The somatropin CAS number is 12629-01-5. For researchers and informed lab buyers, that identifier is useful because it gives a standardized reference point when comparing product labels, analysis documents, inventory records, and supplier specifications. It is not a shortcut for confirming quality, but it is a practical first check that helps ensure everyone is referring to the same material.
Somatropin is a recombinant form of human growth hormone with a defined 191-amino-acid sequence. Because peptide and protein products can be described with several names, a CAS Registry Number helps reduce ambiguity in research documentation and purchasing workflows. The right CAS number supports cleaner recordkeeping. The rest of the verification process determines whether a specific vial or lot meets the quality standard your work requires.
Somatropin CAS Number: 12629-01-5
CAS Registry Number 12629-01-5 is assigned to somatropin. A CAS number is a numeric identifier created to distinguish a chemical substance or defined material from others that may have similar names, alternate spellings, trade names, or technical descriptions.
The number is formatted in three groups: 12629-01-5. The final digit is a check digit used to validate the sequence mathematically. That formatting detail may seem minor, but transcription errors are common when product data is copied between labels, spreadsheets, certificates, and purchase records. A misplaced digit can point a researcher toward the wrong reference material.
For day-to-day purchasing, treat the CAS number as a cataloging and identity tool. It can help match a supplier listing to internal documentation, but it should never be the only criterion used to assess a product.
Why a CAS identifier is useful for somatropin
Somatropin may appear in research records under a range of descriptions, including recombinant human growth hormone, human growth hormone, HGH, or its formal protein designation. Those labels can be useful in context, yet they are not always precise enough for procurement and documentation. A recognized CAS identifier creates a common reference across those naming differences.
That is especially helpful when researchers are comparing multiple supplier records, organizing compound inventories, reviewing external literature, or confirming that a certificate of analysis corresponds to the material ordered. It also reduces confusion between somatropin and other growth hormone-related materials that are not identical in sequence, source, formulation, or intended research application.
The CAS number does not define vial size, concentration, fill weight, excipients, reconstitution requirements, storage conditions, or testing status. Those details must be verified separately on the product listing, label, and lot-specific documentation.
What the Somatropin CAS Number Does Not Confirm
A CAS number tells you what material a record is intended to identify. It does not tell you whether a particular lot has been correctly produced, stored, handled, shipped, or tested. Two listings can display the same somatropin CAS number while offering very different levels of documentation and quality control.
For research buyers, this distinction matters. A polished label with the correct identifier is useful, but it is not equivalent to visible analysis. The stronger approach is to use the CAS number as the starting point, then verify the lot-level information that supports identity and quality.
Look for documentation that clearly connects the tested material to the exact batch available for purchase. Relevant records commonly include the lot number, test date, method details, identity findings, and purity results where applicable. If a report is generic, undated, or cannot be matched to the item in inventory, it provides less confidence than a current, traceable document.
A practical buyer also checks whether the supplier presents product details consistently. The compound name, CAS number, vial format, lot reference, and analysis information should not conflict. Small mismatches can be clerical, but they deserve clarification before an order is placed.
CAS number versus lot number
The CAS number and lot number serve different jobs. The CAS number identifies the substance category. The lot number identifies a specific manufacturing or packaging batch. If you need to review testing, trace an item in your lab records, or compare results across purchases, the lot number is the field that connects those records to a particular unit of material.
Think of the CAS number as the shared product reference and the lot number as the specific traceability reference. Both should be present in a quality-focused sourcing process. Neither replaces the other.
This is also why a product page should not rely on a CAS number alone as proof of purity. Identity, purity, and traceability are related, but they are not interchangeable claims.
A Practical Verification Process for Research Buyers
Before purchasing somatropin for research, start by confirming that the listing identifies the compound clearly and uses CAS 12629-01-5 consistently. Then move beyond that initial check. Review available lab analysis and determine whether it is tied to the current lot or batch offered for sale.
Next, compare the listing details with your own purchasing requirements. Confirm the vial quantity, stated contents, packaging format, storage information, and any handling details needed for your research workflow. This prevents a common procurement issue: ordering a correctly identified compound in a format that does not match the planned work.
Keep copies of the product information and analysis records with the lot number in your internal files. This takes little time at the point of purchase and makes later inventory checks far easier. If your lab tracks materials in a spreadsheet or inventory platform, include the compound name, CAS number, supplier, order date, lot number, and analysis reference as separate fields.
Finally, evaluate the supplier rather than the product page alone. Clear policies, responsive order support, current analysis visibility, careful packaging practices, and consistent inventory information are all useful signs. Quality-focused suppliers understand that experienced buyers are not looking for vague reassurance. They want product details that can be checked.
Common Somatropin Identification Mistakes
One frequent mistake is treating a CAS number as a purity claim. It is not. CAS 12629-01-5 may be accurate on a label, while the buyer still lacks evidence regarding the specific material in the vial. Research sourcing requires both correct identification and lot-level verification.
Another issue is assuming that closely related names always describe the same item. Product naming can vary across suppliers and documents, especially when abbreviations are involved. Use the complete compound description, CAS number, and available sequence or analytical information together when a comparison matters.
Buyers can also overlook the date of a report. A test result may be legitimate while referring to an older batch that is no longer available. The best documentation makes it easy to see what was tested and whether that test applies to the inventory currently being sold.
Storage and fulfillment details deserve the same attention. Sensitive research materials need appropriate handling from fulfillment through receipt. A supplier’s analysis may be strong, but reliability also depends on how the product is packaged, dispatched, and supported after purchase.
Build Better Records From the First Order
Using the somatropin CAS number correctly is straightforward: record 12629-01-5 as the standardized identity reference, then document the specific lot and supporting analysis for the material you receive. This approach improves consistency when multiple researchers, orders, or storage locations are involved.
At Biotech Labz Supply, the focus is on making research sourcing more direct with a curated selection, visible lab analysis, and dependable fulfillment. For buyers comparing somatropin listings, clear identification and traceable documentation should be baseline expectations, not optional extras.
The right CAS number gets your records pointed in the right direction. The supplier’s lot-level transparency, testing visibility, and handling standards are what help you make a purchase decision with confidence.
