GLP-1 & Metabolic
RS-MX4 12.5 mg / 2.5 mg
Research use only
LY3437943: ~4731.3 AM833: ~4006.4 g/mol, CAS LY3437943: 2381089-83-2 AM833: 1415456-99-3. 1 current lot certificate on file; lot MX415-0803 measured 99.70% by RP-HPLC (214 nm) on 17 August 2026.
Strength
12.5 mg / 2.5 mg
$285.60
per vial · $19.04 per mg
Prices shown are what you pay at checkout, with no account needed. Buyers with a Restate account may see their own pricing when signed in.
1
Measured on lot MX415-0803
17 August 2026- Identity
- LY3437943, AM833
- Content
- 12.59, 2.61 mg
- Overall Purity
- 99.70%
- Endotoxin
- <0.05 EU/mL
- Heavy Metals
- <0.01 ppm
Reported by Bioviridian Inc. on certificate COA7594. The vial is labelled 12.5 mg / 2.5 mg; the laboratory quantified 12.59, 2.61 mg.
A lot’s own chromatogram is printed on its Certificate of Analysis.
- Form
- Lyophilized powder vial
- Documentation
- 1 current lot certificate on file. View lot documentation
- Shipping
- Ships from the US in protective packaging with tracking
What RS-MX4 is
Blend of LY3437943, a synthetic 39-residue GIP/GLP-1/glucagon triple receptor agonist (CAS 2381089-83-2, about 4731.3 g/mol), with AM833, a long-acting synthetic amylin analog (CAS 1415456-99-3). The two peptides act at different receptors, the three incretin and glucagon receptors and the amylin receptor. Studied in metabolic research models. Supplied together in a single lyophilized vial; purity by HPLC with a certificate of analysis for every lot.
RS-MX4 in the literature
RS-MX4 brings together the two most structurally distinct peptides in the metabolic range. LY3437943 is a synthetic 39-residue GIP/GLP-1/glucagon triple receptor agonist (CAS 2381089-83-2, about 4731.3 g/mol), while AM833 is a long-acting synthetic amylin analogue (CAS 1415456-99-3) listed on the certificate as a 32-residue chain of about 4006.4 g/mol. One acts across the three incretin and glucagon receptors, the other at the amylin receptor, so the literature studies them as ligands of four separate targets in metabolic research models. RS-RTA-3 and RS-AMR1 carry each peptide alone. Handling and documentation notes for the larger component are in Buying LY3437943: Strengths, Documentation and Handling.
RS-MX4 in the catalogue
A single listing covers RS-MX4: 12.5 mg of LY3437943 with 2.5 mg of AM833 in one vial at $285.60, or $19.04/mg over the 15 mg of combined peptide, and that is the entry size by default. The product belongs to the GLP-1 & Metabolic category; it is not contained in any bundle, and no companion product is recorded as commonly ordered with it. It is sold as research use only, for buyers aged 21 or over. You can compare the lot number on the label with the two published certificates in your account.
On the certificate
Certificate COA7594 is the current one for RS-MX4; Bioviridian Inc. tested lot MX415-0803 at the 12.5 mg / 2.5 mg strength on 17 August 2026 and reported 99.70% purity. The panel on the sheet lists identity, content, overall purity, endotoxin and heavy metals, and two certificates have been issued for the product, one of them current. The vial holds a lyophilised powder. Storage per the catalogue record is −20°C with protection from light and moisture, then refrigeration at 2–8°C once in solution. The certificate for the shipped lot is in the box and stays in the buyer's account.
RS-MX4 specification
- Purity
- ≥99% by HPLC · certificates on file
- Molecular formula
- LY3437943: per COA (C20-diacid conjugate) AM833: C194H308N56O59
- Molecular weight
- LY3437943: ~4731.3 AM833: ~4006.4 g/mol
- Amino acid count
- LY3437943: 39 AM833: 32
- Sequence
- LY3437943: 39-residue GIP/GLP-1/glucagon triple agonist (per COA) AM833: 32-residue long-acting amylin analogue (per COA)
- Synonyms
- Tri-agonist / AM833 blend
- Physical form
- Lyophilized powder
- Solubility
- Soluble in bacteriostatic water; consult the product COA for specific solvent recommendations.
- Storage
- Store lyophilized at -20°C; protect from light and moisture. Reconstitute with bacteriostatic water; refrigerate reconstituted solution at 2-8°C.
Lot documentation for RS-MX4
Each lot has its own Certificate of Analysis. Match the lot number printed on your vial to open the certificate for it.
StrengthLotPurityTestedStatusCertificate
Safety Data Sheet SDS-AP-MX4 · v1.0
Open the safety data sheet (PDF)Reading on RS-MX4
Complete the order
Reconstitution solution and bacteriostatic water, ready in the same order.
Questions about RS-MX4
Is LY3437943 / AM833 third-party tested?
Yes. Every lot of LY3437943 / AM833 (CAS LY3437943: 2381089-83-2 AM833: 1415456-99-3) is tested for identity and purity to ≥99% by HPLC, and a lot-matched Certificate of Analysis is available for each batch.
Can I review the Certificate of Analysis before ordering?
Yes. The certificates for current lots of RS-MX4 are listed on this page under Lot documentation, each with the identity, content and purity results the laboratory reported. If the lot or strength you need is not listed, ask support what is on file before you order.
Who can order LY3437943 / AM833 12.5 mg / 2.5 mg?
Restate Health supplies qualified researchers, laboratories, and other qualified purchasers only — for research use only. Accounts are verified before ordering is enabled, and this product is not sold to the general public.
How should it be stored and handled?
Supplied as lyophilized powder. Store lyophilized at -20°C; protect from light and moisture. Reconstitute with bacteriostatic water; refrigerate reconstituted solution at 2-8°C. Soluble in bacteriostatic water; consult the product COA for specific solvent recommendations.
How quickly does it ship?
Orders confirmed before 12pm CT typically ship the same business day from our U.S. facility with tracking. Restate Health can confirm current lead time and cold-chain handling for your account.
What did the laboratory measure on the current lot of RS-MX4?
Lot MX415-0803 (12.5 mg / 2.5 mg) was tested on 17 August 2026 by Bioviridian Inc. and reported identity LY3437943, AM833 (LC-MS/MS), content 12.59, 2.61 mg (HPLC Quantitation), overall purity 99.70% (RP-HPLC (214 nm)), endotoxin <0.05 EU/mL (<USP85>), heavy metals <0.01 ppm (<USP232>). The certificate is COA7594 and is published in full on this page. Read the certificate for the lot number printed on your vial.
What are the chemical identifiers for RS-MX4?
For RS-MX4, its CAS number is LY3437943: 2381089-83-2 AM833: 1415456-99-3, its molecular formula is LY3437943: per COA (C20-diacid conjugate) AM833: C194H308N56O59, its molecular weight is LY3437943: ~4731.3 AM833: ~4006.4 g/mol. It is also catalogued as Tri-agonist / AM833 blend. Identity was confirmed as LY3437943, AM833 on lot MX415-0803 by LC-MS/MS.
Handling RS-MX4
One sealed vial per unit ordered, labelled with the compound name, the strength and the lot number, and shipped from the US with tracking. The lot number on the label is what opens its certificate — lot MX415-0803 is COA7594, and any lot can be checked on the verify page.
For laboratory research use only. Not for human or veterinary use.
