Benzoyl peroxide: organic peroxide (diacyl peroxide).
Benzoyl peroxide testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.
Benzoyl peroxide: 2D structure drawn from the PubChem record (CID 7187).
94-36-0
C14H10O4
242.23 g/mol
Organic peroxide (diacyl peroxide)
Identity: Benzoyl peroxide (anhydrous)
IUPAC name: benzoyl benzenecarboperoxoate
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 TLC and HPLC retention time, assay by iodometric titration and organic impurities by HPLC. Full testing to the USP Hydrous Benzoyl Peroxide 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 with UV detection for purity and assay, and LC-MS for identity. Full testing to the USP Hydrous Benzoyl Peroxide monograph is available and quoted.
Dry benzoyl peroxide is flammable and shock sensitive, so the USP article contains added water to make it safer to handle. Results are usually reported on the anhydrous basis so lots with different water content can be compared.
It breaks down to benzoic acid, especially with heat or in some gel bases. A rising benzoic acid peak and falling assay are the usual signs of an aged product.
As hydrous powder or in gels, washes and creams. Finished products should be sent cool and sealed.
https://pubchem.ncbi.nlm.nih.gov/compound/7187
Identity facts from the USP monograph header for this compound.
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