trans-Resveratrol

trans-Resveratrol: stilbene.

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

Structure

trans-Resveratrol: 2D structure drawn from the PubChem record (CID 445154).

Compound data

CAS number

501-36-0

Formula

C₁₄H₁₂O₃

Molecular weight

228.24 g/mol (monoisotopic 228.08)

Type

stilbene

Structure and names

IUPAC name: 5-[(E)-2-(4-hydroxyphenyl)ethenyl]benzene-1,3-diol

Other names: resveratrol

How Vanguard tests trans-Resveratrol

Identity, purity and quantity are measured by reversed-phase HPLC with UV detection against a reference standard, $250 per sample with results in 3 to 5 business days. Finished products use the same approach, with sample preparation matched to the product.

A USP monograph exists for Resveratrol; testing to the USP Resveratrol monograph is available and quoted.

What's reported

Purity, as percent of total peak area
Quantity, in mg per serving or % w/w against the label
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

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

A USP monograph exists for Resveratrol. Monograph testing is quoted.
Tell us the salt or form the label states, so quantity is reported on the same basis.
One page covers trans-Resveratrol and its salts and forms.

Questions about trans-Resveratrol testing

Can you tell trans-resveratrol from cis-resveratrol?

Yes. trans-Resveratrol converts to cis in light, and HPLC separates the two. Send samples protected from light.

Can you test it in a finished product?

Yes. Capsules, powders, gummies and liquids are measured with sample preparation matched to the product, and reported in mg per serving or % w/w against the label.

Sources

https://pubchem.ncbi.nlm.nih.gov/compound/445154

Order

Send the product name, the form of the ingredient and the label claim for a quote, or submit a sample with the sample form.

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