XLSTANDARDS (XiangLong Standards) – the global-facing brand of Changzhou Xianglong Group – is a premier provider of reference materials and standards for biomedical and pharmaceutical industries. With over a decade of dedicated brand operation, we have built a trusted reputation across Asia, North America, Europe, and South America, serving more than 5,000 clients and supporting the successful regulatory approval of over 4,500 drug products.

Our comprehensive portfolio offers more than 60,000 reference substances, including drug standards, impurity reference materials, metabolites, degradation products, and custom-synthesized compounds. We maintain long-term, strategic collaborations with major official pharmacopoeias – including USP, EP, and ChP – positioning XLSTANDARDS among the world’s most recognized names in the field.

Innovation-driven R&D
Led by a postdoctoral synthesis team with extensive overseas expertise, we deliver exceptional custom impurity standard services, ensuring a steady pipeline of novel products and responsive technical support.

Quality-assured manufacturing
Our subsidiary, Longhui Biotechnology, serves as the brand’s production hub, specializing in material production, quality control, and value assignment. Accredited with CNAS (ISO 17025 ) , it guarantees products that are stable, reliable, and fully compliant with international regulatory standards.

Client-centric service
Through Xianglong Pharmaceutical, our experienced professional sales team provides seamless, end-to-end support – from accurate quotations to timely delivery – ensuring a superior customer experience at every stage.

XLSTANDARDS: EXTRA LARGE RELIABILITY.