About Weifang Longstar Chemical Inc. - Industrial Chemicals Supplier in China

Weifang Longstar Chemical Inc. is based in China and currently lists 14 active products. The catalogue covers industrial chemicals such as sodium gluconate tech grade (HS 2918.16, D‑Gluconic acid sodium salt), succinic acid amber acid (HS 2917.12, C4H6O4), magnesium sulfate heptahydrate (HS 2833.21, MgSO4·7H2O), isopropyl alcohol 99.9 %, gluconic acid 50 % solution (HS 2918.16), sodium nitrite 98 % (HS 2834.10), sodium nitrate 99.3 % min, modified starch variants, a sulphonated tannin (HS 3201.90), and a sulphonated asphalt product. The listed items span both organic and inorganic chemical HS chapters, with multiple entries sharing the 2918.16 code for gluconate‑based products.

The product set is organized under the broader categories of Industrial Chemicals, Medical Face Masks, Sodium Nitrite, Starch, and Industrial Alcohol as indicated in the supplier profile. While the supplier also mentions medical face masks and industrial alcohol, the detailed catalogue focuses on chemical substances, each identified by a specific HS code and chemical formula where provided.

Product Range and Specialties of Weifang Longstar Chemical Inc.

The catalogue includes sodium gluconate tech grade, typically supplied with a purity of 99.5 % - 99.9 % and used as a chelating agent in detergents, concrete admixtures, and water treatment. Succinic acid, often marketed at ≥99 % purity, serves as a building block for biodegradable polymers and plasticisers. Magnesium sulfate heptahydrate is commonly offered at 98 % - 99 % purity and is a standard component in fertilizer blends and industrial cooling systems.

Isopropyl alcohol listed at 99.9 % purity meets the USP‑grade specifications for electronic cleaning and pharmaceutical applications. Sodium nitrite products at 98 % - 98.5 % purity are typical for use as corrosion inhibitors and food preservatives, while sodium nitrate at 99.3 % purity is a conventional fertilizer nitrogen source. Modified starch products, described as high‑temperature high‑pressure (HTHP) starch, are usually supplied with a moisture content below 12 % and a gelatinisation temperature above 80 °C for food and pharmaceutical uses. The sulphonated tannin, classified under HS 3201.90, is a lignin‑based adhesive additive, and sulphonated asphalt is employed in road‑construction binders.

Trade and Export Information - Weifang Longstar Chemical Inc.

China is a leading exporter of both organic and inorganic industrial chemicals, with the HS 28 and 29 chapters accounting for a substantial share of global trade flows. Buyers in Southeast Asia, the European Union, and North America regularly import chemicals such as sodium gluconate, succinic acid, and magnesium sulfate from Chinese manufacturers, often requiring compliance with REACH, ISO 9001 quality systems, and provision of a Certificate of Analysis (COA) for each shipment.

Typical export packaging includes 25 kg drums for bulk liquids, 500 kg totes for powdered chemicals, and 20‑ft or 40‑ft containers for larger orders. Common Incoterms are FOB Shanghai or CIF destination port, with customs documentation covering the HS codes 2918, 2917, 2833, 2834, and 3201. Importers of sodium nitrite and sodium nitrate frequently need additional safety data sheets and, where applicable, permits for nitrate‑containing substances.

Sourcing from Weifang Longstar Chemical Inc. - Buyer Guidance

When sourcing from Weifang Longstar Chemical Inc., buyers should request the latest COA, MSDS, and, for nitrate‑based products, any required import permits or compliance certificates. Verifying the HS code on the commercial invoice against the product description helps ensure correct tariff treatment and avoids customs delays.

Samples of the liquid chemicals (e.g., isopropyl alcohol, gluconic acid solution) are generally supplied in 100 ml vials, while solid products such as succinic acid can be provided in 500 g sachets for laboratory testing. Typical minimum order quantities start at 1 tonne for bulk chemicals, with lead times ranging from four to six weeks after order confirmation, subject to production scheduling and export clearance.

What HS codes are associated with the chemicals listed by Weifang Longstar Chemical Inc.?

The catalogue uses HS 2918.16 for sodium gluconate and gluconic acid solutions, HS 2917.12 for succinic acid, HS 2833.21 for magnesium sulfate heptahydrate, HS 2834.10 for sodium nitrite, and HS 3201.90 for the sulphonated tannin. Products without a listed code fall under the broader HS 28 or 29 chapters for inorganic and organic chemicals.

What purity levels are typical for the sodium gluconate and sodium nitrite products?

Sodium gluconate tech grade is generally supplied at 99.5 % - 99.9 % purity, while sodium nitrite is offered at 98 % - 98.5 % purity. Buyers should confirm the exact purity on the Certificate of Analysis for each batch.

Which certifications should a buyer request for these chemical products?

Buyers commonly request ISO 9001 quality‑management certification, REACH compliance documentation for the EU market, and a full Material Safety Data Sheet. For food‑grade applications, a GMP or USP certification may also be required.

What packaging formats are used for the bulk chemicals?

Liquid chemicals such as isopropyl alcohol and gluconic acid solutions are typically packed in 25 kg steel drums or 200 L polyethylene containers. Solid powders like succinic acid and magnesium sulfate are usually shipped in 25 kg paper bags or 500 kg bulk bags.

What are the usual incoterms for shipments from this supplier?

Export transactions from China commonly use FOB Shanghai or CIF destination port, depending on the buyer’s preference. The chosen incoterm determines whether freight and insurance costs are included in the seller’s price.

How long does it take to receive a sample from Weifang Longstar Chemical Inc.?

Sample preparation and dispatch generally require 3 - 5 business days, after which standard air freight delivers the sample within 7 - 10 days to most international destinations.

Are there any specific regulatory restrictions for importing sodium nitrate or sodium nitrite?

Both sodium nitrate and sodium nitrite are classified as nitrate salts and may be subject to import permits, especially for agricultural or food‑preservative uses. Importers should verify national regulations and provide the necessary safety data sheets and certification of analysis.