Shanghai, China.

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Langke Lab - Research Chemicals Vendor

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Samples Policy

For most our products, we could provide no more than 10g and no less than 5g samples, but deposit collect. The deposit depends on What & How many samples you like, and it could be deducted when you place an official order (reach MOQ) within 30 days after receiving the samples.

For some special products, the sample quantity we could provided is very small, please contact us for their details.

The MOQs are different for each products, it could be found on each product page or enquiry us.

The Important Points:

  1. Free samples are available, but deposit must collect in advance.
  2. The deposit could be deducted when you place official order (reach MOQ).
  3. The validity of deposit is 30 days.
  4. The deposit can’t be returned back if no official order.
  5. If you only want free samples, the cost will be very expensive.

For long-term customers, we will send new samples for testing free of charge from time to time.

Price & Discount

The prices we provide might not the lowest prices, but must be the most reasonable prices.

For our long-term customers, we offer the best prices and the newest samples free of charge to them.

If the purchase quantity could reach 2kg, we could offer 1% discount.

If the purchase quantity could reach 3kg, we could offer 2% discount.

If the purchase quantity could reach 5kg, we could offer 3% discount.

If the purchase quantity could reach 10kg, we could offer 5% discount.

For larger quantity, welcome to contact us for larger discounts.

Package & Transportation

The samples will be sent out from our office or the factories directly within 2 days after receiving the payment.

Usually, we send the samples by the agency of express company. It will take about 3 days from us or the factories to the agency. Then the agency will send them to you within 24 hours after receiving the parcel. The tracking number will be provided after the agency send out them. It will take about 7~10 days from the agency to you.

In order to you can receive the parcel successfully, the agency will use puerarin powder, pearl powder, snacks, daily necessities, etc. to declare on the package. The inside of the packaging is aluminum foil bag, the outside bag will be another product packaging.

Any further questions, ideas or doubt, please don’t hesitate to contact us.

Products & Stock & Supply Ability

We have three partner factories and several special factories. They could produce any products you want, but except illegal products.

For most of popular products, we have enough stock. Samples and orders are always available.

For products with low demand or high prices, we only have a few stock for samples, even no stock. But our partner factories could produce them according to your request.

For some special products, we only can provide no more than 1g sample, even can’t provide any samples to you. The minimum order quantity is 1kg.

All of our products have no limits in quantity, but prices are different. The prices depend on the quantity. The more the quantity, the lower the prices.