Import Undensified Microsilica (Silica Fume) — Buy in wholesale FOB from Supplier in China
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Undensified Microsilica (Silica Fume)
Undensified Microsilica, also known as Silica Fume, is supplied by Xiamen All Carbon Corporation in light gray powder form. The material contains silicon dioxide between 85 % and 98 % by weight, as stated in the supplier’s data. Its bulk density ranges from 300 kg/m3 to 400 kg/m3, giving it a very low mass per unit volume. The product is offered in the standard grades 85U, 92U, 94U, 96U and 98U.
In the concrete industry this silica fume is valued for its pozzolanic activity, which improves strength and durability of high‑performance mixes. Typical particle size for undensified microsilica lies between 0.1 µm and 0.2 µm, providing a high specific surface area that is usually 20 m2/g to 30 m2/g. The low bulk density enables easy incorporation into refractory formulations and advanced ceramic bodies. These typical characteristics match the specifications used by most manufacturers in Europe and North America.
Buyers such as ready‑mix concrete producers, refractory brick makers and ceramic manufacturers commonly source this product in bulk bags of one tonne. The listing does not disclose minimum order quantity, lead time or price, so interested importers should request a formal quotation from the supplier. When negotiating, confirm the preferred Incoterm, payment schedule and any required export documentation.
| Material | Silica Fume (Undensified) |
| SiO2 Content | 85-98 % |
| Bulk Density | 300-400 kg/m3 |
| Color | Light gray |
| Grade Classification | 85U, 92U, 94U, 96U, 98U |
| Particle Size | typical 0.1-0.2 µm |
| Specific Surface Area | typical 20-30 m2/g |
| Typical Packaging | bulk bag 1 tonne |
| Typical Moisture Content | typical <1 % |
| Typical Storage Condition | dry, temperature below 30 °C |
Xiamen All Carbon Corporation is based at No.99 Lujiang Rd, Xiamen, Fujian Province, China, postal code 361001. The company holds a harbor‑tier verification on the marketplace, indicating that its business registration has been cross‑checked. Its listed response rate is currently 0 %, and average response time is recorded as zero hours, meaning the supplier has not replied to recent enquiries. The address and tier are the only verifiable details supplied.
The firm produces undensified microsilica as a by‑product of its ferrosilicon and silicon metal operations, collecting the material directly from the furnace off‑gas streams. An automatic and integrated production line is claimed to deliver consistent SiO2 content and bulk density across batches. No additional certifications, capacity figures or client references are provided in the listing. Prospective buyers should therefore request recent test reports to confirm product quality.
Undensified Microsilica, also known as Silica Fume, is a high-purity by-product of ferrosilicon and silicon metal production with SiO2 content ranging from 85% to 98%. Its characteristic low bulk density of 300-400 kg/m3 makes it ideal for refractory applications, high-performance concrete, and advanced ceramics. This product is widely traded internationally for industrial use, with major supply origins in China, Norway, and the USA.
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Sourcing Undensified Microsilica (Silica Fume) from Xiamen All Carbon Corporation - China Import Guide
Before placing an order, verify the SiO2 content and bulk density against the supplier’s certificate of analysis, and confirm the exact grade code (85U‑98U) you require. Request a recent test report that includes particle size distribution and specific surface area, as these parameters directly affect performance in concrete and refractory applications. Checking the harbour‑tier verification and the supplier’s address helps ensure the business is legitimate and traceable.
Logistics for this product are usually arranged on an FOB basis from Xiamen port, but the buyer should confirm the Incoterm that best fits the supply chain. Typical lead times are not disclosed, so ask the supplier for an estimated dispatch schedule and any shipping constraints related to bulk bag handling. Payment terms such as T/T in advance or LC at sight should be negotiated in line with the buyer’s risk tolerance and the supplier’s standard practice.
Quality assurance should include a third‑party inspection of a pre‑shipment sample, focusing on moisture content, particle size and bulk density. Request an independent laboratory report that follows ASTM C1240 or EN 13263 standards, depending on the target market. Ensure that the supplier can provide a full material safety data sheet and any applicable export certificates to smooth customs clearance.
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30 suppliersBuy Undensified Microsilica ( in Bulk — Verified Supplier in China
When sourcing Undensified Microsilica (Silica Fume) for your business, securing the right balance of quality and cost is essential. Xiamen All Carbon Corporation, a verified supplier based in China, offers this product with key specifications including Undensified Powder, Amorphous Silica, 85% - 98% (grade-dependent), and 0.1 - 0.5 micrometers (typical). By purchasing directly from the manufacturer or authorized exporter, buyers can negotiate favorable FOB prices starting at $11/Bags and manage bulk orders with a minimum order quantity (MOQ) of 1 Bags. This product is actively traded under HS Code 2505.90, making it a staple in the Silica Sand sector with strong demand from importing countries worldwide.
Undensified Microsilica ( Specifications, Trade Terms & Pricing
Importing Undensified Microsilica ( requires careful attention to shipping logistics, customs compliance, and secure payment terms. Xiamen All Carbon Corporation offers flexible shipping options such as Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. To ensure a smooth transaction, buyers should verify import duties for HS Code 2505.90 in their destination country. Common payment methods for international B2B transactions include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P). All transactions and RFQs are facilitated through EximNext, a leading import export marketplace designed to make cross-border trade secure and efficient.
About Xiamen All Carbon Corporation — Supplier in China
Finding trustworthy partners is the foundation of successful importing. The supplier of this Undensified Microsilica ( has been verified on our platform. Whether you are a distributor, wholesaler, or procurement manager, you can request a free quotation, ask for product samples, and finalize your bulk purchase with confidence. EximNext hosts thousands of verified manufacturers and exporters across 200+ countries. Explore similar products in the Silica Sand category and connect with top-tier exporters on our comprehensive online B2B marketplace. Start your sourcing journey today.
Import Undensified Microsilica ( — Shipping, Logistics & Customs
Importing Undensified Microsilica ( requires careful attention to shipping logistics, customs compliance, and secure payment terms. Common shipping options include Full Container Load (FCL) or Less than Container Load (LCL) via sea freight. Buyers should verify import duties for HS Code 2505.90 in their destination country. Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), and Documents against Payment (D/P).
Frequently Asked Questions About Undensified Microsilica (
What is the wholesale price of Undensified Microsilica (Silica Fume)?
The current listed wholesale price for Undensified Microsilica (Silica Fume) from Xiamen All Carbon Corporation is $11/Bags on FOB terms from China. Prices may vary depending on order volume, packaging, and destination. For the most accurate bulk quote, send a direct RFQ to Xiamen All Carbon Corporation through EximNext.
What is the Minimum Order Quantity (MOQ) for Undensified Microsilica (?
The supplier, Xiamen All Carbon Corporation, has set a Minimum Order Quantity (MOQ) of 1 Bags for Undensified Microsilica (. For sample requests or smaller trial orders, contact the supplier directly through our platform's inquiry system.
What is the HS Code for Undensified Microsilica (Silica Fume)?
For international shipping and customs clearance, Undensified Microsilica (Silica Fume) is classified under HS Code 2505.90. Buyers should verify their local customs regulations to determine applicable import duties and taxes for this classification.
How can I import Undensified Microsilica ( from China?
To import Undensified Microsilica ( from China, negotiate shipping terms (FOB, CIF, or EXW) directly with Xiamen All Carbon Corporation. Ensure you have the necessary import licenses for Silica Sand products in your destination country.
Is Xiamen All Carbon Corporation a verified supplier?
Yes, Xiamen All Carbon Corporation is a verified supplier on EximNext. You can view their complete company profile, business registration details, certifications, and export history before placing a bulk order.
What are the key specifications of Undensified Microsilica (Silica Fume)?
The key specifications for Undensified Microsilica (Silica Fume) supplied by Xiamen All Carbon Corporation include Undensified Powder, Amorphous Silica, 85% - 98% (grade-dependent), and 0.1 - 0.5 micrometers (typical). For a complete technical data sheet or Certificate of Analysis (COA), send an inquiry directly to the supplier through EximNext.
What packaging options are available for bulk orders of Undensified Microsilica (?
Xiamen All Carbon Corporation offers Undensified Microsilica ( with standard export packaging. Custom packaging, private labeling, and OEM/ODM options may also be available for large wholesale orders.
Which countries import Undensified Microsilica ( the most?
Undensified Microsilica ( is actively imported by buyers worldwide. Request a destination-specific CIF or CFR quote from Xiamen All Carbon Corporation through our platform.
What certifications does this Undensified Microsilica ( supplier hold?
Xiamen All Carbon Corporation maintains international quality certifications. These ensure that the Undensified Microsilica ( meets international quality, safety, and regulatory standards required for cross-border trade.
How do I place a bulk order for Undensified Microsilica (Silica Fume) on EximNext?
Click "Request Quotation" on this product page, specify your required quantity, preferred shipping terms, and destination country. Xiamen All Carbon Corporation will respond with a detailed wholesale quote including FOB pricing, lead time, and payment options.
What payment methods are accepted?
Common payment methods include Letter of Credit (L/C), Telegraphic Transfer (T/T), Documents against Payment (D/P), and Escrow services. Confirm accepted terms directly with Xiamen All Carbon Corporation.
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