A human growth hormone cas number is a fast way to confirm that a catalog entry is pointing to the intended material, but it should never be the only detail reviewed before ordering. The CAS Registry Number commonly associated with human growth hormone, also called somatropin in many research catalogs, is 12629-01-5. For researchers working from product listings, COAs, and inventory records, that number provides a useful starting point for identity verification.
The key word is starting point. A CAS number identifies a registered substance entry. It does not confirm a vial’s contents, purity, fill weight, handling history, or lot-specific test results. Those decisions still come down to documentation, supplier standards, and careful label review.
Human Growth Hormone CAS Number: 12629-01-5
CAS stands for Chemical Abstracts Service. A CAS Registry Number is a numerical identifier assigned to a substance in the CAS database. It is designed to reduce ambiguity when a material has several names, abbreviations, or naming conventions.
For human growth hormone, 12629-01-5 is the CAS number generally used for the 191-amino-acid protein commonly listed as somatropin or growth hormone, human. Catalog language can vary, especially across suppliers and research databases. One listing may use the full name, while another may use an abbreviation such as HGH or hGH. The CAS number helps connect those naming variations to the same general substance record.
The three blocks in a CAS number have no scientific meaning on their own. They are not a sequence code, a molecular-weight code, or a measure of grade. The final digit is a check digit used to help validate that the number has been written correctly. For buyers, the practical value is simple: it makes searching, documenting, and cross-checking more precise.
Why the Number Matters in Research Purchasing
Peptide and protein catalogs are full of closely related names. A quick name match is not always enough, particularly where abbreviations are involved. Human growth hormone can be described by its common name, its recombinant designation, its protein name, or a supplier-specific product title. A CAS number gives researchers a stable reference point when reviewing a listing.
That said, a stable reference is not the same as a complete product specification. Large peptide-based materials require more than a registry number to evaluate accurately. The listed sequence, molecular mass, format, concentration or fill amount, and lot documentation all matter. If any of those items conflict with the stated identity, the CAS number alone cannot resolve the issue.
A strong product review looks for consistency across the entire record. The product title should align with the CAS number. The label should match the catalog description. The lot-specific analysis should correspond to the actual item being sold, not a generic sample report that cannot be connected to the current inventory.
CAS Number vs. Lot Analysis
This distinction is where many buyers save time and avoid confusion. The human growth hormone CAS number identifies the substance category. A certificate of analysis, or COA, documents characteristics of a particular batch. These are separate functions, and neither replaces the other.
A CAS number can be copied into a listing with little effort. Lot-level analysis requires actual work: sample handling, analytical review, batch tracking, and clear recordkeeping. That is why visible lab analysis is a more meaningful quality signal than a CAS number standing alone.
For a research buyer, the practical question is not only, “Does this catalog page show 12629-01-5?” It is also, “Can the supplier connect this exact lot to clear analysis and product details?” When the answer is yes, the buyer has a better basis for inventory planning and research documentation.
Do Not Confuse Related Growth Hormone Terms
The terminology around growth hormone-related materials can create avoidable ordering errors. The full-length human growth hormone protein is not interchangeable with every compound that references growth hormone activity, fragments, secretagogues, or releasing-hormone analogs.
A fragment is a shorter portion of a larger peptide or protein sequence. A releasing-hormone analog is a separate compound designed around a different sequence and mechanism. A secretagogue is also a different material. Each may have its own name, molecular profile, and CAS Registry Number. Similar marketing language or shared abbreviations do not make them identical.
This is especially relevant when browsing a supplier catalog quickly. Researchers should compare the exact compound name and the CAS number before assuming two entries are substitutes. Where the material is full-length somatropin, the commonly referenced CAS number is 12629-01-5. If the number differs, review the product identity closely rather than treating it as a minor label variation.
A Better Verification Process Before Ordering
For routine research procurement, an efficient check takes only a few minutes. Start with the exact product name, then confirm whether the human growth hormone CAS number shown is 12629-01-5. Next, review the format and stated amount to make sure they match the intended research requirements.
After that, check the available analysis documentation for lot relevance. Look for a lot or batch reference that can be tied to the item in stock. Generic reports can still provide context, but current lot documentation offers stronger traceability. If a product page provides analysis visibility, confirm that the report identifies the material consistently rather than relying only on a broad category name.
Finally, consider how the material will be recorded once received. A clean internal record should include the product name, CAS number, supplier, lot number, listed amount, date received, and any associated analysis documentation. This is not unnecessary paperwork. It makes future comparisons much easier, particularly when repeat orders, multiple batches, or adjacent compounds are involved.
What a CAS Number Cannot Tell You
A CAS number is useful, but it has clear limits. It cannot tell you whether a product has been stored correctly. It cannot establish current inventory status, container integrity, purity, or whether the listed amount has been independently verified. It also cannot indicate whether a supplier’s documentation practices are consistent from one lot to the next.
For protein-based research materials, these limits matter. The product identity may be right while the supporting details are incomplete. That is why careful buyers give more weight to a combination of factors: a precise listing, transparent analysis, traceable batch records, and a supplier that handles fulfillment reliably.
Price should be considered in that same context. Discounted pricing for large-quantity orders can make sense for recurring research needs, but only after identity and documentation standards have been checked. Lower cost does not offset weak records when consistency is the real requirement.
Practical Takeaway for Catalog Review
When you see human growth hormone, HGH, hGH, or somatropin in a research catalog, use CAS 12629-01-5 as an identity cross-check. Then move beyond the number. Confirm the exact material, compare the product details to the label and lot analysis, and keep the documentation with your research records.
At Biotech Labz Supply, informed buyers can use that same approach across a curated research catalog: match the compound, review available lab analysis, and order with a clear record of what is being sourced. A CAS number gives you the reference point. Transparent, lot-specific information gives you the confidence to make the next decision.
