What Does IGF-1 LR3 Dissolve In? Solvents Explained
Solubility behaviour is where compounds in this library differ most sharply from one another. For IGF-1 LR3, the determining factors are structural: recombinant 83-residue protein analogue of igf-1.
In plain English
It does not dissolve well at neutral acidity. Acidifying first keeps it in solution. This is the opposite of every short peptide here, and it is the single most common mistake people make with it.
What IGF-1 LR3 actually is
IGF-1 LR3 is a modified version of insulin-like growth factor 1, a natural growth signal. Two changes were made so that carrier proteins cannot grab and hold it. Crucially, it is a genuine folded protein rather than a simple chain — and that changes every handling rule.
Supplied for laboratory research use only — not for human or animal use.
Third-party tested by HPLC and LC-MS, ≥99% purity, with a Certificate of Analysis on every order. Ships across Canada.
Technical detail below
How IGF-1 LR3 behaves in solution
This is the one compound in this catalogue that genuinely requires an acidic solvent. IGF-1 LR3 is a folded 83-residue protein with poor solubility at neutral pH and is conventionally dissolved first in dilute acetic acid or dilute HCl, then diluted into the working buffer. Attempting to dissolve it directly in plain water or PBS commonly produces incomplete dissolution or visible precipitate — this is expected chemistry, not a defective vial.
Typically prepared as a concentrated acidic stock, then diluted; avoid dilute storage.
Suitable solvents, in order
Structural basis
IGF-1 LR3 is recombinant 83-residue protein analogue of igf-1. IGF-1 LR3 is an engineered analogue carrying two changes to native IGF-1: an arginine substitution at position 3 and a 13-residue N-terminal extension. The Arg3 substitution is the functional one — it drastically reduces binding to IGF binding proteins, which normally sequester the great majority of circulating IGF-1. The result is a molecule that stays free rather than bound.
What IGF-1 LR3 is studied for
The Arg3 substitution reduces binding-protein affinity, which is the entire design rationale.
Widely used in cell-culture research as a growth-factor supplement.
Studied in muscle-biology research models.
The canonical downstream pathway examined in IGF-1 receptor research.
Summarizes published preclinical literature. Provided for research reference only; not a claim of efficacy or a description of human use.
More IGF-1 LR3 reference
Lyophilized and reconstituted storage conditions, plus the practical working window.
Diluent selection, dissolution behaviour, and the calculator preset for this compound.
The specific chemical routes by which this molecule breaks down, and how to limit each.
Which assays are informative for this molecule, and what to actually check on its COA.
Compound-specific bench practices, and the errors most often made with this molecule.
What to inspect on arrival, and which conditions actually warrant rejecting a vial.
Questions specific to this compound — structure, chemistry, and common misconceptions.
Solubility reference for other compounds
IGF-1 LR3 is supplied strictly as a research chemical for in-vitro laboratory and research use only. It is not intended for human or animal consumption, diagnostic, or therapeutic use. This page is educational laboratory-handling reference information — not medical advice, not usage guidance, and not a protocol.