Pharmacopoeial impurityPhenylbutyrate EP Impurity BCat. No. P-P092-003CAS 529-34-0
Drag to rotate
Pharmacopoeial impurity · Phenylbutyrate family
Pharmaceutical analytical standardPhenylbutyrate EP Impurity A
Synonyms: 3-Benzoylpropionic acid, 4-oxo-4-phenylbutanoic acid, beta-Benzoylpropionic acid, Benzoylpropionic acid, Benzenebutanoic acid, gamma-oxo-, Propionic acid, 3-benzoyl-, NSC 2092, NSC 51010, NSC 229040, Propanoic acid, 3-benzoyl-, Succinylbenzene, Gamma-oxo-benzenebutanoicaci, Cambridge id 5118846
- Cat. No.
- P-P092-002
- CAS
- 2051-95-8
- Alternative CAS
- N/A
- Formula
- C10H10O3
- Molecular weight
- 178.19 g/mol
- Category
- Pharmacopoeial impurity (EP/USP)
Family: Phenylbutyrate
An aromatic fatty acid, used as its sodium salt and approved in the United States in 1996 for urea cycle disorders: in the body it becomes phenylacetate, which binds the nitrogen of glutamine and has it excreted in the urine instead of urea.
Did you know?The alternative nitrogen disposal pathway was discovered in the early 1980s at Johns Hopkins by Saul Brusilow and Mark Batshaw: phenylbutyrate replaced phenylacetate because, unlike it, it lacks an unpleasant smell.
The two levels compared
| Level 1 Mass balance | Level 2 Mass balance + qNMR | |
|---|---|---|
| Identity (IR, MS, 1H and 13C-NMR; peptides: ESI-MS, MALDI-TOF and IR) | ✓ | ✓ |
| HPLC purity (min. 95%) | ✓ | ✓ |
| Content by mass balance (min. 90%; peptides: for information only)* | ✓ | ✓ |
| Content verified by qNMR (small molecules only) | · | ✓ |
| Suitable to qualify it as an in-house primary standard (ICH Q7) | · | ✓ |
* Mass balance is performed on every molecule. The only exceptions are cases where the chemistry of the molecule prevents it, for example oils and highly volatile substances, on which some of the required measurements cannot be made: in those cases the CoA states how the content was assigned.
What you receive
The analytical standard
Shipped under controlled temperature when the molecule requires it.
Certificate of analysis (CoA)
For every lot: identity, purity and assay, with the supporting spectra and chromatograms.
Safety data sheet (SDS)
Sent with every order.
Tracked shipment
Follow your shipment live, from our warehouse to your lab.
More products in the Phenylbutyrate family
Pharmacopoeial impurityPhenylbutyrate EP Impurity BCat. No. P-P092-003CAS 529-34-0
Pharmacopoeial impurityPhenylbutyrate EP Impurity CCat. No. P-P092-004CAS 4441-63-8
Isotopically labelledPhenylbutyrate-d11 Sodium SaltCat. No. P-P092-005CAS 1392208-11-5
ImpuritySodium PhenylbutyrateCat. No. P-P092-006CAS 1716-12-7Frequently asked questions
Is mass balance always performed?
Yes, on every molecule. The only exceptions are cases where the chemistry of the molecule prevents it: for example oils and highly volatile substances, on which some measurements (such as thermogravimetry) cannot be made. In those cases the CoA states which method was used to assign the content.
Can I ask for a different quantity?
Yes. The quantities are only suggestions: choose "Other" and enter the milligrams or grams you need.
Which level should I choose?
Level 1 is enough for most routine testing. Level 2 adds an independent qNMR content value and is meant for labs that need to qualify an in-house primary standard. For peptides and similar molecules, Level 2 is not available.
When will I get the quote?
Within 24 working hours, with price, availability and delivery time.
Need a molecule you cannot find?
Custom synthesis of impurities, metabolites and labelled compounds, with the same characterisation level.