Conjugated Estrogens EP Impurity D CAS 4999-79-5
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 4999-79-5 |
| Molecular Formula | C18H23O5S Na |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Conjugated Estrogens EP Impurity D (CAS 4999-79-5) is a pharmacopoeial impurity standards certified reference material from CATO. Molecular formula: C18H23O5S Na. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C18H23O5S Na |
| Molecular Weight | 374.43 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, 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) | 7.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Sulfur Atoms | 1 |
Related Conjugated Standards
- Conjugated Linoleic Acid Methyl Ester (CAS 1002-79-5)
- Conjugated octadecadienoic acid (CAS 121250-47-3)
- Conjugated Linoleic Acid Ethyl Ester, 90% (Mixture of Isomers) (CAS 137142-61-1)
- Conjugated Estrogens EP Impurity H (CAS 16680-48-1)
- Conjugated Estrogens EP Impurity C (CAS 16680-49-2)
- Conjugated Estrogens EP Impurity F (CAS 16680-50-5)
- Conjugated Estrogens EP Impurity J (CAS 474-86-2)
- Conjugated Estrogens EP Impurity A (CAS 56050-04-5)
Recommended Standards
- Alectinib impurity 19 (CAS 1578259-67-2)
- Argatroban Impurity 79 (CAS 121785-72-6)
- Ethyl 4-phenoxybutanoate (CAS 2364-59-2)
- 1-(3-Carboxypropyl)-5-oxopyrrolidine-3-carboxylic acid (CAS 51316-26-8)
- (3-Chloro-5-fluorophenyl)(4-chlorophenyl)methanol (CAS 844683-35-8)
- 1-((3A'R,4'R,6'R,6a'S)-6'-(fluoromethyl)-6'-(hydroxymethyl)-3a'-methyltetrahydrospiro[cyclopentane-1,2'-furo[3,4-d][1,3]dioxol]-4'-yl)pyrimidine-2,4(1H,3H)-dione (CAS 1643585-09-4)
- Semaglutide impurity 275 (CAS CATO-C4X-2226275)
Why CATO?
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