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Sterile | Low Endotoxin | Visual Identity Verification | –Ca²⁺/–Mg²⁺ PBS Wash Buffer

What Is C-Check PBS?

C-Check PBS (–Ca²⁺/–Mg²⁺) is a phosphate-buffered saline wash buffer designed for routine cell washing, dilution, and handling workflows with built-in visual verification of buffer identity and pH condition.

Standard PBS solutions are clear and visually indistinguishable from water, which can lead to accidental errors such as using water instead of PBS or unknowingly using buffer that has drifted outside the desired pH range.

C-Check PBS incorporates a trace visual indicator that allows researchers to quickly confirm buffer identity and detect potential pH drift during routine laboratory workflows.

The formulation remains fully PBS-compatible while avoiding proteins, serum, preservatives, or undefined additives that could interfere with downstream assays.

Quick Product Facts

Product Overview

Routine laboratory workflows often involve multiple clear liquids, including water, buffers, and culture media. Because standard PBS is colorless, accidental mix-ups or unnoticed buffer degradation may occur during busy workflows.

Potential risks include:

• accidental use of water instead of PBS
• use of buffer that has drifted outside neutral pH
• contamination or degradation going unnoticed
• inconsistent results due to handling errors

C-Check PBS is designed to help reduce these preventable errors by providing instant visual confirmation of buffer identity and approximate pH condition during routine cell culture workflows.

Key Features

Visual Buffer Identity Verification

Trace indicator provides immediate visual confirmation that the correct buffer is being used.

Early Warning for pH Drift

Color changes may help alert researchers to possible buffer degradation or environmental pH changes.

Sterile & Low Endotoxin

Sterile-filtered solution with controlled endotoxin levels suitable for sensitive cell culture workflows.

Calcium & Magnesium-Free

Removal of Ca²⁺ and Mg²⁺ helps reduce cell adhesion during washing steps.

Phenol Red-Free Indicator System

Designed to provide visual verification while minimizing interference with most workflows.

Ready-To-Use Buffer

Supplied as a sterile solution requiring no preparation or dilution.

Typical Applications

C-Check PBS may be used in workflows including:

• routine cell culture washing
• removal of residual culture media
• pre-trypsin washing steps
• flow cytometry washing and handling
• sample dilution and preparation
• training laboratories and shared core facilities

Researchers should evaluate suitability for their specific experimental systems.

Standard PBS Vs C-Check PBS

Cell Line Compatibility

Researchers should validate compatibility with sensitive primary cells.

Why Use a Visual-Verification PBS?

During routine laboratory workflows, accidental buffer errors can occur when clear solutions appear identical.

Buffers that include visual verification features may help reduce:

• accidental use of water instead of PBS
• unnoticed pH drift or contamination
• inconsistent results caused by handling mistakes
• training errors in shared laboratories

A visually verifiable buffer can help support more reliable routine cell handling workflows.

Quality Control

Each batch is manufactured under controlled conditions and tested to ensure consistent performance.

Quality parameters typically include:

• pH verification
• sterility testing
• endotoxin specification
• visual inspection for clarity
• indicator verification

Refer to lot-specific Certificates of Analysis (COA) for detailed quality information.

Important Use Note

C-Check PBS is optimized for routine wash and handling workflows.

For ultra-sensitive fluorescence or optical assays, researchers may perform a final rinse with clear PBS or culture medium if required by their assay.

Frequently Asked Questions

What is C-Check PBS used for?

It is designed for routine washing, dilution, and handling of cells with visual verification of buffer identity.

Why does the buffer have a light color?

The light tint comes from a trace indicator used to confirm buffer identity and detect potential pH drift.

Is C-Check PBS the same as standard PBS?

Functionally yes. It is a –Ca²⁺/–Mg²⁺ PBS buffer with an added visual verification feature.

Can C-Check PBS be used for flow cytometry?

Yes. It can be used for routine washing and sample preparation steps.

Is this product intended for diagnostic use?

No. C-Check PBS is Research Use Only (RUO).

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