Famotidine

Famotidine: h2 receptor antagonist.

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

Structure

Famotidine: 2D structure drawn from the PubChem record (CID 5702160).

Compound data

CAS number

76824-35-6

Formula

C₈H₁₅N₇O₂S₃

Molecular weight

337.45 g/mol

Type

H2 receptor antagonist

Structure and names

Identity: Famotidine

IUPAC name: 3-[[2-(diaminomethylideneamino)-1,3-thiazol-4-yl]methylsulfanyl]-N’-sulfamoylpropanimidamide

How Vanguard tests Famotidine

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, assay by nonaqueous titration, organic impurities by HPLC, plus residue on ignition and loss on drying. Full testing to the USP Famotidine 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

Famotidine (CAS 76824-35-6)
Tell us the salt or form the label states, so quantity is reported on the same basis.

Questions about Famotidine testing

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

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

The monograph assays famotidine by titration. Why does the $250 test use HPLC?

Titration measures total basic content and cannot tell famotidine from basic impurities. HPLC separates famotidine from its related compounds, so it gives purity and quantity in one run.

Can famotidine tablets that also contain antacids be tested?

Yes. Products that combine famotidine with calcium carbonate and magnesium hydroxide are extracted so the famotidine can be measured by HPLC without interference from the antacids.

Sources

https://pubchem.ncbi.nlm.nih.gov/compound/5702160

Identity facts from the USP monograph header for this compound.

Order

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