Quinine sulfate: cinchona alkaloid.
Quinine sulfate testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.
Quinine sulfate: 2D structure drawn from the PubChem record (CID 16211610).
207671-44-1
(C20H24N2O2)2 · H2SO4 · 2H2O
782.94 g/mol
Cinchona alkaloid
Identity: Quinine sulfate (dihydrate)
IUPAC name: bis((R)-[(2S,4S,5R)-5-ethenyl-1-azabicyclo[2.2.2]octan-2-yl]-(6-methoxyquinolin-4-yl)methanol);sulfuric acid;dihydrate
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 fluorescence, thin-layer chromatography and a sulfate test, assay by titration, organic impurities by thin-layer chromatography, dihydroquinine by HPLC, a chloroform-alcohol insoluble substances test, residue on ignition, optical rotation, and water content. Full testing to the USP Quinine Sulfate monograph is available and quoted.
Chromatographic purity and mg per unit by the method matched to the compound, identity against a reference standard. 1 unit.
| 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.
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.
No. The $250 test covers identity, purity and quantity by HPLC-UV for purity and quantity and LC-MS for identity. Full testing to the USP Quinine Sulfate monograph is available and quoted.
Dihydroquinine is a natural cinchona alkaloid that comes along with quinine and is present at low levels in most quinine. It is two mass units heavier and separates by HPLC, which is how it is measured.
Quinine and quinidine are diastereomers with the same mass. They separate by HPLC retention time, so the test shows whether quinidine is present.
Yes. Quinine in beverages is measured by HPLC after degassing and dilution, and its strong fluorescence can add sensitivity at low levels.
https://pubchem.ncbi.nlm.nih.gov/compound/16211610
Identity facts from the USP monograph header for this compound.
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