Cosyntropin: ACTH fragment peptide.
Cosyntropin testing at Vanguard Laboratory: purity, quantity and identity from $250 per vial, with results in 3 to 5 business days; sterility 14 days.
On this page: Testing · Compound data · Sequence · How we test it · Forms and references · FAQ
Every package includes purity, quantity, identity and a solubility check. Raw powder purity is $200 for a 50 mg sample.
$250
$550
$700
Each test can be added to a package or ordered on its own. Results arrive in 3 to 5 business days.
Included in every package
How pure the Cosyntropin is and how much is in the vial: purity in area percent, quantity in mg per vial against the label. Details
Included in every package
Whether the sample contains Cosyntropin, compared with a reference standard. Reported as match or no match. Details
Quoted
Whether the molecular mass matches Cosyntropin, which helps catch look-alike products. Details
$70
How much TFA, acetate or chloride the powder contains. Other salt forms are quoted. Details
$150
Sterility for injectables: 1–10 unopened vials at the same sterility-test price. Bioburden for other forms. Included in Gold and Elite. Details
$200 per vial
Purity and routine identity by retention time and UV spectrum against a reference standard, without quantity: no mg per vial, concentration or label-claim result. 1 vial; 3 to 5 business days. LC-MS is quoted separately. Details
$360 per vial
Screen for semaglutide, tirzepatide and retatrutide without naming the expected peptide. Identity, amount and purity where reportable. Blind GLP-1 panel
Quoted
Which cysteines are paired, by Orbitrap high-resolution mass spectrometry of the digested peptide.
Quoted
Charge, polarity and size variants by ion-exchange, hydrophilic interaction and size-exclusion chromatography, alongside routine HPLC purity.
Quoted
Hydrolysis and amino acid analysis, to confirm composition and net peptide content.
Quoted
D- and L-forms of the amino acids, to check for racemization.
Orders of ten or more samples are 10% off.
ACTH fragment peptide
C136H210N40O31S
2933 g/mol
16960-16-0
Identity: Cosyntropin
Identity, purity and quantity are measured on the lab’s peptide method: reversed-phase HPLC on a C18 column with a water and acetonitrile gradient containing 0.1% TFA, UV detection at 214 to 220 nm, and LC-MS intact mass for identity, against a reference standard.
Testing to the USP Cosyntropin monograph is available and quoted for these tests: identity by HPLC retention time against a reference standard, LC-MS intact mass and amino acid analysis, purity and assay by HPLC with UV detection, and related compounds by HPLC.
Send 1 vial for Level 1 Silver, 3 vials for Level 2 Gold or 4 vials for Level 3 Elite; raw powder purity needs a 50 mg sample. Results arrive in 3 to 5 business days; sterility takes 14 days.
No. The $250 test covers identity, purity and quantity by HPLC and LC-MS against a reference standard. Testing to the USP Cosyntropin monograph covers the monograph tests listed on this page and is quoted.
Cosyntropin is the first 24 amino acids of ACTH (corticotropin), which is 39 amino acids long. The intact mass from LC-MS tells the fragment from the full hormone.
Yes. Its methionine can oxidize to the sulfoxide, which adds 16 Da and gives a separate HPLC peak. Samples should be kept cold and sealed.
https://pubchem.ncbi.nlm.nih.gov/compound/16129617
Identity facts from the USP monograph header for this compound.
Start an order online, or send the compound name and the tests you need for a quote.
