements.

Specification

Product Information

CAS Number: 1305-62-0
Molecular Formula: Ca(OH)2
Molecular Weight: 74.09 g/mol
Appearance: White or off-white odorless powder
Synonyms: Slaked Lime, Hydrated Lime, Pickling Lime, Calcium Dihydroxide

Product Overview
Calcium Hydroxide, commonly known as slaked lime or hydrated lime, is a white, odorless powder with the chemical formula Ca(OH)2. Produced through the hydration of calcium oxide (quicklime), it is renowned for its strong alkaline properties and versatility across various industries.

Key Features

High Purity: Food-grade calcium hydroxide boasts a purity level of ≥98%, ensuring suitability for sensitive applications.
Fine Particle Size: Typically processed to pass through a 325-mesh sieve, resulting in a superfine powder that enhances reactivity and dispersion.
Low Impurities: Stringent refining processes reduce heavy metals and other contaminants to meet international food safety standards.
Stable pH: Exhibits a consistent pH of approximately 12.4 in a 1% aqueous solution, making it effective for pH adjustment applications.

Technical Specifications

Parameter	Specification	Paramater	Specification
Purity (Ca(OH)2)	≥ 95.0%	Fe	≤ 0.05
Calcium Oxide (CaO)	Approximately 73.0%	Moisture Content	≤ 0.12%
Calcium Carbonate (CaCO3)	≤ 1.7%	pH (1% solution at 25°C)	12.4–12.6
Magnesium Oxide (MgO)	≤ 0.35%	Density	2.24 g/cm³
Acid Insoluble Matter	≤ 0.1%	Solubility	Slightly soluble in water; soluble in glycerol and acids; insoluble in alcohol
Heavy Metals (as Pb)	≤ 0.002%	Mesh Size	≥ 95% passing 325 mesh

Product Application

Calcium hydroxide, also known as hydrated lime, is widely used across various industries due to its strong alkalinity, reactivity, and purity. It plays a key role in environmental treatment, such as wastewater neutralization and heavy metal removal. In flue gas desulfurization, it serves as an effective sorbent for SO2 control in power plants and industrial boilers. The construction industry uses it in the formulation of mortar, lime plaster, and as a cement additive. In the chemical sector, it is used for producing calcium salts, petroleum additives, and rubber processing agents. Food-grade calcium hydroxide (E526) is also applied in the food industry as a pH regulator for products like candies and beverages. Additionally, ultra-high purity grades are used in electronic applications, including high-end chemical synthesis and slurry formulations.

After Sales Service

Technical Support and Training
Quality Assurance and Feedback Mechanism
Equipment Maintenance and Spare Parts Supply
Prompt Response Mechanism

Company Profile

CHANGSHU HONGYU CALCIUM Co., Ltd.

Changshu Hongyu Calcium Co., Ltd., a specialized manufacturer of high-purity calcium compounds based in Jiangsu, China. With over 40 years of experience, we have established ourselves as a reliable supplier of calcium oxide, calcium hydroxide, and nano calcium carbonate, serving various industries including pharmaceuticals, food processing, cosmetics, and chemical manufacturing.

Why Choose Us?

Factory Advantage

We offer 24/7 online technical support.
Our in-house laboratory conducts comprehensive testing of calcium-based products to ensure consistency and purity.
Fast shipping & customs clearance support
Customized production and dosing plans are available upon request.

High-Purity Raw Materials
Advanced Production Technology
Customized Solutions
Strict Quality Control
Professional Technical Support

Packing & Delivery

Available Packaging Options:

Shipping & Handling:

25kg PP woven bags with inner plastic liner
Suitable for small-scale users, easy to handle and use.
500kg – 1000kg jumbo bags (FIBCs)
Ideal for bulk industrial customers, cost-effective and efficient.
Custom packaging available
We can provide moisture-proof, ventilated, or palletized packaging based on customer requirements.

All packaging is designed to be moisture-resistant and secure for long-distance transportation.
Products can be palletized for container loading upon request.
We support FCL, LCL, and flexible delivery terms depending on order volume.

Certifications

FAQ

Q&A
Q: Are you a trading company or a factory?

A: We are factory.

Q: What is your main product? 
A:Calcium oxide, calcium hydroxide

Q: How do you control the quality?
A: Our factory is equipped with professional technicians to control quality, out inspectors take sample for testing every 2 hours to ensure the quality of our production. We also accept BV, SGS or any other Third-party inspection.

Q: How long time you can make the shipping?
A: We can make the shipping within 7 days after confirming the order.

Q: Where is your factory located? How can I visit the factory? 
A: Our factory located in changshu jiangsu .Welcome to visit at any time, we can pick up the nearby machine factory.