CAS DATA

CAS REGISTRY is the standard source relied upon by scientists, manufacturers, regulators, and data scientists worldwide for accurate and complete information on chemical substances and sequences. Containing chemical names, structures, CAS Registry Numbers^®, properties, and a myriad of other data for more than 279 million registered substances, CAS REGISTRY is the hub of the CAS Content Collection.

The CAS reference collection aggregates and connects scientific knowledge from thousands of journals and other sources published globally in more than 50 languages dating back to the early 1800s.

CAS patent data covers key invention details from applications published by 109 global patent authorities. This scientist-curated resource makes complex aspects of patent documents including chemical substances, sequences, Markush structures, assignees, and classification codes searchable and accessible.

The CAS reaction collection is the most trusted source for detailed and dependable synthetic organic reaction data. Defined substance roles, reaction conditions, yields, and catalysts for more than 150 million single- and multi-step reactions provide insight that empowers efficient synthesis planning and scale up.

CAS Commercial Sources connects researchers with chemical suppliers by providing an aggregated source of current global chemical catalog data including quantities, prices, and supplier contact information to simplify chemical sourcing and expedite research.

A unique collection of detailed information on formulations sourced from journals, patents, and product inserts, CAS Formulations provides the critical information researchers, formulators, and IP professionals need to get safe and effective products to market faster.