Pharmacopoeial impurity(R)-Etomidate EP Impurity CCat. No. P-E136-002CAS 771422-77-6
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Active ingredient · Etomidate family
Pharmaceutical analytical standardEtomidate
Synonyms: ethyl 3-[(1R)-1-phenylethyl]imidazole-4-carboxylate, Hypnomidate, Amidate, R-(+)-Ethyl 1-(1-phenylethyl)-1H-imidazole-5-carboxylate, NSC 759160, Ethomidate, Imidazole-5-carboxylic acid, 1-(alpha-methylbenzyl)-, ethyl ester, (R)-(+)-, Radenarcon, Amidate (pharmaceutical), Ethyl (R)-1-(1-phenylethyl)-1H-imidazole-5-carboxylate
- Cat. No.
- P-E136-001
- CAS
- 33125-97-2
- Alternative CAS
- 51919-80-3 (sulfate)
- 53188-20-8 (hydrochloride)
- Formula
- C14H16N2O2
- Molecular weight
- 244.29 g/mol
- Category
- Active ingredient (API)
An intravenous hypnotic used to induce general anaesthesia, developed in 1964 and introduced in Europe in 1972: it is valued because it causes only a small drop in blood pressure.
Did you know?The molecule exists in two mirror-image forms, but only the R form is used clinically: it is about ten times more potent than the other.
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.
Pharmacopoeial standards available
The official European Pharmacopoeia standards for this molecule, supplied with EDQM documentation.
- Etomidate CRSEP E2503000
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Impurity2-[(1S)-1-hydroxyethyl]phenolCat. No. P-E136-011CAS 195257-74-0Frequently 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.