Big-flowered rhodiola: botanical (root and rhizome).
Big-flowered rhodiola testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.
Marker compound: 2D structure drawn from the PubChem record (CID 159278).
Rhodiola crenulata Root and Rhizome
salidroside, tyrosol
total or named markers, as your specification states
Botanical (root and rhizome)
Marker compounds: salidroside (CAS 10338-51-9), tyrosol (CAS 501-94-0)
Method for the $250 identity, purity and quantity test: HPLC-UV marker-compound assay (salidroside and tyrosol), LC-MS identity, against a reference standard, with results in 3 to 5 business days.
The USP Herbal Medicines Compendium monograph covers identity by HPTLC fingerprint and content of salidroside and tyrosol by HPLC. Full testing to the USP Herbal Medicines Compendium monograph for Rhodiola crenulata Root and Rhizome is available and quoted.
$250
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 |
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 measurement of salidroside and tyrosol, with LC-MS identity. Full testing to the USP Herbal Medicines Compendium monograph for Rhodiola crenulata Root and Rhizome is available and quoted.
Both contain salidroside and tyrosol, but Rhodiola rosea also contains rosavins, which R. crenulata lacks or has at very low levels. Rosavin testing helps show which species a product contains.
Salidroside is also made by synthesis or fermentation and is sometimes added to extracts. A very high salidroside level with little tyrosol or other phenolics can point to added material.
https://pubchem.ncbi.nlm.nih.gov/compound/159278
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.
