All raw materials manufactured at Tenghui will receive multiple rounds of inspection prior to shipment. A reliable in-house lab testing system is the backbone of consistent export quality, because it allows us to verify every indicator before material leaves the factory rather than relying only on external reports.

What Our In-House Lab Testing Detects

Equipped with complete testing equipment, our in-house lab detects active ingredients, heavy metals, pesticide residues and microorganisms. By testing identity, potency and purity in the same facility that produces the extract, we keep the quality loop short and reduce the risk of off-specification batches reaching the customer. Chromatographic methods such as HPLC are widely applied for quality control of herbal products.

Adhering to Strict Testing Standards

Adhering to strict testing standards, we ensure all goods comply with the import standards of different countries for hassle-free customs clearance. Each batch is tested against its agreed specification and the results are recorded in a full Certificate of Analysis, giving buyers complete traceability from raw material to finished shipment.

Consistent Quality for Global Markets

Because testing is performed in-house on every batch, customers receive the same standardized quality across orders. This consistency is especially important for brands that formulate the same product for multiple countries, where a small variation in active content can affect compliance and consumer experience. Stable quality also makes it easier for distributors to build a reliable supply program with downstream clients.

Why In-House Testing Matters for Exporters

External laboratories are valuable, but in-house testing keeps quality control on the production timeline. Results come back fast, issues are caught early and adjustments can be made before a batch moves on. For exporters serving several regulated markets, this speed and control reduce the risk of costly rework, rejected shipments and delays that could damage a customer’s own delivery commitments.

Want tested, compliant plant extracts? Hunan Tenghui runs multi-index in-house lab inspection and issues a batch COA with every order.

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