Tacrolimus impurity 68 CAS 1262804-11-4
| CAS No. | 1262804-11-4 |
| Molecular Formula | C45H71NO12 |
| Molecular Weight | 818.04 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
CATO supplies Tacrolimus impurity 68 (CAS 1262804-11-4), a pharmacopoeial impurity reference standard (molecular formula C45H71NO12, MW 818.04 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C45H71NO12, Tacrolimus impurity 68 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 818.04 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
Physical & Chemical Properties
| Molecular Formula | C45H71NO12 |
| Molecular Weight | 818.04 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 1 |
Related Tacrolimus Standards
- Tacrolimus Methyl Ether (CAS 124554-16-1)
- Tacrolimus Impurity 39 (CAS CATO-C4X-130039)
- Tacrolimus impurity 62 (CAS CATO-C4X-130062)
- Tacrolimus impurity 66 (CAS CATO-C4X-130066)
- Tacrolimus Hydroxy Acid Impurity (CAS 1700657-83-5)
- Tacrolimus 21-Carboxy Acid (CAS CATO-C4X-130029)
- Tacrolimus impurity 65 (CAS CATO-C4X-130065)
- Tacrolimus impurity 69 (CAS CATO-C4X-130069)
Recommended Standards
- Semaglutide impurity 64 (CAS CATO-C4X-222664)
- Semaglutide impurity 66 (CAS CATO-C4X-222666)
- Anamorelin Impurity 10 (CAS CATO-C4X-286910)
- Aerothionin (CAS 28714-26-3)
- Cilnidipine impurity 20 (CAS CATO-C4X-179620)
- Janagliflozin impurity 1 (CAS CATO-C4X-30321)
- Dotinurad Impurity 180 (CAS CATO-C4X-2494180)
- 2,2-Difluoro-2-(5-methylpyridin-2-yl)ethan-1-ol (CAS 780769-39-3)
- Ethyl 2-methyl-2-(1H-pyrazol-3-yl)propanoate (CAS 2107504-57-2)
- Posaconazole Impurity 270 (CAS 55743-71-0)
- (2R,3R,4R,5R)-4-(((2S,3R,4S,5S,6R)-3,5-Dihydroxy-6-(hydroxymethyl)-4-(((2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)tetrahydro-2H-pyran-2-yl)oxy)-2,3,5,6-tetrahydroxyhexanal (CAS 41744-59-6)
- 2-(Difluoromethyl)-5-hydroxy-3-methoxypyridine-6-methanol (CAS 1807110-88-8)
- 3-Pyridinecarbothioic acid (CAS 51087-03-7)
- Glucagon-like peptide 2 (CAS 89750-15-2)
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