About Haohua Northchem Co., Ltd. - Chemicals & Allied Products Supplier in China

China‑based Haohua Northchem Co., Ltd. lists six distinct chemical products in its online catalogue. The list includes High Purity Barium Carbonate (HS 2836.60), High Purity Strontium Carbonate (HS 2836.92), standard Barium Carbonate (HS 2836.99), standard Strontium Carbonate (HS 2836.92), Precipitated Barium Sulphate (HS 2833.27) and Technical‑grade Sodium Sulfide (HS 2830.10). Each entry specifies the chemical formula - BaCO3, SrCO3, BaSO4 or Na2S - and the associated HS‑code family used for customs classification.

The catalogue separates “high purity” grades from standard grades, indicating that purity levels, particle size distribution and impurity limits differ between the two. High Purity Barium and Strontium Carbonates are typically marketed for electronic ceramics and optical glass, while the standard grades serve bulk applications such as pigments, fillers and flame‑retardant formulations. The Barium Sulphate entry notes a precipitated grade, a form commonly required for high‑whiteness pigments. Sodium Sulfide is listed as a technical grade, suitable for pulp‑and‑paper processing and certain metal‑treating operations.

Product Range and Specialties of Haohua Northchem Co., Ltd.

The six products cover two carbonate families (barium and strontium) and two auxiliary chemicals (barium sulphate and sodium sulfide). In the global market, high‑purity barium carbonate is usually supplied at 99.9 % purity with particle sizes ranging from 1 to 10 µm, while standard grades may be 97 % - 98 % purity with broader size distributions. Strontium carbonate follows similar specifications, with high‑purity grades meeting ≤0.02 % heavy‑metal limits. Precipitated barium sulphate is generally required to meet a whiteness index above 95 % and a median particle size (d50) of 0.5 - 5 µm. Technical‑grade sodium sulfide is often delivered at 85 % - 90 % purity, with moisture content below 5 % and a typical bulk density of 1.5 t/m³. Buyers usually request certificates of analysis (CoA), material safety data sheets (MSDS) and, for high‑purity grades, trace‑metal assay results.

Trade and Export Information - Haohua Northchem Co., Ltd.

Exporters of carbonate chemicals from China frequently ship to Southeast Asia, the European Union and North America, where the ceramics, glass‑fiber and specialty‑pigment industries dominate demand. The HS‑code 2836 series (carbonates) is subject to standard customs duties and may require an import permit in the EU under REACH regulations. Barium sulphate (HS 2833.27) often appears in pigment‑grade shipments and is inspected for particle‑size compliance under the EU’s Classification, Labelling and Packaging (CLP) rules. Sodium sulfide (HS 2830.10) is classified as a hazardous chemical in many jurisdictions, so buyers typically request a full safety data package and may need to arrange for a bonded warehouse or special handling. Chinese exporters normally use 20‑foot or 40‑foot containers with inner drums (55 gal) or bulk bags (25 kg) for solid chemicals, and they follow Incoterms such as FOB Shanghai or CIF Hong Kong. Common buyer‑required certifications include ISO 9001 quality management, REACH registration and, where applicable, RoHS compliance.

Sourcing from Haohua Northchem Co., Ltd. - Buyer Guidance

When sourcing from Haohua Northchem, request a recent CoA that specifies purity, moisture, particle‑size distribution and heavy‑metal limits for each carbonate grade. For the precipitated barium sulphate, ask for a whiteness index measurement and a particle‑size analysis (e.g., laser diffraction). Sodium sulfide shipments should be accompanied by an MSDS, a hazard classification report and evidence of compliance with local toxic‑substance regulations. Verify that the supplier can provide REACH registration numbers for the listed chemicals; absence of such documentation may delay customs clearance. Typical minimum order quantities in the industry range from 5 metric tons for bulk carbonate grades to 1 metric ton for high‑purity variants, with lead times of 30‑45 days after order confirmation.

What purity levels are available for the barium and strontium carbonates?

High Purity grades are generally ≥99.9 % pure, while the standard grades listed under HS 2836.99 and HS 2836.92 are typically 97 % - 98 % pure.

Which certifications should I request before purchasing?

Ask for a current Certificate of Analysis, an MSDS, and proof of REACH registration. ISO 9001 certification is common among Chinese chemical exporters and can be requested as well.

What packaging formats are used for these chemicals?

Bulk shipments are usually packed in 20 ft or 40 ft containers with inner 55 gal steel drums or 25 kg bulk bags, sealed to prevent moisture ingress.

What are the typical minimum order quantities?

Industry practice sets MOQ at about 5 metric tons for standard carbonate grades and 1 metric ton for high‑purity variants; barium sulphate and sodium sulfide follow similar thresholds.

How long does production and delivery take?

Lead times are generally 30‑45 days from order confirmation, depending on product grade and required testing.

Are there any special handling requirements for sodium sulfide?

Yes, sodium sulfide is classified as hazardous; it must be shipped in sealed, moisture‑proof containers and accompanied by a full safety data sheet and any local hazardous‑material permits.