Terms of service

General Terms and Conditions (GTC)

Scope of Application
Conclusion of Contract
Right of Withdrawal
Services of the Provider
Customer Cooperation; Exclusion Period for Sample Testing
Prices, Payment Terms and Invoice
Delivery and Shipping Terms
Retention of Title
Liability for Defects / Warranty
Liability
Redemption of Discount Codes
Applicable Law
Place of Jurisdiction
Alternative Dispute Resolution
Data Protection and Use of Customer Data

1. Scope of Application

1.1

These General Terms and Conditions, hereinafter referred to as “GTC”, of Klar2O GmbH, hereinafter referred to as the “Provider”, apply to all contracts concluded by a consumer or entrepreneur, hereinafter referred to as the “Customer”, with the Provider via the online shop www.klar2o-labor.de or other sales channels of the Provider regarding the analyses, testing services, sampling or submission kits, and other goods and services offered by the Provider. Deviating, conflicting, or supplementary general terms and conditions of the Customer shall not become part of the contract unless the Provider expressly agrees to their validity in text form.

1.2

These GTC shall also apply accordingly to the purchase and redemption of vouchers, unless deviating provisions for vouchers are set out below.

1.3

A consumer within the meaning of these GTC is any natural person who enters into a legal transaction for purposes that predominantly cannot be attributed to their commercial or independent professional activity.

1.4

An entrepreneur within the meaning of these GTC is a natural or legal person or a partnership with legal capacity that acts in the exercise of its commercial or independent professional activity when concluding a legal transaction.

2. Conclusion of Contract

2.1

The analyses, goods, products, and other services presented in the Provider’s online shop do not constitute a binding offer by the Provider, but rather an invitation to the Customer to submit a binding offer to conclude a contract.

2.2

The Customer may submit the offer via the online order form integrated into the Provider’s online shop. After placing the selected analyses, goods, products, and/or services in the virtual shopping cart and completing the electronic order process, the Customer submits a legally binding contractual offer with regard to the goods contained in the shopping cart by clicking the button that completes the order process. The Customer may also submit the offer to the Provider by email, messenger or chat message, online contact form, post, or telephone.

2.3

The Provider may accept the Customer’s offer within five (5) days,

by sending the Customer a written order confirmation or an order confirmation in text form, for example by email, whereby receipt of the order confirmation by the Customer is decisive; or
by delivering the ordered goods to the Customer, whereby receipt of the goods by the Customer is decisive; or
by requesting payment from the Customer after the Customer has placed the order.

If several of the aforementioned alternatives apply, the contract is concluded at the time when one of the aforementioned alternatives occurs first. The period for acceptance of the offer begins on the day after the Customer sends the offer and ends upon expiry of the fifth day following the sending of the offer. If the Provider does not accept the Customer’s offer within the aforementioned period, this shall be deemed a rejection of the offer, with the result that the Customer is no longer bound by their declaration of intent.

2.4

If a payment method offered by PayPal is selected, payment processing shall be carried out via the payment service provider PayPal (Europe) S.à r.l. et Cie, S.C.A., 22-24 Boulevard Royal, L-2449 Luxembourg, hereinafter referred to as “PayPal”, subject to the PayPal Terms of Use, available at https://www.paypal.com/de/webapps/mpp/ua/useragreement-full or, if the Customer does not have a PayPal account, subject to the terms for payments without a PayPal account, available at https://www.paypal.com/de/webapps/mpp/ua/privacywax-full. If the Customer pays using a payment method offered by PayPal and selectable during the online order process, the Provider hereby declares acceptance of the Customer’s offer at the time the Customer clicks the button that completes the order process.

2.5

When submitting an offer via the Provider’s online order form, the contract text is stored by the Provider after conclusion of the contract and sent to the Customer in text form, for example by email or letter, after the Customer has submitted the order. The Provider does not make the contract text accessible beyond this. If the Customer has created a customer account in the Provider’s online shop before submitting the order, the order data will be archived on the Provider’s website and can be accessed by the Customer free of charge via their password-protected customer account by entering the corresponding login details.

2.6

Before submitting a binding order via the Provider’s online order form, the Customer can identify possible input errors by carefully reading the information displayed on the screen. An effective technical means for better recognition of input errors may be the browser’s zoom function, which enlarges the display on the screen. During the electronic order process, the Customer can correct their entries using the usual keyboard and mouse functions until they click the button that completes the order process.

2.7

The German language is available for the conclusion of the contract.

2.8

Order processing and communication generally take place by email and automated order processing. The Customer must ensure that the email address provided for order processing is correct so that emails sent by the Provider can be received at this address. In particular, the Customer must ensure that all emails sent by the Provider or by third parties commissioned by the Provider to process the order can be technically delivered, for example when using spam filters and/or blacklists.

3. Right of Withdrawal

3.1

Consumers generally have a right of withdrawal.

3.2

Further information on the right of withdrawal can be found in the Provider’s withdrawal instructions.

3.3

The right of withdrawal does not apply to consumers who, at the time of conclusion of the contract, do not belong to any Member State of the European Union and whose sole place of residence and delivery address at the time of conclusion of the contract are outside the European Union.

4. Services of the Provider

4.1

In the case of an order on invoice, the Provider shall send the sampling kit or the ordered goods to the delivery address specified by the Customer during the order process no later than within 24 hours after order confirmation. If another payment method is selected, the Provider shall do so no later than within 24 hours after order confirmation and successful payment processing via the respective payment service provider. Saturdays, Sundays, and public holidays are excluded when calculating this period.

4.2

If the Customer sends the sample collected in accordance with the respective instructions to the specified laboratory already commissioned by the Customer using the return materials provided, the Provider shall make the analysis result available to the Customer within the analysis time specified in the online shop for the respective product, calculated from receipt by the laboratory. In special exceptional cases, for example a high sickness rate or equipment failure, the specified analysis time may be exceeded. The Provider is also entitled to refuse provision of the analysis result as long as the Customer has not paid the remuneration due for this or is in default with an agreed advance payment. This does not apply if the Customer has a statutory right of retention in this respect.

4.3

The Provider shall inform the Customer by email about the status of the sample submission and the availability of the analysis result and shall make it available to the Customer by email, post, or in a customer account.

4.4

The Provider points out that, because the sample is collected by the Customer themselves, the analysis results can generally not be used for official or court purposes.

5. Customer Cooperation; Exclusion Period for Sample Testing

5.1

The Customer must collect and, where applicable, label the sample in accordance with the instructions provided. If the Customer does not follow the instructions, the Provider is entitled to refuse testing of the submitted sample.

5.2

For water analyses, the Provider can only test drinking water and well water, but not wastewater or water contaminated in any other way. Contaminated water would damage the laboratory equipment used to test the water. Customers must therefore not send samples containing wastewater or intentionally contaminated water, for example dissolved medication. The Provider reserves the right to assert claims for damages against Customers in such cases, provided the legal requirements for this are met.

5.3

The Customer must send the collected sample to the specified laboratory already commissioned by the Customer using the return materials provided. If the sampling kit is ordered with a delivery address in Germany, Austria, or the United Kingdom, the shipping costs for sending the collected sample to the laboratory within Germany and Austria are already included in the price of the sampling kit.

5.4

In the event of loss or damage to parts of the sampling kit, the Customer may receive replacement parts from the Provider upon request and against payment of a handling and shipping fee.

5.5

The sample must be collected and sent to the specified laboratory within 24 months from receipt of the sampling kit or return materials by the Customer.

5.7

The aforementioned periods may be shorter depending on the shelf life of the components of the sampling kit if a shorter period is expressly indicated in the online shop for the respective product.

6. Prices, Payment Terms and Invoice

6.1

Unless otherwise stated in the Provider’s product and service description, the prices stated are total prices including statutory value-added tax. In the business customer area, prices may also be displayed excluding statutory value-added tax. Any additional delivery and shipping costs that may apply are stated separately in the respective product description.

6.2

For deliveries to countries outside the European Union, additional costs may arise in individual cases for which the Provider is not responsible and which must be borne by the Customer. These include, for example, costs for money transfers by credit institutions, such as bank transfer fees or exchange rate fees, or import duties or taxes, such as customs duties. Such costs may also arise in relation to money transfers if the delivery is not made to a country outside the European Union but the Customer makes the payment from a country outside the European Union.

6.3

The available payment option or options are communicated to the Customer in the Provider’s online shop.

6.4

If the payment method purchase on invoice is selected, the purchase price becomes due after the goods have been delivered and invoiced. In this case, the purchase price must be paid within fourteen (14) days of receipt of the invoice without deduction, unless otherwise agreed. The Provider reserves the right to offer the payment method purchase on invoice only up to a certain order volume and to reject this payment method if the specified order volume is exceeded. In this case, the Provider shall inform the Customer of the corresponding payment restriction in its payment information in the online shop.

6.5

If the payment method Klarna purchase on invoice is selected, the purchase price becomes due after the goods have been delivered and invoiced. In this case, the purchase price must be paid without deduction to Klarna AB, Sveavägen 46, 11134 Stockholm, Sweden, www.klarna.de, within 30 days from the invoice date, unless otherwise agreed. The payment method purchase on invoice requires a successful credit check by Klarna AB. If the Customer is permitted to use the payment method purchase on invoice after the credit check, payment is processed in cooperation with Klarna AB, to which the Seller assigns its payment claim. In this case, the Customer can only make payment to Klarna AB with debt-discharging effect. In all other respects, the General Terms and Conditions of Klarna AB apply in this regard and can be accessed by the Customer during the order process. The Seller reserves the right to offer the payment method purchase on invoice only up to a certain order volume and to reject this payment method if the specified order volume is exceeded. In this case, the Seller shall inform the Customer of the corresponding payment restriction in its payment information in the online shop.

If a payment method offered via the payment service “Klarna” is selected, payment processing is carried out via Klarna Bank AB (publ), Sveavägen 46, 111 34 Stockholm, Sweden, hereinafter referred to as “Klarna”. Further information and Klarna’s terms and conditions in this regard are available here: https://cdn.klarna.com/1.0/shared/content/legal/terms/K502554/de_de/user

6.6

If a payment method offered via the payment service “PayPal” is selected, payment processing is carried out via PayPal, whereby PayPal may also use the services of third-party payment service providers for this purpose. If the Provider also offers payment methods via PayPal for which it makes advance performance to the Customer, for example purchase on invoice or installment payment, the Provider assigns its payment claim in this respect to PayPal or to the payment service provider commissioned by PayPal and specifically named to the Customer. Before accepting the Provider’s declaration of assignment, PayPal or the payment service provider commissioned by PayPal carries out a credit check using the Customer data transmitted. The Provider reserves the right to refuse the selected payment method to the Customer in the event of a negative check result. If the selected payment method is approved, the Customer must pay the invoice amount within the agreed payment period or in the agreed payment intervals. In this case, the Customer can only make payment to PayPal or to the payment service provider commissioned by PayPal with debt-discharging effect. However, even in the event of assignment of the claim, the Provider remains responsible for general customer inquiries, for example regarding the goods, delivery time, shipment, returns, complaints, withdrawal declarations and returns, or credit notes.

6.7

If a payment method offered via the payment service “Shopify Payments” is selected, payment processing is carried out by the payment service provider Stripe Payments Europe Ltd., 1 Grand Canal Street Lower, Grand Canal Dock, Dublin, Ireland, hereinafter referred to as “Stripe”. The individual payment methods offered via Shopify Payments are communicated to the Customer in the Provider’s online shop. Stripe may use other payment services to process payments, for which special payment terms may apply and to which the Customer may be separately referred. Further information on “Shopify Payments” is available online at https://www.shopify.com/legal/terms-payments-de.

6.8

If the Customer defaults on payment, the Provider reserves the right to charge reminder fees to the extent permitted by law.

6.9

The Provider and the Customer agree that invoices shall be issued exclusively electronically and sent to the Customer by email. The Customer must ensure that emails containing the invoice and any payment reminders or dunning notices can be delivered to them, in particular that they do not remain in the Customer’s spam filter or get blocked by blacklisting.

6.10

Subsequent changes to Customer details in an invoice that has already been issued are not possible unless a change to the invoice is legally required.

7. Delivery and Shipping Terms

7.1

If the Provider offers shipment of the goods, delivery shall be made within the delivery area specified by the Provider to the delivery address provided by the Customer, unless otherwise agreed. For transaction processing, the delivery address specified during the Provider’s order processing is decisive.

7.2

If delivery of the goods fails for reasons attributable to the Customer, the Customer shall bear the reasonable costs incurred by the Provider as a result. This does not apply with regard to the costs of outbound delivery if the Customer effectively exercises their right of withdrawal. In the event of effective exercise of the right of withdrawal by the Customer, the provision made in the Provider’s withdrawal instructions shall apply to the return shipping costs.

7.3

If the Customer acts as an entrepreneur, the risk of accidental loss and accidental deterioration of the sold goods passes to the Customer as soon as the Provider has delivered the item to the forwarding agent, carrier, or other person or institution designated to carry out the shipment. If the Customer acts as a consumer, the risk of accidental loss and accidental deterioration of the sold goods generally passes only upon handover of the goods to the Customer or to a person authorized to receive them. Notwithstanding this, the risk of accidental loss and accidental deterioration of the sold goods also passes to the Customer in the case of consumers as soon as the Provider has delivered the item to the forwarding agent, carrier, or other person or institution designated to carry out the shipment if the Customer has commissioned the forwarding agent, carrier, or other person or institution designated to carry out the shipment and the Provider had not previously named this person or institution to the Customer.

7.4

The Provider reserves the right to withdraw from the contract in the event of incorrect or improper self-supply. This applies only if the non-delivery is not attributable to the Provider and the Provider has concluded a specific covering transaction with the supplier with due care. The Provider shall make all reasonable efforts to procure the goods. In the event of non-availability or only partial availability of the goods, the Customer shall be informed without undue delay and the consideration shall be refunded without undue delay.

7.5

Self-collection is not possible for logistical reasons.

8. Retention of Title

If the Provider makes advance performance, the Provider retains title to the delivered goods until the purchase price owed has been paid in full.

9. Liability for Defects / Warranty

Unless otherwise stated in the following provisions, the statutory provisions on liability for defects apply. Deviating from this, the following applies to contracts for the delivery of goods:

9.1

If the Customer acts as an entrepreneur,

the Provider has the choice of the type of subsequent performance;
for new goods, the limitation period for defect claims is one year from delivery of the goods;
for used goods, defect claims are excluded;
the limitation period does not restart if a replacement delivery is made within the scope of liability for defects.

9.2

The limitations of liability and shortened limitation periods set out above do not apply

to claims for damages and reimbursement of expenses by the Customer;
in the event that the Provider fraudulently concealed the defect;
to goods that have been used for a building in accordance with their usual purpose and have caused its defectiveness;
to any existing obligation of the Provider to provide updates for digital products in contracts for the delivery of goods with digital elements.

9.3

Furthermore, for entrepreneurs, the statutory limitation periods for any existing statutory right of recourse remain unaffected.

9.4

If the Customer acts as a merchant within the meaning of Section 1 of the German Commercial Code, the Customer is subject to the commercial duty to inspect and give notice of defects pursuant to Section 377 of the German Commercial Code. If the Customer fails to comply with the notification obligations regulated therein, the goods shall be deemed approved.

9.5

If the Customer acts as a consumer, the Customer is requested to complain to the delivery agent about delivered goods with obvious transport damage and to inform the Provider of this. If the Customer does not comply with this, this shall have no effect whatsoever on their statutory or contractual defect claims.

10. Liability

The Provider shall be liable to the Customer for all contractual, quasi-contractual, and statutory claims, including tort claims, for damages and reimbursement of expenses as follows:

10.1

The Provider shall be liable without limitation on any legal grounds

in the event of intent or gross negligence;
in the event of intentional or negligent injury to life, body, or health;
on the basis of a guarantee promise, unless otherwise regulated in this respect;
on the basis of mandatory liability, for example under the German Product Liability Act.

10.2

If the Provider negligently breaches a material contractual obligation, liability shall be limited to the foreseeable damage typical for the contract, unless liability is unlimited pursuant to the preceding clause. Material contractual obligations are obligations imposed on the Provider by the content of the contract in order to achieve the purpose of the contract, the fulfillment of which makes the proper performance of the contract possible in the first place, and on compliance with which the Customer may regularly rely.

10.3

In all other respects, liability of the Provider is excluded.

10.4

The above liability provisions also apply with regard to the Provider’s liability for its vicarious agents and legal representatives.

11. Redemption of Discount Codes

11.1

Vouchers issued free of charge by the Provider as part of promotional campaigns with a specific validity period and which cannot be purchased by the Customer, hereinafter referred to as “discount codes”, can only be redeemed in the Provider’s online shop, only within the specified period, and only under the stated conditions.

11.2

Individual products may be excluded from the discount campaign if a corresponding restriction results from the content of the discount code.

11.3

Discount codes can only be redeemed before completion of the order process. Subsequent offsetting is not possible.

11.4

Only one discount code may be redeemed per order.

11.5

The value of the goods must be at least equal to the amount of the discount code. Any remaining balance will not be refunded by the Provider.

11.6

If the value of the discount code is not sufficient to cover the order, one of the other payment methods offered by the Provider may be selected to pay the difference.

11.7

The balance of a discount code shall neither be paid out in cash nor bear interest.

11.8

The discount code will not be refunded if the Customer returns the goods or service paid for in whole or in part with the discount code within the scope of their statutory right of withdrawal.

11.9

The discount code is transferable. The Provider may render performance with discharging effect to the respective holder who redeems the discount code in the Provider’s online shop. This does not apply if the Provider has knowledge, or grossly negligent lack of knowledge, of the lack of entitlement, incapacity, or lack of representative authority of the respective holder.

12. Applicable Law

12.1

All legal relationships between the parties shall be governed by the law of the Federal Republic of Germany, excluding the laws on the international sale of movable goods. For consumers, this choice of law applies only insofar as the protection granted is not withdrawn by mandatory provisions of the law of the country in which the consumer has their habitual residence.

12.2

Furthermore, this choice of law does not apply with regard to the statutory right of withdrawal for consumers who, at the time of conclusion of the contract, do not belong to any Member State of the European Union and whose sole place of residence and delivery address at the time of conclusion of the contract are outside the European Union.

13. Place of Jurisdiction

If the Customer acts as a merchant, a legal entity under public law, or a special fund under public law with its registered office in the territory of the Federal Republic of Germany, the exclusive place of jurisdiction for all disputes arising from this contract shall be the Provider’s registered office. If the Customer has its registered office outside the territory of the Federal Republic of Germany, the Provider’s registered office shall be the exclusive place of jurisdiction for all disputes arising from this contract if the contract or claims arising from the contract can be attributed to the Customer’s professional or commercial activity. In the aforementioned cases, however, the Provider shall in any case also be entitled to bring proceedings before the court at the Customer’s registered office.

14. Alternative Dispute Resolution

The Provider is neither obliged nor willing to participate in dispute resolution proceedings before a consumer arbitration board.

15. Data Protection and Use of Customer Data

The Provider points out that the customer data collected as part of the order, in particular the postal code, is processed in anonymized form in order to enable a Germany-wide geographical evaluation of the measurement results. Postal codes are used exclusively for statistical purposes in order to create an aggregated map of Germany that does not allow conclusions to be drawn about individual customers. No processing of personal data beyond the postal code takes place.

By placing the order, the Customer declares their consent to the anonymized use of this data for the aforementioned evaluation. The Customer has the right to object to the use of their data at any time. The objection may be addressed to the Provider at any time in writing or by email without affecting the execution of the order.

Last updated: 20 April 2026

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