Levonorgestrel

Levonorgestrel: progestin (19-nortestosterone derivative).

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

Structure

Levonorgestrel: 2D structure drawn from the PubChem record (CID 13109).

Compound data

CAS number

797-63-7

Formula

C₂₁H₂₈O₂

Molecular weight

312.45 g/mol

Type

Progestin (19-nortestosterone derivative)

Structure and names

Identity: Levonorgestrel

IUPAC name: (8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one

How Vanguard tests Levonorgestrel

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, melting range and specific rotation, ethynyl group content by titration, chromatographic purity, loss on drying, residue on ignition, and an assay that follows the chromatographic procedure of the Norgestrel monograph. Full testing to the USP Levonorgestrel 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

Levonorgestrel (CAS 797-63-7)
Tell us the salt or form the label states, so quantity is reported on the same basis.

Questions about Levonorgestrel 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 Levonorgestrel monograph is available and quoted.

What is the difference between levonorgestrel and norgestrel?

Norgestrel is a mix of two mirror-image forms, and levonorgestrel is the single active enantiomer. They have the same mass, so standard HPLC and LC-MS confirm the molecule but do not tell the two apart.

How would you confirm it is the levo form?

The USP monograph uses specific rotation for that. Optical rotation or a chiral HPLC method can be added to the quote if the enantiomer matters for your sample.

Sources

https://pubchem.ncbi.nlm.nih.gov/compound/13109

Identity facts from the USP monograph header for this compound.

Order

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