Product Specification and Identity Standards
Use the product specification to check the material name, chemical form, amount per container and tests that apply to a particular presentation. To find out what was actually measured, match that specification to the report for the supplied lot.
Request a specificationSeparate the compound, product and lot
Start with the compound index for names and molecular background. Use the catalogue for the presentation being offered. Then check the product specification for the defined form and quantity basis, and the lot report for the measured result.
For example, a reference molecular weight may describe the parent peptide while the supplied material contains a counter-ion and water. State the basis beside the value and identify the supplied form separately. Do not silently treat a parent-compound value as the mass of a fully defined salt or hydrated material.
Check the specification fields together
| Field | What needs to be clear | What does not resolve it |
|---|---|---|
| Identity | Canonical name and the applicable structure or sequence, including relevant terminal groups, stereochemistry or modifications | A short name or identifier without a clear connection to the intended entity |
| Chemical form | Declared salt or counter-ion, and the basis of any formula or molecular-weight value | Assuming a fixed counter-ion ratio or water content from the salt name alone |
| Quantity and fill | Amount, unit, per-container basis and whether the claim concerns gross material, peptide content or a defined target-compound quantity | Treating a nominal milligram label as a measured assay result |
| Blend composition | Each component's identity, stated quantity or ratio, and the basis of the total | A blend name or combined total without its component breakdown |
| Appearance and formulation | Applicable appearance description, declared added ingredients and container presentation | Using colour or powder volume as chemical identification or proof of fill |
| Tests and criteria | Named attributes, linked analytical procedures, acceptance criteria and reporting bases | A purity threshold used as a substitute for every other requirement |
| Storage and dating | Applicable conditions, container state and any supported expiry or retest information | Copying conditions from a reference compound or a different product |
A CAS number can help identify a referenced entity, but the specification still needs to make clear which entity or form it denotes. For peptide forms, read salt forms and counter-ions alongside the declared composition.
Make the quantity basis explicit
The mass of all material in a container can include water and counter-ions. Net peptide content describes the peptide fraction, which can include other peptides as well as the intended one. Ask which of these quantities a milligram claim describes before using it in a calculation. [A4]
In the fictional example “Peptide P, 10 mg, acetate”, the name, nominal mass and salt description each leave a different question open. The table shows what to request for each field.
| Unanswered field | Clarification needed |
|---|---|
| The identity behind “Peptide P” | Defined sequence or structure and relevant modifications |
| The meaning of “10 mg” | Per-container quantity and whether it refers to gross material, peptide content or the intended compound on a stated basis |
| The composition behind “acetate” | Declared form and any measured counter-ion information; no assumed fixed ratio |
| Whether the lot meets the specification | Applicable methods, criteria and lot-linked results |
The BPC-157 5 mg + TB-500 5 mg blend lists 5 mg of each component, or 10 mg total nominal material. Check the specification for each component’s identity and fill basis, then look to the lot report for any measured quantities. The net peptide content guide explains why a purity percentage cannot supply a missing mass.
Read requirements separately from results
ICH Q6A describes a pharmaceutical specification as a set of tests, procedures and acceptance criteria. On a research-material document, those fields tell you what to compare. The report for the lot must supply the result. [A1]
Keep a stated requirement separate from the result obtained for a lot. Record whether a value is a nominal claim, an acceptance limit, a measured result or an unresolved field. The analytical methods page explains method limitations, while common impurities covers questions that a simple purity headline may leave unanswered.
Request the applicable version
On the contact form, choose Technical or product documentation. Include the product link, stated fill and lot if known. Name the unresolved field, for example “Does the stated amount refer to gross material or peptide content?” Ask which specification revision applies.
If the label and specification appear to disagree, quote both entries exactly. The quality and batch documentation hub can help you identify whether the next record to request is a corrected specification, a lot report or a release decision.
References
These references explain specification structure and peptide-content terminology. The catalogue example uses the listed amounts. No measurement of either component is implied.
- [A1] ICH Q6A, Specifications Section 1.2 explains how tests, procedures and acceptance criteria define a pharmaceutical specification.
- [A4] Bachem, Quality Control of Amino Acids & Peptides The discussion of net peptide content explains which material contributes to the peptide fraction.