Active ingredientClenbuterol HydrochlorideCat. No. P-C188-001CAS 21898-19-1
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Pharmacopoeial impurity · Clenbuterol family
Pharmaceutical analytical standardClenbuterol EP Impurity B Hydrochloride
Synonyms: Clenbuterol Impurity B, Clenbuterol EP impurity B HCI, Clenbuterol EP Impurity B HCl
- Cat. No.
- P-C188-003
- CAS
- 37148-49-5
- Alternative CAS
- 69708-36-7 (free base)
- 37845-71-9 (alternative CAS, same compound)
- Formula
- C12H16Cl2N2O·HCl
- Molecular weight
- 311.63 g/mol
- Category
- Pharmacopoeial impurity (EP/USP)
Family: Clenbuterol
A long-acting beta-2 adrenergic agonist bronchodilator, patented in 1967 and in medical use since 1977; in some countries it is approved for asthma, and in veterinary medicine it is used in horses with allergic respiratory disease.
Did you know?It also relaxes the muscle of the uterus: in cows it is given intravenously at calving, for example to make a caesarean section easier.
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 Clenbuterol family
Active ingredientClenbuterol HydrochlorideCat. No. P-C188-001CAS 21898-19-1
Pharmacopoeial impurityClenbuterol EP Impurity ACat. No. P-C188-002CAS 62909-66-4
Pharmacopoeial impurityClenbuterol EP Impurity CCat. No. P-C188-005CAS 37148-48-4
Pharmacopoeial impurityClenbuterol EP Impurity DCat. No. P-C188-006CAS 99-92-3
Pharmacopoeial impurityClenbuterol EP Impurity ECat. No. P-C188-007CAS 37148-47-3
Pharmacopoeial impurityClenbuterol EP Impurity FCat. No. P-C188-008CAS 37153-52-9
Isotopically labelledClenbuterol-d9Cat. No. P-C188-009CAS 129138-58-5
Isotopically labelledN-Nitroso Clenbuterol-d9Cat. No. P-C188-010Frequently 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.