Levothyroxine EP Impurity B CAS 1628720-66-0
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 1628720-66-0 |
| Molecular Formula | C15H11ClI3NO4 |
| Molecular Weight | 685.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Levothyroxine EP Impurity B (CAS 1628720-66-0) is a pharmacopoeial impurity standards certified reference material from CATO. Molecular formula: C15H11ClI3NO4. Molecular weight: 685.42 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C15H11ClI3NO4 |
| Molecular Weight | 685.42 g/mol |
| Purity | >95% |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | Cl/I-containing |
| Nitrogen Atoms | 1 |
Related Levothyroxine Standards
- Levothyroxine Impurity 25 (CAS CATO-C4X-167825)
- Levothyroxine Impurity 15 (CAS CATO-C4X-167815)
- Levothyroxine EP Impurity I (CAS 2016-06-0)
- Levothyroxine Impurity 44 (CAS 176258-89-2)
- Levothyroxine Impurity 41 (CAS 2055-94-9)
- Levothyroxine EP Impurity A (CAS 6893-02-3)
- Levothyroxine EP Impurity K (CAS 5817-39-0)
- Levothyroxine EP Impurity K (R-Isomer) (CAS 66701-15-3)
Recommended Standards
- Monochlorotriiodothyronine (CAS 909279-46-5)
- Upacicalcet Sodium Impurity 4 (CAS CATO-C4X-33924)
- N1,N1,N3,N3-Tetrakis(4-(tert-butyl)phenyl)-2-chloro-5-methylbenzene-1,3-diamine (CAS 2144770-82-9)
- Adenosine Impurity 20 (CAS 77530-02-0)
- Azelastine Impurity 17 (CAS 1239312-56-1)
- 3-(Aminomethyl)-3-(3,5-difluorophenyl)cyclobutan-1-ol (CAS 1487947-01-2)
- 1-[3-(4H-1,2,4-triazol-4-yl)phenyl]ethan-1-one (CAS 1515012-63-1)
- (5-Cyclopropoxy-2-ethylphenyl)(methyl)sulfane (CAS 1243468-90-7)
- 3,4-Diethyl-2-methyl-1H-pyrrole (CAS 34874-30-1)
- [Plus-β-Ala28]-Semaglutide (CAS CATO-C4X-2226221)
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