Weifang Longstar Chemical Inc.

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.

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.