Active ingredientMalathionCat. No. P-M003-001CAS 121-75-5
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Pharmacopoeial impurity · Malathion family
Pharmaceutical analytical standardMalaoxon
Synonyms: Malathion EP Impurity B, diethyl 2-dimethoxyphosphorylsulfanylbutanedioate, Liromat, Oxycarbophos, Maloxon, Carbethoxy malaoxon, Malathion oxon, O,O-Dimethyl S-1,2-bis(ethoxycarbonyl)ethyl phosphorothioate, dl-malaoxon, O,O-Dimethyl-S-(1,2-dicarbethoxy)ethyl phosphorothioate, S-(1,2-Diethoxycarbonyl)ethyl O,O-dimethyl phosphorothioate, Butanedioic acid, ((dimethoxyphosphinyl)thio)-, diethyl ester, Diethyl ((dimethoxyphosphino)thio)butanedioate, Diethyl((dimethoxyphosphinyl)thio)butanedioate, Malaoxan, Butanedioic acid, 2-((dimethoxyphosphinyl)thio)-, 1,4-diethyl ester
- Cat. No.
- P-M003-002
- CAS
- 1634-78-2
- Alternative CAS
- N/A
- Formula
- C10H19O7PS
- Molecular weight
- 314.29 g/mol
- Category
- Pharmacopoeial impurity (EP/USP)
Family: Malathion
An organophosphate insecticide that blocks the enzyme acetylcholinesterase in insects, first registered in the United States in 1956: it is used in agriculture, in mosquito and fruit fly control programmes and, at low concentrations, in lotions against head lice.
Did you know?Mammals and birds have more carboxylesterase than insects: they break malathion down before it can turn into malaoxon, its active form, which explains its low toxicity to them.
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.
- Malathion impurity B CRSEP M0120010
More products in the Malathion family
Active ingredientMalathionCat. No. P-M003-001CAS 121-75-5
ImpurityIsomalathionCat. No. P-M003-003CAS 3344-12-5Frequently 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.