Aprepitant

Aprepitant: nK1 receptor antagonist.

Aprepitant testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.

Structure

Aprepitant: 2D structure drawn from the PubChem record (CID 135413536).

Compound data

CAS number

170729-80-3

Formula

C₂₃H₂₁F₇N₄O₃

Molecular weight

534.43 g/mol

Type

NK1 receptor antagonist

Structure and names

Identity: Aprepitant

IUPAC name: 3-[[(2R,3S)-2-[(1R)-1-[3,5-bis(trifluoromethyl)phenyl]ethoxy]-3-(4-fluorophenyl)morpholin-4-yl]methyl]-1,4-dihydro-1,2,4-triazol-5-one

How Vanguard tests Aprepitant

Method for the $250 identity, purity and quantity test: HPLC-UV purity and assay, LC-MS identity, against a reference standard, with results in 3 to 5 business days.

The USP monograph covers identity by infrared spectroscopy and HPLC retention time, assay by HPLC, organic impurities and the S,R,S-enantiomer by HPLC, and residue on ignition, water and optical rotation. Full testing to the USP Aprepitant monograph is available and quoted.

What's reported

Purity, as percent of total peak area
Quantity, against the label claim
Identity, reported as match or no match against the reference standard
With monograph testing (quoted): the monograph’s tests against its limits

Tests and prices

Purity and quantity

$250

Chromatographic purity and mg per unit by the method matched to the compound, identity against a reference standard. 1 unit.

Raw powder purity

$200

Chromatographic purity on bulk powder. 50 mg.

Add-on tests

Add-on test	Price
Identity and impurities
FTIR identity	$90
CHNS elemental analysis (carbon, hydrogen, nitrogen, sulfur)	$125
Chiral purity (where a chiral method exists; new methods quoted)	$250
Water, solvents and salt form
Water content by Karl Fischer	$60
Residual solvents	$150
Counterions: chloride, acetate and TFA	$70
Assay
Assay, % w/w (with raw powder purity; $250 together)	+$50
Metals and conformity
Heavy metals: arsenic, cadmium, chromium, mercury and lead	$150
Conformity: purity and quantity on more units from the same lot	$100 per extra unit
Microbiology (injectables)
Endotoxin	$210
Sterility or bioburden	$150
Container closure integrity (CCI)	$50
Screening
Fentanyl screen	$50

10% off for 10 or more samples.

Need something else? Other tests are available on request.

Sample amount and turnaround

Purity and quantity is $250 per sample (1 unit) and raw powder purity is $200 for 50 mg, with results in 3 to 5 business days. Send the material sealed and labeled, with the label claim and the form it contains.

Salts, forms and compendial references

Aprepitant (CAS 170729-80-3)
Tell us the salt or form the label states, so quantity is reported on the same basis.

Questions about Aprepitant testing

Is the $250 test the same as USP monograph testing?

No. The $250 test covers identity, purity and quantity by HPLC with UV detection for purity and assay, and LC-MS for identity. Full testing to the USP Aprepitant monograph is available and quoted.

Why does the monograph test for an enantiomer?

Aprepitant has three stereocenters, and its mirror-image form has the same mass and the same retention on standard columns. A chiral HPLC method is needed to measure it, which is quoted separately.

Can aprepitant be confused with fosaprepitant?

Fosaprepitant is a phosphorylated form of aprepitant and is much heavier. LC-MS tells them apart, and fosaprepitant can break down to aprepitant in solution.

Sources

https://pubchem.ncbi.nlm.nih.gov/compound/135413536

Identity facts from the USP monograph header for this compound.

Order

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