Calcium Carbide N2 – Precision-Grade 4-7mm for Industrial Excellence
When you search for calcium carbide N2, you are looking for a product that delivers consistency, performance, and value. We are a Chinese manufacturer with an annual production capacity of 70,000 metric tons, and we specialize in producing high-quality calcium carbide N2 in the 4-7mm size range. This medium-fine grade is engineered for applications where controlled reaction rates, efficient gas generation, and superior metallurgical performance are essential.

Why 4-7mm Calcium Carbide N2?
The 4-7mm grade occupies a sweet spot in the calcium carbide size spectrum – fine enough for rapid, complete reactions, yet coarse enough to minimize dust generation and handling losses. Here is where calcium carbide N2 in 4-7mm truly excels:
1. Steel Industry Desulfurization and Deoxidation – This is one of the most critical applications for 4-7mm calcium carbide. With its powerful desulfurizing and deoxidizing properties, it efficiently removes sulfur from ductile iron and steel during the casting process. Calcium carbide has the highest affinity to oxygen and sulfur, achieving fast and efficient deoxidation as well as desulfurization. The 4-7mm particle size ensures uniform distribution and rapid reaction in ladle treatment facilities, making it the preferred desulphurising agent for ductile iron production.

2. Acetylene Gas Generation – When calcium carbide N2 in 4-7mm reacts with water, it generates acetylene gas with a guaranteed yield of 260–280 L/kg. This acetylene fuels oxy-fuel welding and cutting torches in metal fabrication shops, shipyards, and construction sites worldwide. The 4-7mm size provides a controlled, steady reaction rate – ideal for both portable generators and industrial acetylene plants.
3. PVC and Chemical Synthesis – Acetylene derived from our calcium carbide N2 is a critical raw material for producing polyvinyl chloride (PVC), synthetic rubber, acetone, and other organic compounds. The 4-7mm grade ensures complete reaction in chemical processes, reducing waste and improving yield.
4. Fruit Ripening Catalyst – In agricultural regions across Africa, South America, and Southeast Asia, calcium carbide N2 is widely used as a ripening agent for bananas, mangoes, and other fruits. The 4-7mm granules release acetylene gas evenly when exposed to moisture, providing consistent ripening results.
5. Calcium Cyanamide Production – When combined with nitrogen at high temperatures, calcium carbide produces calcium cyanamide, a valuable nitrogen fertilizer.

Complete Size Range – One Supplier, All Your Needs
While 4-7mm is our featured calcium carbide N2 grade, we produce calcium carbide in every standard size to serve diverse applications:
Whatever your application demands, we have the right size – and the right calcium carbide N2 quality to match.

Packaging That Protects Your Investment
Calcium carbide is moisture-sensitive, and our packaging reflects that reality. We offer both 50kg and 100kg new steel drums, each nitrogen-purged and hermetically sealed to prevent moisture ingress. A standard 20-foot container holds:
All drums comply with UN 1402 regulations for Class 4.3 dangerous goods (Dangerous when wet). We use heavy-gauge steel with airtight seals, and each drum is clearly labeled with product specifications, batch numbers, and handling instructions.

Customization – Your Brand, Your Way
We understand that every customer has unique needs. That is why we offer comprehensive customization services for all calcium carbide N2 orders:
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Custom drum colors – choose from gray, black, green, yellow, blue, or any RAL shade to match your branding
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Custom shipping marks – we print your logo, product details, batch numbers, and handling instructions directly on each drum
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Mixed sizes – we can pack different particle sizes in separate drums within the same container
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Palletized loading – available upon request for easier handling
All customizations come at no extra charge for standard markings – keeping your calcium carbide N2 cost competitive and transparent.

Serving the World – Africa, South America, Middle East, and Southeast Asia
Our calcium carbide N2 reaches customers across four continents. In Africa, we are a trusted supplier to Togo, where the calcium carbide market is projected to expand at a high growth rate of 10.57% by 2027, as well as Nigeria, Côte d'Ivoire, Ghana, South Africa, Ethiopia, and Algeria. In fact, Togo's calcium carbide import market showed a notable growth spike of 7.14% from 2023 to 2024, with China being the top exporter.
In South America, we serve Colombia, where the calcium carbide market is projected to witness steady growth with rates reaching up to 4.03% by 2026, driven by increasing demand from steel production and chemical manufacturing. We also supply Peru, Ecuador, Chile, Brazil, and Argentina.
In the Middle East, our customers in Turkey, Iran, and the GCC countries value our consistent quality and competitive pricing. Across Southeast Asia, we supply Vietnam (which imported over 3,696 metric tons of calcium carbide from China), Indonesia, Thailand, Malaysia, and the Philippines.
We export to Europe, North America, and Australia as well. Wherever you are, we deliver.
Certificates You Can Rely On
Every shipment of calcium carbide N2 comes with full documentation to give you complete peace of mind:
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Gas yield certificate – guaranteed ≥260–280 L/kg acetylene
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ISO 9001:2015 quality management certification
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SGS inspection reports – available per batch upon request
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UN 1402 dangerous goods certification (Class 4.3)
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Material Safety Data Sheet (MSDS) – available in multiple languages
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Third-party testing – we can arrange additional analyses for phosphorus, sulfur, and nitrogen content
We maintain batch traceability for five years, giving you complete confidence in every order.

Fast Dispatch from Our Mega Warehouse
We don't just produce – we stock. Our large warehouse maintains substantial inventory of all grades, including 4-7mm calcium carbide N2 in both 50kg and 100kg drums. This means we can ship most orders within 7 working days – sometimes faster for urgent requests. Quick delivery means less downtime for your production line and lower inventory carrying costs for you.
Why Our Calcium Carbide N2 Stands Out
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Direct manufacturer – no middlemen, factory-direct pricing
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70,000-ton annual capacity – reliable supply for spot orders and long-term contracts
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Full size range – all grades from 1-4mm to 80-120mm in stock
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Flexible packaging – 50kg and 100kg drums, custom colors and markings
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Global shipping – we handle all export documentation and customs clearance
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Certified quality – ISO, SGS, UN-compliant with full traceability
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Responsive service – quotes within 24 hours, samples available upon request
Request Your Calcium Carbide N2 Quote Today
Whether you need 4-7mm calcium carbide N2 for steel desulfurization, acetylene generation, or any other application – or a mixed-size container for diverse needs – we are ready to deliver. Tell us your required particle size, preferred drum weight, drum color, and marking details. We will prepare a competitive quotation and shipping schedule within 24 hours.