Description
COA-BACKED NUTRITIONAL INGREDIENT
Vitamin K2 (MK-4) for B2B Fortification
Vitamin K2 (MK-4) is supplied for B2B fortification and premix projects. Specification centres on the declared potency, the carrier system and the stability behaviour in your finished format.
COA-Backed Specification
| Identity | Vitamin K2 (MK-4) |
|---|---|
| CAS No. | 11032-49-8 |
| Form and colour | Fine pale-yellow to yellow powder |
| Assay | 1.3% |
| 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 | LXKN260626 |
| Manufacture date | 26 Jun 2026 |
| Shelf life | Two years when stored properly |
Representative values do not replace the current shipment COA.
Buyer Decision Guide
Vitamin grades are specified by potency, carrier and purity, and the same vitamin name can cover several physical forms. Confirm the exact form and the analytical method before comparing quotations; overage and stability requirements are project-specific.
- Confirm the exact physical form and carrier
- Check declared potency and the assay method
- Review stability and overage needs for your format
- Confirm light, heat and oxygen sensitivity in handling
How This Grade Differs
Vitamin K2 (MK-4) must be compared on physical form, carrier and declared potency rather than on the vitamin name alone. Powder, oil, crystal and diluted forms behave differently in blending, dosing and shelf life.
Compare these related grades before approval:
For a substitution review, compare the MK-4 form of vitamin K2, the 1.3% HPLC assay, powder formulation and the current offered-batch COA. MK-7 is a separate specification.
Application Areas
- Vitamin premixes and dry blends
- Tablets, capsules and softgels
- Functional beverages and fortified foods
- Private-label nutrition projects
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 LXKN260626 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
What physical form does Vitamin K2 (MK-4) Powder 1.3% ship in?
Fine pale-yellow to yellow powder, milled to 98% through 80 mesh.
How long can we hold stock before use?
Two years when stored properly from the manufacture date when the pack stays sealed and dry.
Which impurity limits are declared?
Moisture and ash are held within the approved specification limits, with heavy metals and microbiology tested on every lot.
How do you control related substances?
Related substances are integrated on the same HPLC run used for the 1.3% assay.
Which batch is the quotation based on?
The page cites representative batch LXKN260626; the current lot’s certificate governs release.
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.
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.
What is the minimum order quantity?
The regular MOQ is typically 1 kg. An evaluation sample of 10-20 g can usually be arranged before a formal order, subject to stock.
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
