Cefaclor EP Impurity G-Isomer 1
CAS 67308-21-8
Cat. no. C4X-12707 Formula C16H17N3O4S
MW 347.39
In stock
Cefaclor EP Impurity G-Isomer 1 is a stereochemical variant associated with the pharmacopoeial Impurity G of cefaclor, the oral second-generation cephalosporin antibiotic. It is characterised by the formula C16H17N3O4S and a molecular weight of 347.39, while the isomer designation itself indicates that closely related forms exist and must be separated from one another. Laboratories use this standard during method development and validation to establish selectivity and resolution between closely eluting species, for identification and confirmation of impurity peaks, for system suitability testing, and for quantitative calibration of impurity levels in drug substance and finished product. It is a white to pale beige solid, stored at -20 °C (±5 °C) and shipped with ice packs. Available pack sizes range from 10 mg to 200 mg, including 15 mg, 20 mg, 22 mg, 25 mg, 30 mg, 40 mg, 50 mg, 60 mg, 75 mg, 100 mg and 135 mg. Quotations and documentation can be requested.
Also known as
Cefaclor Impurity G-Isomer 1. Further pharmacopoeial and trivial names are recorded on the certificate of analysis.
Pack sizes and lead time
| Pack size | Availability | Quote |
|---|---|---|
| 10 mg | In stock | |
| 15 mg | In stock | |
| 20 mg | 35 days | |
| 22 mg | 35 days | |
| 25 mg | 35 days | |
| 30 mg | 35 days | |
| 40 mg | 35 days | |
| 50 mg | 35 days | |
| 60 mg | 35 days | |
| 75 mg | 35 days | |
| 100 mg | 35 days | |
| 135 mg | 35 days | |
| 200 mg | 35 days |
Content and purity for each pack size are stated per lot on the certificate of
analysis. Prices are quoted per enquiry so that pack size, documentation and shipping requirements
can be confirmed together — no price is published on this site.
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: -20℃±5℃, Shipping with Ice Packs.
Frequently asked questions
Is a certificate of analysis (COA) available for Cefaclor EP Impurity G-Isomer 1?
Yes. A batch-specific COA and the MSDS are issued for every lot of Cefaclor EP Impurity G-Isomer 1 (catalogue number C4X-12707). Use the COA link on this page, or email [email protected] 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 10 mg, 15 mg are held in stock and typically ship within 1–2 working days Other sizes (20 mg, 22 mg, 25 mg, 30 mg, 40 mg, 50 mg, 60 mg, 75 mg, 100 mg, 135 mg, 200 mg) are quoted with a lead time of approximately 35 days.
How is the purity of Cefaclor EP Impurity G-Isomer 1 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 [email protected] with the target quantity and required delivery date.
How is Cefaclor EP Impurity G-Isomer 1 shipped?
Shipping conditions for this item: Shipping with Ice Packs. Shipments are packed to maintain the specified storage condition, and the SDS is provided for transport classification.
Related products