About Hangzhou Sida Organic Chemical Co., Ltd. - Chemicals & Allied Products Supplier in China

Hangzhou Sida Organic Chemical Co., Ltd. is based in Hangzhou, China and lists five active fine‑chemical products. The catalogue includes 5‑aminotetrazole (HS 2933.99), Neostigmine methylsulfate (HS 2934.99), Pyridostigmine bromide (HS 2933.39), Neostigmine bromide (HS 2923.90) and Methyl 3,5‑diamino‑6‑chloropyrazine‑2‑carboxylate (HS 2933.59). Each entry specifies the chemical name, molecular formula and the HS‑code family that places the items in the “Chemicals & Allied Products” chapter of the customs tariff.

The listed chemicals are heterocyclic organic compounds used primarily in pharmaceutical research, diagnostic reagents and specialty synthesis. All five items fall under the broader HS 29‑section for organic chemicals, indicating that they are subject to standard export documentation for controlled or regulated substances. No additional product attributes such as purity or packaging are provided in the supplier’s data.

Product Range and Specialties of Hangzhou Sida Organic Chemical Co., Ltd.

The product set covers nitrogen‑rich heterocycles and a chlorinated pyrazine ester. In the fine‑chemical market, 5‑aminotetrazole and pyridostigmine bromide are typically supplied at ≥99 % purity with moisture content below 0.5 %, and analytical data are provided by HPLC or NMR. Neostigmine salts (methylsulfate and bromide) are usually marketed as pharmaceutical‑grade reagents, requiring USP or EP‑type specifications. Methyl 3,5‑diamino‑6‑chloropyrazine‑2‑carboxylate is a specialty intermediate often used in agrochemical synthesis, where batch‑to‑batch consistency and impurity profiling are critical. Buyers generally receive these chemicals in sealed IBC drums or 25 kg polyethylene bags, with a Certificate of Analysis attached.

Trade and Export Information - Hangzhou Sida Organic Chemical Co., Ltd.

China is a major exporter of fine chemicals, and products classified under HS 2933, 2934 and 2923 are commonly shipped to North America, the European Union and Southeast Asian research markets. Importers usually request REACH registration evidence for EU customs and FDA‑compliant documentation for US pharmaceutical use. Standard export paperwork includes a commercial invoice, packing list, Material Safety Data Sheet (MSDS) and, where applicable, a Controlled Goods Declaration. Freight is typically arranged on a 20‑ft container basis, with the chemicals packed in IBC drums or bulk bags that meet UN 3373 “dangerous goods” handling if any hazardous classification applies.

Sourcing from Hangzhou Sida Organic Chemical Co., Ltd. - Buyer Guidance

When sourcing from Hangzhou Sida, buyers should ask for a recent Certificate of Analysis that details assay, impurity limits and moisture content for each batch. Request the MSDS, REACH registration number (for EU shipments) and any GMP or ISO‑9001 audit reports that the supplier can provide, even though the supplier does not list these certifications in its public data. Verify the packaging material (e.g., HDPE drum with inner liner) and confirm that the shipment will be sealed and labeled according to UN 3373 if the chemical is classified as hazardous. Typical minimum order quantities for fine‑chemical intermediates range from 1 kg to 5 kg, with lead times of 4‑6 weeks after receipt of a purchase order and required pre‑shipment testing.

What HS codes apply to the chemicals listed by Hangzhou Sida?

The catalogue assigns HS 2933.99 to 5‑aminotetrazole, HS 2934.99 to Neostigmine methylsulfate, HS 2933.39 to Pyridostigmine bromide, HS 2923.90 to Neostigmine bromide and HS 2933.59 to Methyl 3,5‑diamino‑6‑chloropyrazine‑2‑carboxylate.

Which documents should a buyer request before placing an order?

Buyers should request a Certificate of Analysis, the Material Safety Data Sheet, REACH registration evidence (for EU imports) and any available GMP or ISO‑9001 audit reports.

What typical purity levels are expected for these fine chemicals?

In the specialty chemicals market, assay values of 98‑99 % or higher are standard, with moisture not exceeding 0.5 % and impurity limits defined by USP/EP specifications for pharmaceutical‑grade reagents.

How are the chemicals usually packaged for export?

Exports from China are commonly packed in 25 kg polyethylene bulk bags or 200‑L IBC drums, both sealed with tamper‑evident closures and labeled according to UN 3373 when hazardous.

What are the usual shipping terms and container sizes?

Suppliers often ship on a CIF or FOB basis using 20‑ft containers; a full 20‑ft container can hold roughly 8‑10 tons of bulk fine chemicals depending on packaging density.

What lead time and minimum order quantity should a buyer expect?

Typical lead times are 4‑6 weeks after order confirmation, and minimum order quantities range from 1 kg to 5 kg per SKU, depending on the specific compound.

Which markets commonly import these types of heterocyclic compounds?

North American pharmaceutical manufacturers, European research laboratories and Southeast Asian agro‑chemical producers are the primary importers of nitrogen‑rich heterocycles and related intermediates.

Are there any special regulatory requirements for Neostigmine salts?

Neostigmine salts are classified as pharmaceutical intermediates, so buyers should verify compliance with USP/NF or EP monographs and ensure that REACH and FDA registration documentation are in place for the intended end use.