Description

Staphylomycin S1-Libr Compound (1:1) is a defined mixture of two synergistic antibiotic components, Virginiamycin S1 and Virginiamycin M1, commonly known as Virginiamycin. This compound is valued for its potent activity against Gram-positive bacteria, particularly in inhibiting protein synthesis. It is primarily utilized in the animal health and feed additive sectors, where it serves as a growth promoter and therapeutic agent. The product is supplied as a high-purity material suitable for formulation and research applications.

Application

• Veterinary Medicine: Used as an active pharmaceutical ingredient (API) in formulations for the prevention and treatment of bacterial infections in livestock, such as swine and poultry.
• Animal Feed Additive: Incorporated into feed to promote growth, improve feed efficiency, and maintain animal health by controlling pathogenic bacteria in the gut.
• Microbiological Research: Serves as a critical tool in laboratory studies for investigating bacterial protein synthesis, antibiotic resistance mechanisms, and synergistic antibiotic action.
• Pharmaceutical Intermediates: Used in the synthesis and development of more complex antibiotic formulations or derivative compounds.
• Quality Control Standards: Employed as a reference standard in analytical laboratories for the identification and assay of Virginiamycin in commercial products.

Basic Information

Product Name	Staphylomycin S1-Libr Compound (1:1)
CAS No.	11098-77-4
Molecular Formula	C53H67N9O17 (Virginiamycin S1) + C28H35N3O7 (Virginiamycin M1)
Molecular Weight	1102.2 g/mol (Virginiamycin S1) + 525.6 g/mol (Virginiamycin M1)
Synonyms	Virginiamycin; Streptogramin; Pristinamycin; Mikamycin; Staphylomycin; Virginiamycin Complex; Antibiotic Complex 899; Antibiotic MDL 62,879; Vernamycin B; Vernamycin B Alpha; E 129; RP 12536
EINECS	Contact for details

Quality Control

Our Staphylomycin S1-Libr Compound (1:1) is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for potency and related substances, to ensure it meets stringent specifications for pharmaceutical and feed-grade applications. Certificates of Analysis (COA) detailing purity, identity, and microbiological potency are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed in a dry environment to prevent moisture absorption, which can affect stability and potency.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC)	Conforms to reference standard
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Total Virginiamycin)
Ratio (S1 : M1)	1 : 1 (± 10%)
Water Content (KF)	≤ 5.0%
Residue on Ignition	≤ 1.0%
Heavy Metals	≤ 20 ppm
Microbiological Potency	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.