Active ingredientOxaprozinCat. No. P-O050-001CAS 21256-18-8
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Stable isotope labelled · Oxaprozin family
Pharmaceutical analytical standardOxaprozin-d5
- Cat. No.
- P-O050-003
- CAS
- 2933758-40-6
- Alternative CAS
- 21256-18-8 (unlabelled form)
- 174064-08-5 (unlabelled form, potassium salt)
- Formula
- C18H10D5NO3
- Molecular weight
- 298.35 g/mol
- Category
- Stable isotope labelled
Family: Oxaprozin
A non-steroidal anti-inflammatory drug derived from propionic acid, patented in 1967 and approved for medical use in the 1980s (in the United States in 1992): it relieves pain, swelling and stiffness in osteoarthritis and rheumatoid arthritis.
Did you know?Its half-life is about 55 hours, more than two days, and in the blood 99% of it is bound to plasma proteins.
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 Oxaprozin family
Active ingredientOxaprozinCat. No. P-O050-001CAS 21256-18-8
MetaboliteOxaprozin Acyl GlucuronideCat. No. P-O050-002CAS 90283-09-3
ImpurityOxaprozin Impurity 1Cat. No. P-O050-004CAS 55217-15-7
Impurity3-(4,5-diphenyloxazol-2-yl)propanamideCat. No. P-O050-005CAS 24248-49-5
ImpurityOxaprozin Impurity 2Cat. No. P-O050-006CAS 55217-14-6Frequently 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.