Know your peptide

Total transparency, vial by vial.

The exact specs behind every peptide we characterize - molecular weight, CAS number, amino-acid sequence, and molecular formula, in one place. No mystery, no guesswork - just clean, lab-tested reference data to read before you order.

Browse the charts ↓Research use only

HappyTides research vial beside a molecular characterization scene

COA-backed · USA-made

Library4 spec charts

SourceVerified dataset

MethodCross-peptide

UseIn-vitro reference

The reference library

Pick a spec, see the whole library

Each chart cross-lists one identity descriptor across every peptide we characterize, so you can compare values side by side instead of opening ten pages.

Molecular WeightPeptide Molecular Weight ChartMolecular weight (molar mass, in g/mol) is the summed atomic mass of a peptide and is the single most-used value in laboratory reconstitution math: it converts a lyophilized vial mass into a molar concentration. This chart lists the molecular weight of each peptide in the HappyTides reference library, calculated from its sequence and any modifications.Open chart →CAS NumberPeptide CAS Number IndexA CAS Registry Number is a unique identifier assigned by the Chemical Abstracts Service to a specific chemical substance, giving an unambiguous way to reference a compound across literature and documentation. This index lists the CAS number for each peptide in the reference library; some research peptides and complexes have no single assigned CAS RN.Open chart →SequencePeptide Amino-Acid Sequence ReferenceThe amino-acid sequence is a peptide's primary identity descriptor, read from the N-terminus to the C-terminus, and it determines molecular weight, folding, and receptor specificity. This reference lists the full sequence of each peptide in the library; modified residues and terminal groups are shown where present.Open chart →Molecular FormulaPeptide Molecular Formula IndexA molecular formula reports the count of each atom type (C, H, N, O, S) in a molecule and complements molecular weight as a compact identity and characterization descriptor. This index lists the molecular formula of each peptide in the reference library.Open chart →

Why we publish this

Characterization data, not claims

These values describe the molecule itself - what it is, what it weighs, how it is registered. Nothing here is a use, an outcome, or a dose.

Pure data

Every figure is read from the verified peptide dataset, not generated - accurate by construction and consistent across the library.

Reconstitution math

Molecular weight converts a lyophilized vial mass into a molar concentration - the single most-used value in laboratory reconstitution calculations.

Unambiguous identity

CAS numbers, formulas, and N-to-C sequences pin each compound to one identity so it reads the same across literature and documentation.

For in-vitro laboratory research use only. Not for human or animal consumption. Bodily introduction into humans or animals is strictly prohibited by law. These compounds are not drugs and are not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the FDA.