CAS Number
Notice
ALL ARTICLES AND PRODUCT INFORMATION PROVIDED ON THIS WEBSITE ARE FOR INFORMATIONAL AND EDUCATIONAL PURPOSES ONLY. The products offered on this website are furnished for in-vitro studies only. In-vitro studies (Latin: in glass) are performed outside of the body. These products are not medicines or drugs and have not been approved by the FDA to prevent, treat or cure any medical condition, ailment or disease. Bodily introduction of any kind into humans or animals is strictly forbidden by law.
What is a CAS Number?
A CAS (Chemical Abstracts Service) Registry Number is a unique numerical identifier assigned to every chemical substance described in the open scientific literature. Administered by the American Chemical Society's Chemical Abstracts Service division, CAS numbers serve as an unambiguous way to identify a specific chemical compound regardless of how many different names, synonyms, or naming conventions exist for it. For peptides, the CAS number provides a universal reference that links a specific peptide to its published research, safety data, and regulatory information across databases worldwide.
CAS Number Format
CAS numbers are written as a series of digits separated by hyphens, in the format XXXXXXX-YY-Z. The first part can contain up to seven digits, the second part contains two digits, and the final single digit is a check digit used to verify the number's validity. For example, the CAS number for insulin is 11061-68-0, and for oxytocin it is 50-56-6. Each CAS number is unique to a single substance, meaning that different salt forms, stereoisomers, or modifications of the same base compound will each receive their own distinct CAS number.
Why CAS Numbers Matter for Peptide Research
CAS numbers are invaluable tools for researchers working with peptides. They eliminate ambiguity when ordering, referencing, or searching for information about a specific compound. A peptide may be known by its generic name, brand names, abbreviations, or systematic IUPAC nomenclature, but the CAS number ensures that all parties are referring to exactly the same substance. When reviewing literature, checking regulatory status, or sourcing peptides from different suppliers, using the CAS number is the most reliable way to confirm compound identity.
Finding CAS Numbers
CAS numbers for research peptides can be found on product pages, Certificates of Analysis, Safety Data Sheets (SDS), and in scientific databases such as PubChem, SciFinder, and the CAS Common Chemistry registry. Pure U.S. Peptides includes the CAS number on product listings where available, helping researchers cross-reference their purchases with published literature and regulatory databases efficiently.