Cholecalciferol EP Impurity E
Among the pharmacopoeial related substances of vitamin D3, Cholecalciferol EP Impurity E carries the impurity designation E of the cholecalciferol monograph. It is a C27H44O vitamin D related substance with a molecular weight of 384.64, presented as an off-white to light yellow oil, and it occurs in cholecalciferol material as a process and degradation related impurity. Analytical groups use it to establish specificity and resolution in HPLC or LC-MS methods, to confirm peak identification against a documented reference and to check system suitability before running a sample sequence. The material is kept at -80 C +/- 5 C and is shipped with dry ice, a reflection of the thermal sensitivity of the vitamin D skeleton. Pack sizes from 1 mg up to 1 g are listed. Enquiries about availability and supporting documentation can be submitted through the form on this page.
Also known as
Tachysterol 3; tachysterol3; (6E)-(3S)-9,10-seco-5(10),6,8-cholestatrien-3-ol; Cholecalciferol EP Impurity E; (3beta,6E)-9,10-Secocholesta-5(10),6,8-trien-3-ol; Tachysterol3 (80%); (3S,6E)-9,10-secocholesta-5(10),6,8-trien-3-ol; tacalciol. Further pharmacopoeial and trivial names are recorded on the certificate of analysis.
Pack sizes and lead time
| Pack size | Availability | Quote |
|---|---|---|
| 1 g | 10 days | |
| 1 mg | In stock | |
| 2 mg | In stock | |
| 5 mg | In stock | |
| 10 mg | 10 days | |
| 15 mg | 10 days | |
| 20 mg | 10 days | |
| 25 mg | 10 days | |
| 30 mg | 10 days | |
| 50 mg | In stock | |
| 100 mg | 10 days | |
| 150 mg | 10 days | |
| 200 mg | 10 days | |
| 250 mg | 10 days | |
| 500 mg | 10 days |
What the documents contain
- Certificate of analysis — issued per lot: catalogue and lot number, the value assigned to the material and the analytical basis for it.
- Safety data sheet — supplied for the catalogue item, and the basis for the transport classification used on the shipment.
- Storage and shipping conditions for this item: -80℃±5℃, Shipping with Dry Ice.
Frequently asked questions
Is a certificate of analysis (COA) available for Cholecalciferol EP Impurity E?
Yes. A batch-specific COA and the MSDS are issued for every lot of Cholecalciferol EP Impurity E (catalogue number C4X-15865). Use the COA link on this page, or email chao.lu@cato-chem.com with the lot number printed on your label and we will send the matching document.
What pack sizes and lead times are offered?
Pack sizes 1 mg, 2 mg, 5 mg, 50 mg are held in stock and typically ship within 1–2 working days Other sizes (1 g, 10 mg, 15 mg, 20 mg, 25 mg, 30 mg, 100 mg, 150 mg, 200 mg, 250 mg, 500 mg) are quoted with a lead time of approximately 10 days.
How is the purity of Cholecalciferol EP Impurity E documented?
Purity is determined per batch and stated on the COA together with the analytical data used for its assignment. If your method requires a specific grade or a particular pharmacopoeial naming, tell us the requirement when you enquire and we will confirm suitability.
Can you supply a larger quantity or a custom synthesis?
Yes. Quantities above the listed pack sizes are quoted on request, and custom synthesis or isolation from related starting materials can be discussed for compounds not held in stock. Contact chao.lu@cato-chem.com with the target quantity and required delivery date.
How is Cholecalciferol EP Impurity E shipped?
Shipping conditions for this item: Shipping with Dry Ice. Shipments are packed to maintain the specified storage condition, and the SDS is provided for transport classification.