What is the shelf life of the extract?

The shelf life is 2 years if sealed and stored properly in a cool, dry place.

Can I get free samples?

Yes, we provide 10-20g free samples for evaluation.

What are the payment terms?

The standard payment term is T/T (Telegraphic Transfer).

Comext ISO Factory Supply High Quality Giant Knotweed Extract

Name: Comext ISO Factory Supply High Quality Giant Knotweed Extract
Brand: Changsha Comext Biotech Co., Ltd.
SKU: 2074211085

Hunan, ChinaChangsha Comext Biotech Co., Ltd.

US$20.00-199.00

1 KG

Sample price:US$20.00/bag.Request sample

Product profile

Customization

Available

Certification

ISO, Kosher, Halal, Organic, Fssc

Assay Method

HPLC

Model NO.

KNOTWEED-3

Application Form

Lotion, Tablet, Capsule

Application

Food, Health Care Products, Medicine

State

Powder

Extract Source

Rhizome

Botanical Name

Polygonum Cuspidatum

Appearance

Yellow Brown to off White Knotweed Extract Powder

Used Part

Rhizome

Active Ingredient

Natural Resveratrol

Standard

Meet USP/Ep

Function

Natural Antioxidant

Us Warehouse

According to Your Demand

Sample

10-20g Free Samples

Solvent Residue

<5000ppm

PAHs

<50ppb

Identification

Conform with Standard

Transport Package

25kg/Drum

Specification

50% 98% Resveratrol

Trademark

Comext

Origin

China

HS Code

130219

Production Capacity

10t Per Month

Key features

High Purity Resveratrol: Contains 50%-98% Resveratrol verified by HPLC assay method.

Multiple Certifications: Certified ISO, Kosher, Halal, Organic, and FSSC for global compliance.

OEM/ODM Customization: Supports customization from samples and designs for specific needs.

US Warehouse Support: Available stock in US warehouse according to customer demand.

Free Sample Availability: Provides 10-20g free samples for quality testing and evaluation.

Strict Quality Control: Meets USP/EP standards with low solvent residue and heavy metals.

Versatile Applications: Suitable for lotions, tablets, capsules in food and medicine sectors.

Natural Antioxidant: Rich in polyphenols and tannins to minimize oxidative stress effects.

Company profile

Quality AssuranceOverseas WarehouseHigh Repeat Buyers ChoiceProduction Process Visualization

Changsha Comext Biotech Co., Ltd.

Hunan, China

Business Type: Manufacturer/Factory, Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs CertifiedExport Year: 9 Years CertifiedNearest Port: Shanghai Port,Average Response Time: ≤2.31h

AI-Powered supplier vetting

SummaryComext presents capabilities across export trade, manufacturing, service, quality control, R&D, and sustainability. It reports multiple management-system certifications and states that quality assurance is present. Service-related procedures exist for supplier assessment, corrective and preventive actions, and customer complaints, but records are not available. The supplier reports in-stock and overseas-warehouse capabilities, OEM service for popular brands, ODM services, and customization from samples or designs. However, it has no valid manufacturing-capacity contract with its affiliated subcontractor, no new products in the past year, no R&D patents, no overseas showroom, and no available SDK. Financial credibility cannot be assessed because the provided financial entries contain only years and no usable financial information.

CertificationsThe supplier reports OHSAS/OHSMS 18001, ISO 9001, ISO 14001, and QC 080000 certifications under its supplier management systems. These explicitly indicate a broad set of reported management-system certifications.

R&D capabilityThe supplier provides ODM services and has documented R&D inputs, outputs, reviews, verification, and validation for audit, but reports no new products in the past year and zero R&D patents. The evidence shows an established R&D process but limited demonstrated recent innovation output.

Production capacityThe supplier reports quality assurance, in-stock capability, lead times within 15 working days in both peak and off-season, and OEM service for popular brands. However, it has no valid manufacturing-capacity contract with its factory or affiliated subcontractors, creating a documented production-governance deficiency.

Customization capabilityThe supplier explicitly offers customization from samples and designs, as well as ODM services, and reports OEM service for popular brands. These statements directly support capability for customer-specific product development and manufacturing.