Active ingredientClomifene CitrateCat. No. P-C210-001CAS 50-41-9
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Pharmacopoeial impurity · Clomifene family
Pharmaceutical analytical standardClomiphene EP Impurity C HCl
Synonyms: Deschloro-1,2-dihydro-2-oxo Clomiphene Hydrochloride Salt, Clomifene Ci, Deschloro-1,2-dihydro-2-oxo clomiphene HCl
- Cat. No.
- P-C210-005
- CAS
- 5635-70-1
- Alternative CAS
- 5530-99-4 (free base)
- Formula
- C26H29NO2·HCl
- Molecular weight
- 423.98 g/mol
- Category
- Pharmacopoeial impurity (EP/USP)
Family: Clomifene
A selective oestrogen receptor modulator synthesised in 1956 by chemist Frank Palopoli and first marketed in 1967: it is used to stimulate ovulation in fertility treatment.
Did you know?Ironically, one of the first uses considered was as a contraceptive: instead, a 1961 study showed that it restored ovulation in 28 out of 36 women.
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 Clomifene family
Active ingredientClomifene CitrateCat. No. P-C210-001CAS 50-41-9
Pharmacopoeial impurityClomifene Citrate EP Impurity A HClCat. No. P-C210-002CAS 74056-26-1
Pharmacopoeial impurityClomifene Citrate EP Impurity BCat. No. P-C210-003CAS 796-77-0
Pharmacopoeial impurityClomifene Citrate EP Impurity A CitrateCat. No. P-C210-004CAS 19957-53-0
Pharmacopoeial impurityClomiphene EP Impurity E CitrateCat. No. P-C210-006CAS 117884-83-0
Pharmacopoeial impurityClomiphene EP Impurity F Citrate SaltCat. No. P-C210-007CAS 14158-75-9
Isotopically labelledcis-Clomifene-d5 HClCat. No. P-C210-008
Isotopically labelledClomifene-d4Cat. No. P-C210-009Frequently 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.