- Peptide
- A molecule built from amino-acid residues linked by peptide bonds. Sequence and modifications define the individual material.
- Amino acid
- A building block of peptides and proteins. Its position and chemical form contribute to molecular identity.
- Peptide sequence
- The ordered list of amino-acid residues. Record terminal and other modifications alongside the sequence.
- HPLC
- High-performance liquid chromatography: a separation method used in analytical characterization. Reported purity depends on the method and detection conditions.
- Mass spectrometry
- An analytical approach that measures mass-to-charge ratios. Results can support molecular identity when interpreted with the method and expected ions.
- LC-MS
- Liquid chromatography coupled to mass spectrometry, combining separation with mass-based detection.
- CoA
- Certificate of Analysis: a batch-linked document reporting specified tests and results. Its scope depends on the tests actually performed.
- Batch / lot
- An identifier that connects a material to its production and analytical records.
- Purity
- A method-dependent assessment of material composition. An HPLC percentage does not by itself establish net peptide content, sterility or endotoxin status.
- Net peptide content
- The peptide portion of a preparation, distinguished from water, counterions and other non-peptide components.
- Lyophilized
- Freeze-dried. This describes a preparation format, not a guarantee of purity, sterility or long-term stability.
- Reconstitution
- The preparation of a solution from a dried material using a suitable solvent and a material-specific laboratory procedure.
- Solubility
- The extent to which a substance dissolves under specified conditions. Solvent, temperature and pH can affect it.
- Aliquot
- A measured portion transferred from a larger sample, often to organize an experiment or limit repeated handling.
- Concentration
- The amount of material per unit volume. Always state the units and the basis used for the amount.
- Counterion
- An ion associated with a charged molecule. Counterions can contribute to a preparation’s gross mass.
- CAS number
- A registry identifier used to distinguish chemical entries. Verify that it matches the exact form being specified.
- Molecular formula
- A notation describing elemental composition. It is not a substitute for a full structural specification.
- Molecular weight
- A mass-based molecular property. Confirm whether a document reports an average, monoisotopic or measured value.
- RUO
- Research Use Only. A material designation that does not establish suitability for human or veterinary administration.
- In vitro
- An experiment performed outside a living organism, such as in a controlled cellular or biochemical system.
- Control
- A comparison condition used to help interpret an experiment and distinguish the effect under investigation from other influences.
- Endotoxin
- A bacterial component that may require a separate analytical assessment. Chromatographic purity does not establish its absence.
- Sterility
- A microbiological quality attribute requiring an appropriate assessment. It cannot be inferred from a clean appearance or high HPLC purity.
- Bacteriostatic water
- Water formulated with a bacteriostatic preservative. Intended use, composition and compatibility must be checked on the actual product label.
- Blend
- Two or more components supplied together in a defined formulation. Component identity and amount should be stated individually.
- Bundle
- A set of separate products grouped for procurement. It should not be confused with a premixed formulation.
- Traceability
- The ability to connect a sample to its identity, batch, documentation and handling records.
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