BULK INGREDIENT SOURCING
Grape Seed Extract
The catalog lists grape seed extract at 95% proanthocyanidins by UV. Use this specification as a starting point and provide the test method your purchasing team requires.
Raw material / identity
Grape seeds; request botanical identity, source and plant-part confirmation for the grade quoted.
Raw-material referenceSPECIFICATION FIRST
Compare the listed options
| Compound / specification | Listed range or grade | Test method |
|---|---|---|
| Proanthocyanidins | 95% | UV |
The figures above are catalog inquiry options, not confirmation of stock or a specification for every batch. Confirm the exact grade, current specification and supporting documents before ordering.
Clarify what an OPC specification measures
If your sourcing brief uses the term OPC, ask the supplier to define the compounds measured, the method and the reference standard. Confirm how the requested OPC specification relates to the listed proanthocyanidin UV assay before comparing quotations.
What to include in your inquiry
- Specify grape seed rather than grape skin; they are separate ingredients in this catalog.
- Request the full assay procedure or method reference and a representative certificate of analysis.
- State any requirements for carriers, extraction solvents and sample quantity with your bulk inquiry.
For a reusable purchase checklist, read our botanical extract sourcing guide.
LET’S TALK INGREDIENTS
Request a specification-led quote.
Include the ingredient, target assay, quantity, destination and application. Ask for the current specification, available documents and a sample of the proposed grade.
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