Impurity3,3'-DihydroxyazoxybenzeneCat. No. P-A128-002CAS 17540-51-1
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Impurity or related compound · Aminosalicylic Acid family
Pharmaceutical analytical standardIsopropyl Aminosalicylate
Synonyms: 1-Methylethyl 4-amino-2-hydroxybenzoate, propan-2-yl 4-amino-2-hydroxybenzoate, Benzoic acid, 4-amino-2-hydroxy-, 1-methylethyl ester, Isopropyl p-aminosalicylate, Salicylic acid, amino-, isopropyl ester, Isopropyl 4-amino-2-hydroxy-benzoate, Isopropyl 4-Amino-2-hydroxybenzoate (Isopropyl Aminosalicylate)
- Cat. No.
- P-A128-004
- CAS
- 6018-21-9
- Alternative CAS
- N/A
- Formula
- C10H13NO3
- Molecular weight
- 195.22 g/mol
- Category
- Impurity or related compound
Family: Aminosalicylic Acid
4-Aminosalicylic acid (PAS), an anti-tuberculosis drug discovered in Sweden by chemist Jörgen Lehmann, who first tried it late in 1944: it was the second effective drug against tuberculosis after streptomycin and is now used for resistant forms.
Did you know?It had already been synthesised in 1902: Lehmann rediscovered it after reading that the tuberculosis bacillus avidly metabolised salicylic acid, and thought of a similar molecule to block it.
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 Aminosalicylic Acid family
Impurity3,3'-DihydroxyazoxybenzeneCat. No. P-A128-002CAS 17540-51-1
ImpurityEthyl AminosalicylateCat. No. P-A128-003CAS 6059-17-2
ImpurityN-Formyl-5-aminosalicylic AcidCat. No. P-A128-005
ImpuritySodium Aminosalicylate DihydrateCat. No. P-A128-006CAS 6018-19-5Frequently 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.