China Manufacturing Landscape for Milbemycin Oxime (CAS 129496-10-2)
Milbemycin Oxime stands as one of the most commercially significant veterinary antiparasitic APIs globally, and China has emerged as the primary manufacturing base for this critical compound. Our production facility in Zhejiang Province specializes in the fermentation-derived production of macrocyclic lactone antiparasitics, with Milbemycin Oxime representing our flagship product. We supply directly to veterinary pharmaceutical formulators in North America, Europe, Latin America, and Southeast Asia.
The production of Milbemycin Oxime requires specialized fermentation expertise using Streptomyces hygroscopicus subsp. aureolacrimosus, followed by complex downstream processing including oximation chemistry. Our 18 years of continuous production experience have yielded proprietary process improvements that deliver industry-leading fermentation titers and overall process yields, translating directly into competitive pricing for our customers.
Manufacturing Process & Facility
Our manufacturing process begins with controlled fermentation of proprietary high-yield Streptomyces strains in stirred-tank bioreactors. The fermentation broth undergoes solvent extraction, chromatographic separation of milbemycin A3 and A4 components, oximation to form the oxime derivatives, and final purification through crystallization. The A3:A4 ratio is controlled within pharmacopeial specifications through fermentation parameter optimization.
Key facility features:
- quality-compliant fermentation facility with vessels up to 30,000L capacity
- Dedicated extraction and purification suites with automated chromatography systems
- ISO Class 7 cleanroom areas for final processing and packaging operations
- Annual production capacity of 8 metric tons of Milbemycin Oxime API
- On-site QC laboratory with LC-MS/MS, preparative HPLC, and microbiology testing
- Dedicated R&D center for continuous strain improvement and process optimization
All manufacturing operations follow detailed batch records with over 120 in-process control points, ensuring traceability and consistency across every production campaign.
Quality Standards & Multi-Pharmacopeial Compliance
Our Milbemycin Oxime API is tested against specifications meeting or exceeding USP and EP requirements:
| Parameter | Specification | Test Method |
|---|---|---|
| Appearance | White to slightly yellow powder | Visual |
| Identification | Positive by IR, HPLC | IR/HPLC |
| Assay (A3 + A4, anhydrous) | ≥95.0% | HPLC |
| A4 Component Ratio | 20–35% of total milbemycins | HPLC |
| Related Substances (total) | ≤3.0% | HPLC |
| Any Single Impurity | ≤0.5% | HPLC |
| Water Content | ≤2.0% | Karl Fischer |
| Residual Solvents | Meets ICH Q3C | GC-HS |
| Heavy Metals | ≤20 ppm | ICP-MS |
| Microbial Limits | TAMC ≤1000 CFU/g | USP <61> |
Regulatory Documentation
We provide full regulatory support for Milbemycin Oxime API registration in all major veterinary pharmaceutical markets:
- US FDA CVM Drug Master File — active and maintained
- EU ASMF available for submission through veterinary mutual recognition procedures
- China NMPA registration for veterinary API manufacturing
- Complete process validation package (3 consecutive commercial batches)
- Stability studies per ICH/VICH guidelines with 36-month long-term data
- Detailed impurity profile with identification and qualification of all specified impurities
- TSE/BSE compliance statement confirming no animal-derived materials in process
Our regulatory affairs department has supported over 30 customer registration projects across 25 countries and can provide customized documentation packages for any target market.
Packaging & Logistics
Milbemycin Oxime is packaged to ensure stability and compliance with international shipping requirements:
- Primary: Double polyethylene bags with desiccant sachets
- Secondary: Fiber drums (10 kg, 25 kg) or HDPE containers (1 kg, 5 kg)
- Labeling compliant with GHS, IATA, and customer-specific requirements
- Storage: Below 25°C, protected from light and moisture
- Shelf life: 36 months from date of manufacture
We export through Shanghai and Ningbo ports with experienced freight forwarding partners. Standard Incoterms offered include FOB, CIF, and DDP. Export documentation includes phytosanitary certificates, Certificates of Origin, and all customs clearance paperwork.
Competitive Pricing & Supply Reliability
As a direct manufacturer with proprietary fermentation strains and backward-integrated starting material supply, our Milbemycin Oxime pricing reflects genuine production economics:
- Proprietary high-yield strains delivering superior fermentation productivity
- Integrated solvent and catalyst recovery systems minimizing production costs
- Continuous production campaigns ensuring consistent supply availability
- Safety stock policy maintaining 2-3 months inventory for contracted customers
We accommodate order sizes from 100g evaluation samples to multi-ton annual supply contracts. Volume-tiered pricing with annual escalation caps provides budget certainty for our long-term partners. Contact our veterinary API sales team for current pricing and availability.