Tocopherol Impurity 25 CAS 69371-91-1
| CAS No. | 69371-91-1 |
| Molecular Formula | C29H52O2 |
| Molecular Weight | 432.72 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, a hydroxyl group, an ether linkage, Tocopherol Impurity 25 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 432.72 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Tocopherol Impurity 25 (CAS 69371-91-1), a pharmacopoeial impurity reference standard (molecular formula C29H52O2, MW 432.72 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
As a certified reference material (CRM), Tocopherol Impurity 25 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C29H52O2 |
| Molecular Weight | 432.72 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1976 |
Related Tocopherol Standards
- Tocopherol Impurity 32 (CAS CATO-C4X-119532)
- (2S)-α-Tocopherol (Mixture of Diastereomers) (CAS 1411583-24-8)
- (2R)-α-Tocopherol (Mixture of Diastereomers) (CAS 895518-38-4)
- Tocopherol Impurity 23 (Deshydroxy Tocopherol Quinone) (CAS 75917-94-1)
- Tocopherol impurity 37 (CAS 185672-33-7)
- DL-Tocopherol (CAS 2074-53-5)
- Tocopherol Impurity 4 (CAS 3808-26-2)
- δ-Tocopherol Acetate (CAS 13027-26-4)
Recommended Standards
- 3-(4-Bromobenzenesulfonyl)-N-(4-chlorophenyl)-2-hydroxy-2-methylpropanamide (CAS 338423-93-1)
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- 1189685-87-7 N,N'-Di-(n-octyl-d17)-3,3'-dithiodipropionamide N-(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecadeuteriooctyl)-3-[[3-(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecadeuteriooctylamino)-3-oxopropyl]disulfanyl]propanamide (CAS 1189685-87-7)
- 13569-75-0 Chromium iodide (CrI3) Chromium triiodide Chromium iodide EINECS 236-991-3 (CAS 13569-75-0)
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- 1-(Naphthalene-2-sulfonyl)piperidine-4-carboxylic acid (CAS 147959-02-2)
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- Tirzepatide Impurity 18 (CAS CATO-C4X-324018)
Why CATO?
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