Name: Calcium carbide
Chemical Formula: CaC2
CAS Number: 75-20-7
UN Number: 1402
Class Grade: 4.3
HS Code: 2849100000
In the global polyvinyl chloride (PVC) manufacturing industry, the choice of raw materials directly dictates the efficiency of the production line and the quality of the final polymer. As a premier, direct-manufacturing factory specializing in industrial chemical supplies, we understand the rigorous demands of large-scale PVC synthesis. Among various specifications, Calcium Carbide 25-50mm stands out as the optimal particle size for optimizing the acetylene generation phase, which is the foundational step in the calcium carbide method for making PVC.

The core of PVC production relies on the steady and controlled hydrolysis of calcium carbide (CaC2) to generate acetylene gas (C2H2). The 25-50mm sizing provides a perfect balance in the reaction kinetics:
Controlled Gas Evolution: Unlike smaller fractions or powder that cause violent, unpredictable gas surges and dangerous pressure spikes, the 25-50mm range ensures a smooth, continuous, and stable release of acetylene.
High Reaction Efficiency: This specific granularity prevents the core "shielding" effect often seen in oversized lumps (above 80mm), where the outer layer reacts but the inner core remains unhydrolyzed. This guarantees maximum yield per ton and minimal raw material waste.
Equipment Longevity: The uniform 25-50mm size flows smoothly through modern dry or wet-type acetylene generators, preventing mechanical blockages and significantly reducing maintenance downtime for PVC plants.

As an industry-leading factory with over 15 years of B2B export expertise, we do not just sell chemical products.
High Purity & Strict Quality Control: Our calcium carbide boasts an exceptionally high gas yield, ensuring minimal impurities (such as phosphine and hydrogen sulfide). This clean acetylene generation directly translates into higher conversion rates during the vinyl chloride monomer (VCM) synthesis stage.
Rapid Global Dispatch: Leveraging our dedicated hazardous goods storage facilities across major transit hubs, we guarantee ultra-fast shipping and seamless logistics to keep your PVC production lines running uninterrupted.
Tailored Customization: From customized particle size distributions to specialized double-layer steel drum packaging sealed under nitrogen, we accommodate your precise technical and regional compliance requirements.

By choosing our top-tier Calcium Carbide 25-50mm, you invest in processing safety, reduced operational costs, and superior PVC product output. Contact our commercial team today to secure premium material yields and accelerate your manufacturing growth.