Diphenhydramine hydrochloride price manufacturers

As a pharmaceutical active ingredient (API), Diphenhydramine Hydrochloride must comply with international pharmacopoeia standards such as USP (United States Pharmacopeia), BP (British Pharmacopeia), or EP (European Pharmacopoeia). Buyers should prioritize suppliers holding GMP (Good Manufacturing Practice) certification and a CEP (Certificate of Suitability) or DMF (Drug Master File) number to ensure the product is suitable for pharmaceutical formulation and regulatory submission.

Buyers must scrutinize the COA for Assay purity (typically 98.0% - 102.0%), Melting point (167°C to 172°C), and Loss on drying (≤0.5%). It is crucial to check for Related Substances/Impurities levels and Residual Solvents to ensure they fall within ICH (International Council for Harmonisation) guidelines. For specific formulations, the particle size distribution may also be a key requirement.

Diphenhydramine Hydrochloride is primarily used as a first-generation antihistamine for treating allergies, motion sickness, and as a sedative. In a B2B context, it is sourced for the production of tablets, capsules, syrups, and topical creams. The material must exhibit high solubility in water and excellent chemical stability under standard storage conditions to ensure the shelf-life of the final medicinal product.

To optimize costs, buyers should evaluate the Total Cost of Ownership (TCO), including the cost of regulatory documentation (e.g., providing a Tech Pack) and third-party lab testing. Sourcing from large-scale manufacturers on Made-in-China.com often allows for tiered pricing, where orders exceeding 500kg - 1,000kg can reduce the unit price by 15-25% compared to pilot-scale quantities.

The main risk involves Customs seizure or rejection due to lack of proper medical import licenses. Buyers must ensure the supplier provides a Material Safety Data Sheet (MSDS) and that the product is correctly classified under the HS Code (typically 2922.19). Ensure the supplier is registered with the destination country's health authority (e.g., FDA in the US or EMA in Europe) if the product is intended for human consumption.

Use Secured Payment terms or Letters of Credit (L/C) for large volumes to mitigate financial risk. Before full payment, it is highly recommended to hire a third-party inspection agency (like SGS or Intertek) to perform pre-shipment sampling and testing to verify that the batch matches the provided COA.

Diphenhydramine Hydrochloride is generally classified as a non-hazardous chemical for transport, but it must be packed in fiber drums with double PE inner bags to prevent moisture absorption. Ensure the labels include Batch Numbers, Manufacture/Expiry Dates, and Storage Conditions (Store in a cool, dry place) to comply with international maritime and air freight regulations.

Focus on long-term supply stability rather than just the lowest price. Inquire about the supplier's environmental compliance status (Blue Sky initiatives), as sudden factory shutdowns for environmental audits can disrupt supply chains. Requesting a working sample (10-50g) for internal lab validation before committing to a bulk purchase is a standard and necessary negotiation step.