Conveniently Manage Hazardous Substances
With GeSi, you can integrate safety data sheets, hazardous substances inventories, risk assessments, and operating instructions into a single structure—using either the proven GeSi³ solution or the new browser-based GeSi4 solution.
- Review Safety Data Sheets and Process Them Digitally
- Structure the Hazardous Substances List
- Create and Organize Risk Assessments and Operating Instructions
- Provide reading portals for employees
- Select GeSi³ and GeSi⁴ based on the initial conditions
What is the GeSi GefStoff-Profi software?
GefStoff-Profi is a hazardous materials management software that maps out interconnected processes rather than individual documents—from safety data sheets to risk assessments to operating instructions.
The Most Important Thing
- Two versions: GeSi³ and Gesi4
- 100% REACH-compliant
- MSDSs are retrieved and reviewed
- Available as on-premises and SaaS
Professional Hazardous Materials Management with GeSi
With GeSi, you can map key hazardous substance processes in a structured and traceable manner. Safety data sheets serve as the data foundation from which hazardous substance inventories, risk assessments, and operating instructions are derived. Relevant information can then be made available to employees in a targeted manner.
with SDBcheck®
Review, digitize, and process data from the safety data sheet.
SDBcheck® makes relevant data from supplier safety data sheets accessible—for hazardous substance inventories, GBU, and operating instructions
Accurately record hazardous substances, locations, and quantities.
You can keep track of materials, quantities, workstations, and storage locations in a centralized and traceable manner.
Map risk assessments and operating instructions directly within the system.
Hazardous Substance GBUs and operating instructions are created and maintained directly within the software.
Make safety data sheets, operating instructions, and other information on hazardous substances easily accessible.
Make safety data sheets, operating instructions, and information on hazardous substances available via the intranet or read-only portals, depending on your company's structure.
Benefits for You
End-to-End Processes
instead of siloed solutions and Excel spreadsheets
A shared database
Less duplication of care, easy to understand
Working in Compliance with REACH
Verified data, documented in a legally compliant manner
GeSi consists of specialists in the fields of chemistry, software development, legal compliance and occupational medicine.
Our chemists, developers and occupational physicians will not leave you on your own, even with complex specialist and technical issues.
Over 30 years of experience in the field of hazardous substances, SDS and occupational safety make GeSi a legally compliant tool.
GeSi Software operates an information security management system certified by TÜV SÜD. We protect your data.
That's why GeSi
We are experts
We offer support
We have experience
Over 30 years of experience in the field of hazardous substances, SDS and occupational safety make GeSi a legally compliant tool.
We work with ISMS
Two Approaches to Professional Hazardous Materials Management
GeSi offers two software solutions for professional hazardous substance management: GeSi³ GefStoff-Profi and GeSi4 GefStoff-Profi. Both are based on GeSi Software’s technical expertise. At the same time, they differ in terms of their range of functions, technical foundation, and starting point.

For companies that want to start working right away with a mature system, a wide range of features, and established hazardous materials processes.
- ✓ Established
- ✓ Comprehensive set of features
- ✓ Proven in practice
- ✓ For complex requirements
- ✓ Can be integrated with FaSi-Profi and SDB-Profi
You’ll be using a proven, expert-developed solution with a wide range of features, established processes, and extensive practical experience in professional hazardous materials management.

For companies that are launching browser-based solutions, want to start using GeSi4 early on, and would like to participate in the Early Access program for the new generation of software.
- ✓ Browser-based
- ✓ SaaS and on-premises
- ✓ Early Access
- ✓ Priority Support
- ✓ Opportunity to contribute
It works in a browser, regardless of the device you're using—whether you're in the office, working from home, or on the go. There's no need for a local installation on individual workstations. GerSi4 can be deployed as a SaaS solution or run on your own IT infrastructure.

, Chemist, Support/Product Training, GeSi Software GmbH
FAQ
What is professional hazardous materials management?
Professional hazardous substance management encompasses all tasks related to the safe and traceable handling of hazardous substances within a company. This includes safety data sheets, a hazardous substance inventory, risk assessments, operating instructions, and the provision of relevant information to employees. GeSi Software’s hazardous substances management software helps to bring these steps together in a structured way and to map hazardous substances processes in a traceable manner.
Why is an Excel spreadsheet often not enough for hazardous materials management?
Excel spreadsheets may be sufficient for simple overviews, but they usually provide only a limited representation of interconnected hazardous substance processes. Safety data sheets, hazardous substance inventories, risk assessments, operating instructions, updates, and read access must often be maintained in multiple locations. Specialized hazardous materials management software reduces siloed solutions, prevents duplicate data entry, and brings together key workflows in a more structured manner.
What role do safety data sheets play in hazardous materials management?
Safety data sheets are a central database for hazardous substance management. They contain information on classification, labeling, protective measures, storage, and other safety-related details. With SDBcheck®, data from supplier safety data sheets can be extracted, verified, and made available for further processing in GeSi.
Are supplier safety data sheets read in automatically?
Yes, you can use the SDBcheck® online tool to upload your suppliers’ safety data sheets for a plausibility check. The tool automatically parses the data and transfers it to GeSi³ or GeSi4 via an interface.
Can GeSi automatically generate operating instructions?
Yes. GeSi supports the creation of operating instructions based on existing hazardous substance data or MSDS data. The automatically generated operating instructions can then be reviewed and modified. In GeSi4, a further enhancement is planned that will enable the creation of activity-specific operating instructions based on the risk assessment.
How is information made available to employees?
GeSi enables the targeted provision of relevant hazardous substance information, safety data sheets, and operating instructions. Depending on the solution, this is done via intranet portals or cloud-based hazardous substance portals, allowing employees to view the information relevant to their area.
Does GeSi support REACH-compliant and legally compliant work?
GeSi helps you implement relevant hazardous substance management requirements in a structured manner. This includes verified MSDS data, a traceable hazardous substance inventory, documented risk assessments, and up-to-date operating instructions. This enables you to establish a solid foundation for REACH-compliant and legally compliant operations.
What is the difference between GeSi³ GefStoff-Profi and GeSi4 GefStoff-Profi?
GeSi³ GefStoff-Profi is the proven expert solution with a comprehensive range of features. GeSi4 GefStoff-Profi is the new browser-based generation currently in Early Access—technically sound, developed from the ground up, and shaped by the experience gained from GeSi³. Both solutions support professional hazardous substance management, but differ in their range of features, technical foundation, and entry point.
When is GeSi³ GefStoff-Profi the right solution?
GeSi³ is particularly well-suited if you want to start working right away with a comprehensive and well-established set of features. This is especially true for complex requirements, existing GeSi³ structures, or when SDB-Profi or FaSi-Profi are also required.
When is GeSi4 GefStoff-Profi the right solution?
GeSi4 is particularly appealing to companies that are new to digital hazardous materials management, want to use a browser-based solution, and wish to actively participate in the Early Access program. The range of features continues to expand step by step. Early Access partners benefit from opportunities to help shape the product and receive priority support.
Which solution is a better fit for my business?
That depends on your current situation. If you need a very comprehensive set of features right away or require additional GeSi³ product lines, GeSi³ is often the better choice. If you’re just getting started, want to work in a browser-based environment, and would like to participate in the Early Access program, GeSi4 may be the right solution for you. During a consultation, we’ll work with you to determine which solution best meets your needs.
What our customers say
More than 800 customers from a variety of industries rely on GeSi. These customer testimonials provide insight into how our solutions support them in their day-to-day work.
Plastics processing
Agricultural machinery construction
Industry
Public Service
Beverage manufacturer
Medicine
Get Started with Hazardous Substance Management Using GeSi
Whether you’re just getting started, looking to replace existing processes, or want to further develop your hazardous materials management system: We’ll work with you to determine the best way to get started with GefStoff-Profi.