What is a COA?
A certificate of analysis tells you what is in a batch and how it was measured. How to read one, and how to check that it belongs to your vial.
- Purity
- ≥99% HPLC
- COA
- per batch
- Strength
- 1 mg
IGF-1 LR3
IGF-1 LR3 is a polypeptide of 83 amino acids, a variant of human IGF-1 with arginine at position 3 and a 13-amino-acid N-terminal extension. Buy IGF-1 LR3 for laboratory research from PulseChem: 1 mg of lyophilized powder per vial, ≥99% purity by HPLC and a COA for every batch.
€66.95 incl. VAT · €55.33 excl. VAT
Out of stock
This product is temporarily unavailable. More in Growth hormone
Volume discount
- 1–4 unitsUnit price€66.95 per unit
- 5–9 units5% off€63.60 per unit
- 10+ units10% off€60.26 per unit
Research Use Only. For laboratory research use only (in vitro). Not for human or animal use. The products are not medicines, foods, or cosmetics. They are not intended to diagnose, treat, cure, or prevent any disease. The information on this website has not been evaluated by the EMA, the Romanian National Agency for Medicines and Medical Devices (ANMDMR), or the FDA. Read the RUO policy
How is a solution prepared?
This is how solutions are prepared in the lab.
Step 1 of 8: Disinfect
The stoppers of both vials are wiped with an alcohol swab.
- Disinfect. The stoppers of both vials are wiped with an alcohol swab.
- Draw up. The needle passes through the stopper of the bacteriostatic water and the plunger draws up liquid.
- Transfer. The liquid runs down the inside wall of the vial with powder.
- Mix. The vial is gently swirled until the solution is clear.
- Done. The solution is ready for use in research.
- Take sample. A new needle passes through the stopper and the plunger draws up part of the solution.
- Sample vial. The solution runs through the septum of the screw cap into a sample vial.
- Analyze. The sample vial goes into the autosampler; the instrument measures the solution in vitro.
For laboratory research use only (in vitro). Not for human or animal use.
Batch and COA
The batch number is on the vial label. You can find the certificate of analysis for that batch on the Lab results page or request it from us.
Specifications
| Contents | 1 mg per vial |
|---|---|
| Purity | ≥99% (HPLC) |
| Intended use | For laboratory research use only (RUO) |
About IGF-1 LR3
Buy IGF-1 LR3 from PulseChem
PulseChem supplies IGF-1 LR3 in 1 mg vials: lyophilized (freeze-dried) powder in sealed glass. The label shows the strength and the batch number, and the same number appears on the certificate of analysis for the batch.
IGF-1 LR3 for sale here can be ordered as a guest or with an account. Anyone aged 18 or over who buys for laboratory research can order; you confirm research use at checkout. IGF-1 LR3 is temporarily out of stock.
What is IGF-1 LR3?
IGF-1 LR3 is derived from human IGF-1, a protein of 70 amino acids (UniProt P05019). Position 3 carries arginine instead of glutamic acid, and an extension of 13 amino acids sits at the N-terminus. Francis and colleagues described this variant in 1992 in the Journal of Molecular Endocrinology, under the name Long [Arg3]-IGF-I, which is what LR3 stands for.
PubChem has no reliable record for IGF-1 LR3, which is why this page shows no molecule drawing. IGF-1 LR3 is not authorized as a medicine.
Purity and COA for every batch
An external laboratory measures purity by HPLC (≥99%) and identity by mass spectrometry. Because this page shows no molecule, the COA is where you find the measured mass and the identity of your batch. Look up the COA by batch number under Lab results.
Storage and shipping
Keep the vial closed, cool, dry and dark, as the label and COA specify. Shipping is from Europe, in insulated packaging with track and trace and a cold pack in warm weather. Anything received and paid before 3 p.m. Central European time on a working day is sent the same day; delivery takes 1–3 working days within Europe. EU only.
For laboratory research only, not for human or animal use.
Questions about IGF-1 LR3
Where can I buy IGF-1 LR3?
IGF-1 LR3 is available from PulseChem in this web shop. A 1 mg vial costs €66.95 including VAT, and IGF-1 LR3 is temporarily out of stock. Orders received and paid before 3 p.m. Central European time on a working day go out the same day; delivery takes 1–3 working days within Europe. Every batch comes with a COA.
What is in a vial of IGF-1 LR3?
A vial of IGF-1 LR3 contains 1 mg of lyophilized (freeze-dried) powder in sealed glass. The label states the strength and the batch number. Under Lab results that number leads to the COA for the batch, with the measured purity and mass.
How is the purity of IGF-1 LR3 tested?
An external laboratory determines the purity of IGF-1 LR3 for every batch by HPLC: ≥99%. Mass spectrometry confirms the identity. With electrospray ionization, a protein of this length gives a series of peaks with different charge states, from which the mass is calculated. Both measurements are on the COA for the batch.
What is the difference between IGF-1 LR3 and IGF-1?
IGF-1 LR3 has 83 amino acids, human IGF-1 has 70 (UniProt P05019). The difference lies in two changes: an extension of 13 amino acids at the N-terminus and arginine instead of glutamic acid at position 3 of the IGF-1 chain. Francis and colleagues described this variant in 1992 in the Journal of Molecular Endocrinology.
Background from the knowledge base
What does 99% purity mean?
A purity of 99% tells you about the composition of the peptide, not about the amount in the vial. What the number measures, and what it does not.
Why lyophilize?
Peptides are supplied as a freeze-dried powder because they break down quickly in solution. What happens during freeze-drying, and what it means for storage.
