XL Standards is belonged to Changzhou Xianglong Group for overseas market. Changzhou Xianglong Group is a group company specializing in the research and development, production, quality control, and sales of standard substances/standards in the field of life and health sciences. After more than ten years of brand operation, we have served over 5000 customers in markets such as Asia, North America, Europe, and South America, and assisted in the successful approval of over 4500 types of drugs. This brand provides over 60000 standard substances to global customers and has established long-term stable partnerships with official pharmacopoeias such as the United States Pharmacopeia, European Pharmacopoeia, and Chinese Pharmacopoeia, becoming one of the most well-known standard substance brands in the world. Its products include drug standards, impurity reference standards, metabolites, degradation products, and customized synthetic standard products.

Xianglong Group has introduced a synthetic team led by postdoctoral researchers with overseas experience, possessing exceptional capabilities in customizing impurity standards. This team provides brands with a continuous stream of innovative products and technical support.

Longhui Biotechnology, a subsidiary of the group and the production entity of the brand, specializes in the production, quality control, and assignment of standard materials. In 2023, it obtained CNAS(ISO 17025) laboratory accreditation, ensuring the provision of high-quality, stable, reliable, and regulatory-compliant products to customers.

Xianglong Pharmaceutical, a subsidiary of the group, has established a seasoned and professional sales service team for the brand. This team is capable of delivering high-quality, end-to-end services—from product quotations to delivery—ensuring an exceptional service experience for clients.