How should Calcium Oxide be stored in a warehouse to maintain its quality?

Calcium Oxide must be kept in a dry, covered area with pallets raised off the floor to prevent moisture ingress from ground humidity. The material reacts with water to form calcium hydroxide and generates heat, so storing it near water sources or in damp conditions causes clumping and reduces its chemical activity. Suppliers in China often recommend inspecting the bag liners for tears before unloading, as any breach compromises the entire batch.

Where in China is Calcium Oxide production concentrated, and what types of suppliers exist?

Production is concentrated in provinces with abundant limestone reserves, such as Guangxi, Guizhou, and Shandong, where quarrying and calcination facilities are co-located. Listings may come from direct kiln operators who control the raw material and burning process, or from traders who aggregate stock from multiple plants. Distinguishing between the two matters because direct producers can offer more consistent batch tracking and specific particle size adjustments.

What specific question does an experienced buyer ask about Calcium Oxide reactivity?

An experienced buyer asks for the slaking heat value or the rate of reaction with water, as this determines the speed of hydration in the end use. High reactivity is critical for steelmaking fluxes where rapid slag formation is needed, while slower reacting grades might be preferred for certain construction applications. Without this data, a buyer cannot predict how the material will behave in their specific process environment.

What is the difference between quicklime and hydrated lime in terms of handling?

Quicklime is the calcium oxide product shipped from the kiln, which is highly reactive and dangerous if it contacts skin or eyes. Hydrated lime is the result of adding water to quicklime, creating calcium hydroxide which is less reactive but still caustic. Buyers must clarify which form they need, as handling requirements, packaging standards, and transport regulations differ significantly between the anhydrous oxide and the hydroxide powder.

How do buyers verify the particle size of Calcium Oxide before shipping?

Buyers request a sieve analysis report that details the percentage of material passing through specific mesh sizes, such as 200 mesh or 325 mesh. This specification ensures the powder has the correct surface area for the intended chemical reaction. Discrepancies between the quoted mesh size and the actual delivered product can lead to inefficient processing or failed quality tests in the buyer's facility.

What lesson does a buyer learn after receiving a bad lot of Calcium Oxide?

A buyer learns that visual inspection of the bag exterior is insufficient because moisture damage can occur internally if the liner is compromised. They also discover that checking the batch date is crucial, as older stock may have absorbed ambient moisture even within sealed bags. This leads to stricter incoming inspection protocols and the use of desiccants or humidity monitors in storage areas.

What field on a listing is most important to negotiate for Calcium Oxide?

The active calcium oxide content percentage is the most critical field to negotiate, as it directly impacts the efficiency and cost of the end use. A lower active content means the buyer is paying for inert impurities like silica or magnesia, which do not contribute to the desired chemical reaction. Buyers should insist on a minimum threshold, typically 90 percent or higher, and define the tolerance limits in the contract.

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Calcium Oxide from China - Chemicals & Allied Products Listings

Browse Calcium Oxide product listings from China on Global Trade Plaza, a B2B marketplace where importers and wholesale buyers connect with sellers, post their buying requirements and trade directly.

Of the 95 Calcium Oxide listings on the platform, 15 were filed from China by 11 separate companies. Each Calcium Oxide row carries its own grade, pack size and order minimum, so the 15 entries are not interchangeable.

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Elite member

Calcium Carbide

Commodity: Calcium carbide Molecular formula:CaC2 Molecule Weight: 64......show more

Origin - Not-available
MOQ - 1000 pieces
Type - Not-available
Payment - Not-available
Price - 700

Lianyungang Huaihua International Trade Co., Ltd.

(5.0)

0 Points
China

Business type -Not-available

Elite member

Calcium Chloride

Commodity: Calcium chloride Molecular formula CaCl2 H.S code 28272000 .....show more

Origin - Not-available
MOQ - 1000 pieces
Type - Not-available
Payment - Not-available
Price - 150

Lianyungang Huaihua International Trade Co., Ltd.

(5.0)

0 Points
China

Business type -Not-available

Pro member

Calcium Propionate

CAS: 4075-81-4 Assay: more than 99% Water content: less than 0.3% Loss.....show more

Origin - Not-available
MOQ - 1000 pieces
Type - Not-available
Payment - Not-available
Price - 000

Huaibei Sanhe Developing Co. Ltd.

(5.0)

0 Points
China

Business type -Not-available

Pro member

Strontium Carbonate

Appearance: White powder Application: Mainly used in magnet material i.....show more

Origin - Not-available
MOQ - 1000 pieces
Type - Not-available
Payment - Not-available
Price - $850/T

Jiangsu Jianhu Pyrotechnics Industry Ltd

(3.5)

0 Points
China

Business type -Not-available

Standard member

Calcium Bromide

Product Description ; Calcium bromide Basic information Product Name: .....show more

Origin - Not-available
MOQ - 1000 pieces
Type - Not-available
Payment - Not-available
Price - N/A

Scale Chemical Corporation

(4.5)

0 Points
China

Business type -Not-available

Standard member

Calcium Chloride

Product Description ; Calcium chloride Basic information Product Name:.....show more

Origin - Not-available
MOQ - 1000 pieces
Type - Not-available
Payment - Not-available
Price - N/A

Scale Chemical Corporation

(4.5)

0 Points
China

Business type -Not-available

Basic member

Calcium Propionate

Calcium propionate is an organic salt that is used as a food additive......show more

Origin - China
MOQ - 1000 pieces
Type - Manufacturer | Trader
Payment - T/T | L/C
Price - $200/MT

Mond Star International Trading Co., Ltd

(3.5)

170 Points
China

Business type -Manufacturer | Trader

Basic member

Calcium Propionate

Product Name: Calcium Propionate Type: Food Additives Origin: China C.....show more

Origin - China
MOQ - 1000 pieces
Type - Distributor
Payment - T/T | L/C | PayPal | Western Union
Price - USD

Aurora Industry Co.,Ltd

(5.0)

250 Points
China

Business type -Distributor

Basic member

Calcium Bones With Chicken For Small Breeds

We specifically made smaller bones for smaller dogs. Enriched with cal.....show more

Origin - Not-available
MOQ - 1000 pieces
Type - Not-available
Payment - Not-available
Price - 0,58

Dog Fest

(3.0)

0 Points
China

Business type -Not-available

Basic member

Calcium Chloride

94% Calcium Chloride PelletCalcium chloride 10043-52-4 74% Calcium Ch.....show more

Origin - China
MOQ - 1000 pieces
Type - Manufacturer | Suppliers
Payment - T/T | D/P
Price - 125

Weifang Banghua Chemical Co., LTD

(3.5)

80 Points
China

Business type -Manufacturer | Suppliers

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Frequently asked questions

What are the current global market trends for Calcium Oxide products?

Global Trade Plaza actively tracks the evolving trends within the Calcium Oxide industry, delivering regular updates on market dynamics, shifts in supply and demand, and emerging opportunities. Stay informed through our Global & AI Chat Support.

What are the specifications and quality standards for the Calcium Oxide products you offer?

Global Trade Plaza ensures that all Calcium Oxide products listed on the Global Trade Plaza B2B Platform adhere to internationally recognized specifications and quality standards. Detailed product specifications and quality certifications are available for each product.

Do you have the capacity to provide large quantities of Calcium Oxide products on a consistent basis?

Global Trade Plaza collaborates with a network of reputable suppliers capable of fulfilling both large and consistent quantities of Calcium Oxide products. Global Trade Plaza B2B Platform facilitates seamless transactions for such requirements.

Can you share information about the origin and source of your Calcium Oxide products?

Transparency is key. Detailed information about the origin and source of each Calcium Oxide product, inclusive of refinery specifics and production locations, is meticulously provided to buyers.

Are you able to offer both spot purchases and long-term supply contracts for Calcium Oxide products?

Indeed, Global Trade Plaza caters to both spot purchases and long-term supply contracts for Calcium Oxide products, addressing the diverse requirements of our valued users.