Per vial, USD
| Fill weight | 100+ | 1,000+ | 2,500+ | Order |
|---|---|---|---|---|
| 1 mg | $26.25 | $22.05 | $21.53 |
Ordering at volume
Two things set this line apart from everything else in the section. The first is scale: at nearly twice the mass of the largest peptide here, the material in the vial dominates the per-vial figure completely, and no amount of vialing efficiency shifts it much. The second is that our data holds no settled fill for the line, so how much goes in each vial is agreed on the written quote rather than picked from a published list.
Because the fill is set at quote, the usual advice about choosing between published fills does not apply here — you specify what the work needs and the rate is built around that. What is worth stating early is the total mass you expect to move in a year, not merely the size of the first order. On a line where material dominates cost, the difference between quoting one order and quoting a year of them is far larger than it is on the small amides.
It sits at standard depth, stocked rather than synthesized against each order, and it is a single line with no fill splitting, so vial count and break are one conversation rather than several. Give the incoming check real attention on a first order: this is the most delicate material in the section, and a slumped cake or a seal that has lifted matters more here than it would on a small peptide that would shrug the same journey off.
Specification
- Compound
- IGF-1 LR3
- CAS number
- 946870-92-4
- Formula
- C₄₀₀H₆₂₅N₁₁₁O₁₁₅S₉
- Molecular weight
- ~9,117 Da
- Form
- Lyophilized powder, sealed vial
- Fill weights
- 1 mg
- Stock depth
- Standard catalog — Stocked in California. Each compound reaches its own tier break.
- Intended use
- Laboratory research only. Not for human or veterinary use.
What the material is
IGF-1 LR3 is an 83-residue analogue of insulin-like growth factor 1, differing from the parent sequence in two respects: arginine occupies position 3, and a 13-residue extension is carried at the N-terminus. Those two changes are exactly what the LR3 designation records — the long extension and the arginine substitution — and they are why the same material travels through the trade as Long Arg3 IGF-1. Its mass is about 9,117 Da.
At 83 residues this is a small protein rather than a short synthetic peptide, which is the single most useful thing to know about both handling it and buying it. It is roughly thirteen times the mass of ipamorelin and nearly twice that of the largest analogue in this section. It ships as a white lyophilized cake in a sealed vial, and material at this scale is less forgiving of warmth, moisture and rough treatment than the small amides are.
Storage and reconstitution
Hold this line at −20 °C in a dark, dry freezer. Refrigeration is acceptable for short holds but is not where this material should live, because a small protein loses condition faster at 4 °C than a short amide does. Bring a vial up to ambient temperature while it is still closed, or moisture finds the cake the instant it is opened.
Dissolution is gentle: a buffer appropriate to the assay, or sterile water, run down the wall of the vial and left to work. A protein of this size is not shaken or vortexed, since the air-liquid interface is where aggregation begins. In solution it holds at 2–8 °C in the dark for a short working window and should be aliquoted rather than put through repeated freeze-thaw cycles.
Buying questions
Is Long Arg3 IGF-1 the same material as IGF-1 LR3?
Yes, one material under two names. LR3 is the shorthand; Long Arg3 spells out the N-terminal extension and the position-3 substitution that define the analogue. We hold both as one line, so a purchase order using either name reaches the same order code.
How is the fill specified when ordering IGF-1 LR3?
You say what the work needs and it is fixed on the quote. This line carries no standing fill in our published data, so the quantity per vial is agreed in writing beside the order code. The ordering walkthrough lists what else belongs on a first purchase order.
Does IGF-1 LR3 need more careful handling than the short peptides in this section?
Yes. At 83 residues it is a small protein, and small proteins tolerate warmth, moisture and rough handling far less well than a five- or six-residue amide. Keep it frozen, dark and sealed until the moment of use, and photograph anything that looks wrong before opening the rest of a shipment.
Can IGF-1 LR3 be quoted as an annual programme rather than a single order?
Ask, because on this line it is worth stating. Material cost dominates the vial here, so a known annual quantity is the figure most worth putting on the quote request, and contract terms begin past ten thousand vials of a single compound. The pricing page explains the published breaks below that point.
