Skip to content
Technical & commercial enquiries: sales@rssechem.com Certificate of analysis issued per lot · Worldwide shipping
Register Request a quote & Contact us

Isoleucine Impurity 21

  • CAS5937-83-7
  • CatalogueRS-I121018
  • FormulaC5H11NO2
  • MW117.15
IN STOCK
On this page
Chemical structure of Isoleucine Impurity 21

Product identification

Product nameIsoleucine Impurity 21
Catalogue No.RS-I121018
CAS No.5937-83-7
Molecular formulaC5H11NO2
Molecular weight117.15
AvailabilityIn stock— dispatched in about 1–2 weeks
Standard typeImpurity Reference Standards
Drug substanceIsoleucine
StorageRefer to the certificate of analysis (COA) supplied with each lot
Intended useFor laboratory and research use only. Not for human or veterinary use.

What is stated on the certificate

Content and purity are assigned per lot and stated on the certificate of analysis issued for the batch you receive — they are not a catalogue-level figure. The certificate records the tests performed, the specification applied and the result obtained for that lot.

Fields recorded on the certificate of analysis
FieldBasis
IdentitySpectroscopic and chromatographic methods appropriate to the material
PurityChromatographic purity, area normalisation unless stated otherwise
Assay / contentMass balance, corrected for the stated volatiles and residue
Catalogue and batch numbersRS-I121018 / batch number on the certificate
Retest datePrinted on the certificate for the lot supplied

Frequently asked

What documentation is supplied with this lot?
A certificate of analysis (COA) is issued for the lot you receive. It records the catalogue number RS-I121018 and the batch number, the tests performed, the specification applied and the result obtained. A safety data sheet is supplied with the shipment.
Is the assigned value given on an “as is” basis?
Content and purity are stated per lot on the certificate of analysis, on an “as is” basis unless the certificate says otherwise. The analytical basis for the assigned value is stated on the certificate.
How should this material be stored?
Store as stated: Refer to the certificate of analysis (COA) supplied with each lot. Re-test before use beyond the retest date printed on the certificate.
Do you supply pack sizes other than those listed?
Pack sizes are confirmed with the quotation. Quantities beyond the standard pack sizes can be quoted — send the quantity you need with your enquiry.

Finding this standard

Buyers reach this compound by CAS number, by catalogue number, through the drug substance it belongs to, or through the type of standard it is. Those routes all start here:

Searching another way? Send the structure, a SMILES string or the pharmacopoeial name — a CAS number is not required for a non-compendial impurity. Write to sales@rssechem.com.

Other standards of Isoleucine

All 35 further standards are listed here — every link is in the page, not loaded later.

Pharmacopoeial names (EP, USP, BP, JP) are used for identification purposes only and do not imply endorsement by those bodies. This product is supplied for laboratory and research use only — not for human or veterinary use.