B2B INGREDIENT HANDLING GUIDE · UPDATED AUGUST 2026

How to Store and Ship EGCG 98% Powder: Packaging, Moisture and Stability Guide

EGCG 98% powder is a high-purity green tea extract ingredient used in supplement, cosmetic and functional food formulation development. Because high-purity EGCG can be sensitive to moisture, light, oxygen and heat, correct packaging and storage are important for maintaining appearance, assay consistency and handling performance during international shipment.

1. Why Does EGCG Powder Require Careful Handling?

EGCG is a sensitive botanical compound that may be affected by moisture, heat, oxygen, light and the surrounding formulation environment.Exposure to these conditions may influence colour, odour, flowability, solubility and assay results over time.

The actual stability profile depends on the product grade, particle size, packaging system, extraction and purification process, storage conditions and intended application.    For this reason, buyers should follow the current product specification and supplier handling instructions rather than relying on a general storage statement.

2. Recommended Packaging for Bulk EGCG 98%

Bulk EGCG powder should be packed in a sealed inner-bag system placed inside a protective outer container.The selected packaging should protect the material from moisture, light, contamination and physical damage during handling and transport.

2.1 Inner Packaging

• Use food-contact or product-appropriate inner bags.
• Seal the bags securely after filling and after every sampling operation.
• Check that the inner packaging is free from damage, pinholes and leakage.
• Use moisture- and light-protective materials where required by the product specification.

2.2 Outer Packaging

• Use robust fibre drums, cartons or other approved shipping containers.
• Ensure the container is suitable for the product weight and transport route.
• Apply clear labels showing the product name, lot number, net weight, storage conditions and handling information.
• Use tamper-evident seals where required by the buyer’s quality system.

Packaging configuration may vary according to the order quantity, transport method, destination market and customer requirements.    Buyers should confirm the final packaging configuration before issuing a purchase order.

3. Warehouse Storage Conditions

Store EGCG 98% powder in a cool, dry and clean warehouse away from direct sunlight, heat sources and strong odours.The material should remain in its original sealed packaging until it is required for sampling or production.

4. Shipping EGCG Powder Internationally

International shipping should be planned around the product’s sensitivity, expected transit time, seasonal temperature and destination customs requirements.The shipper and buyer should agree on the packaging, documents and transport conditions before dispatch.

Before Dispatch

• Confirm the product name, quantity, lot number and packaging configuration.
• Check the batch COA and remaining shelf life.
• Prepare the commercial invoice, packing list and other destination-specific documents.
• Confirm whether the buyer needs an SDS/MSDS, TDS, allergen statement or certificate of origin.
• Review the shipping route and estimated transit time.

During Transport

• Avoid unnecessary exposure to direct sunlight and excessive heat.
• Protect the outer containers from water, impact and puncture damage.
• Use suitable palletization and carton or drum protection.
• For long-distance shipments, confirm whether additional temperature or moisture controls are needed.

Upon Receipt

• Inspect the outer packaging for damage, moisture or broken seals.
• Compare the lot number and quantity with the shipping documents.
• Record the receiving date and warehouse conditions.
• Quarantine damaged or questionable material until the quality team completes an evaluation.

5. Shelf Life and Stability Testing

Shelf life should be based on the supplier’s current specification and supporting stability information for the specific product grade.A general shelf-life statement should not replace a batch-specific review.

Stability testing may evaluate appearance, odour, moisture, assay, microbial quality and other quality attributes over time.    The testing conditions should reflect the intended packaging and market conditions.

Finished-product manufacturers should also perform stability testing in the actual formulation.    The stability of EGCG powder in its original package does not automatically predict the stability of EGCG in a liquid beverage, capsule blend, tablet or cosmetic emulsion.

6. What Should Buyers Ask the Supplier?

1. What are the recommended storage conditions for this exact EGCG grade?
2. What is the standard packaging configuration for samples and bulk orders?
3. What is the remaining shelf life at the time of shipment?
4. Can you provide the batch COA and product specification before dispatch?
5. Is the product sensitive to humidity during international transport?
6. What packaging options are available for long-distance or warm-climate shipping?
7. Can you provide SDS/MSDS, TDS, allergen and non-GMO documents?
8. What is the recommended procedure after opening the package?

Frequently Asked Questions

How should bulk EGCG 98% powder be stored?

Store it in its original sealed packaging in a cool, dry and clean place away from direct light, moisture and heat.    Follow the storage requirements stated in the current product specification.

Can EGCG powder be shipped by air freight?

Air freight may be used for many botanical ingredient shipments, subject to the product documents, packaging, carrier requirements and destination customs rules.    The shipping method should be confirmed for the exact order.

What happens if the EGCG powder becomes slightly darker?

A colour change should be evaluated against the product specification and batch history.    Do not make a quality decision based only on visual appearance. Contact the supplier’s quality team and arrange additional testing when necessary.

Can I reseal the package after opening?

The package should be resealed promptly using a clean and suitable sealing method.    Repeated opening increases exposure to humidity and air, so production teams should plan sampling and dispensing carefully.

Does the powder shelf life apply to my finished product?

No. Ingredient shelf life and finished-product shelf life are separate assessments.    The finished product manufacturer should conduct stability testing in the final formulation and packaging.

Disclaimer:Storage conditions, packaging, shelf life, shipping arrangements and product availability may vary by grade and batch.    Buyers should review the current technical documents and confirm the final requirements before placing an order.