Hexarelin Specs: Sequence, MW & CAS
Part of the full Hexarelin guide - a growth-hormone-releasing peptide reference compound, identity-verified with a COA on every vial.
In brief
This spoke interprets hexarelin's identity data - sequence, molecular weight, formula, and CAS number - and connects each structural feature to the function described elsewhere in the entry. All values are quoted directly from the source.
To the molecule
Molecular specifications
His-D-2-Methyl-Trp-Ala-Trp-D-Phe-Lys-NH2The detail
A closer look
01
Sequence and the meaning of a hexapeptide
The sequence is His-D-2-Methyl-Trp-Ala-Trp-D-Phe-Lys-NH2: six amino-acid residues, which is what 'hexapeptide' in the peptide-class designation refers to. Reading N- to C-terminus the residues are histidine, D-2-methyl-tryptophan, alanine, tryptophan, D-phenylalanine, and lysine. The terminal '-NH2' denotes a C-terminal amide (amidation) rather than a free carboxyl group, a common feature of bioactive peptides that the sequence notation makes explicit.
02
Structure-function: the position-2 and position-5 modifications
Two residues are non-standard and load-bearing. The D-2-methyl-tryptophan at position 2 and the D-phenylalanine at position 5 are, per the entry, the modifications that confer resistance to enzymatic degradation and help shape receptor affinity. The D-configuration (rather than the natural L-) at these positions is what makes the peptide a poorer protease substrate. The position-2 modification is also called out separately as a 'key modification' in the entry's facts (sourced to Cayman Chemical), underscoring its importance to the molecule's identity.
03
Molecular weight and formula
The molecular weight is 887.04 g/mol and the molecular formula is C47H58N12O6 (47 carbons, 58 hydrogens, 12 nitrogens, 6 oxygens). The high nitrogen count is consistent with a multi-residue peptide containing tryptophan and histidine side chains. The molecular weight is the quantity used for all concentration-to-molarity conversions in laboratory handling, and the entry attributes the value to ChemicalBook / Cayman.
04
CAS number as the unique identifier
The CAS Registry Number 140703-51-1 is the unambiguous chemical identifier for hexarelin, distinguishing this specific hexapeptide (with its exact sequence and modifications) from related GHRPs in catalogs and reagent records. Paired with the sequence and formula, it pins the compound's identity for procurement and reference.
The fine print: products are sold for laboratory research use only and are not for human or animal consumption. Bodily introduction into humans or animals is strictly prohibited by law. Hexarelin is not a drug and is not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the FDA.