Balsalazide disodium: aminosalicylate prodrug (azo compound).
Balsalazide disodium testing at Vanguard Laboratory: identity, purity and quantity $250 per sample, with results in 3 to 5 business days.
Balsalazide disodium: 2D structure drawn from the PubChem record (CID 135414247).
150399-21-6
C17H13N3Na2O6 · 2H2O
437.32 g/mol
Aminosalicylate prodrug (azo compound)
Identity: Balsalazide disodium (dihydrate)
IUPAC name: disodium;3-[[4-[(3-carboxy-4-oxidophenyl)diazenyl]benzoyl]amino]propanoate;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 infrared and UV spectroscopy and a sodium test, assay by titration, organic impurities by HPLC and water content. Full testing to the USP Balsalazide Disodium 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 Balsalazide Disodium monograph is available and quoted.
Yes, that is the USP form. Sodium and water make up a sizable part of its weight, so whether the label states the salt or the free acid changes the quantity result.
It is an azo compound, and the azo link absorbs visible light. That strong absorbance also makes it easy to detect by HPLC.
Cleavage of the azo bond gives 5-aminosalicylic acid and 4-aminobenzoyl-beta-alanine, which appear as separate peaks in the HPLC profile.
https://pubchem.ncbi.nlm.nih.gov/compound/135414247
Identity facts from the USP monograph header for this compound.
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