Description
STRAIN-IDENTIFIED CULTURE
Clostridium butyricum D306
Clostridium butyricum D306 is supplied as a strain-identified freeze-dried culture for B2B probiotic blends. The purchasing definition is the strain designation and the delivered potency rather than the species name alone.
COA-Backed Specification
| Identity | Clostridium butyricum |
|---|---|
| Strain designation | D306 |
| Plant part | Freeze-dried culture, strain-identified |
| Form and colour | Fine off-white to cream powder |
| Assay | Not less than 1.0 x 10^10 CFU/g |
| Method | HPLC |
| Particle size | 98% through 80 mesh |
| Loss on drying | <=5.0% |
| Ash | <=5.0% |
| Heavy metals | Within the limits of the approved specification |
| Microbiological limits | Within the limits of the approved specification |
| Representative batch | LXXJ260725 |
| Manufacture date | 25 Jul 2026 |
| Shelf life | Two years when stored properly |
Representative values do not replace the current shipment COA.
Buyer Decision Guide
Probiotics are specified by strain, potency at delivery and enumeration method. Confirm the strain designation, the CFU basis (per gram or per dose) and the overage required to hold potency through your shelf life and packing format.
- Confirm the strain designation, not only the species
- Check the CFU basis and enumeration method
- Review water activity and viability data
- Confirm cold-chain and packing requirements
How This Grade Differs
D306 is a specific strain and is not interchangeable with other strains of the same species. Potency, water activity and enumeration results differ by strain and by production lot, so qualification must be strain-based.
Compare these related grades before approval:
For a substitution review, compare botanical identity, plant part, assay target, analytical method, physical form and the current offered-batch COA.
Application Areas
- Probiotic capsules and stick packs
- Powdered functional beverages
- Fermented and cultured food projects
- Private-label microbiome products
Packaging and Delivery
- Evaluation sample typically 10-20 g, subject to stock
- Regular MOQ typically 1 kg
- 1 kg foil bag or 25 kg fibre drum with inner food-grade liner
- Custom packing and private-label options subject to confirmation
- Typical lead time 7-15 working days after deposit
Quality and Documentation
Representative batch LXXJ260725 supports the specification table above. Use the cited record for preliminary comparison and request the offered-lot COA for final technical approval. Batch COA, specification sheet, agreed third-party testing and export documents are available for buyer verification.
Frequently Asked Questions
How does the material behave in your process?
It is supplied as Fine off-white to cream powder at 98% through 80 mesh, so bulk density and flow are confirmed against your process before the first order.
Which impurity limits are declared?
Moisture and ash are held within the approved specification limits, with heavy metals and microbiology tested on every lot.
What assay does Clostridium butyricum D306 Freeze-Dried Powder carry on the certificate of analysis?
Assay Not less than 1.0 x 10^10 CFU/g, determined by HPLC.
Can the COA be matched to the lot you ship?
Yes. The certificate is issued for the shipped lot, which is the batch LXXJ260725 referenced on the specification.
What happens to viability during transport?
The declared count is Not less than 1.0 x 10^10 CFU/g; shipping conditions and the receiving test are agreed so the count is verified on arrival.
How is the material shipped?
Air and sea freight are both arranged, with the mode chosen against volume, destination and required date. Documents and the HS code are issued with the shipping instructions.
Are you a manufacturer or a trading company?
LongBio is Shaanxi Longsheng Biotechnology Co., Ltd., a direct manufacturer of botanical extracts and functional ingredients integrating R&D, production and export support. Factory review can be arranged by video or an on-site visit.
Can you produce to our own specification or packing?
Alternative assay targets, particle size, packing and private-label requirements are reviewed case by case, subject to production feasibility and a revised written specification.
Request COA, Sample or Quotation
Send your target specification, application, order quantity, destination country and required test limits.
Get the current batch COA, a sample or a quotation
