Railway substance compliance is now a supply-chain data challenge

Railway products often have long lifecycles, complex bills of materials and multi-tier supplier networks. A train system, electrical unit, cable, coating, seat component, adhesive, seal, fastener or spare part may contain materials sourced from several suppliers across different markets.

That is why railway substance compliance is no longer just about collecting a one-page supplier statement. Customers increasingly expect structured, traceable and up-to-date evidence showing whether products contain prohibited or declarable substances.

For the railway sector, this usually means managing the Rail Industry Substance List (RISL), the UNIFE Material and Substance Declaration Template (MSDT), and regulatory requirements such as REACH, SCIP, RoHS, POPs, CLP and emerging PFAS restrictions.

UNIFE describes RISL as a railway-specific list of prohibited and declarable chemicals used in the rail industry, designed to help suppliers and sub-suppliers understand substances restricted by European and international legislation. UNIFE also states that RISL is regularly updated, with reviews occurring once a year.

1. UNIFE lists a current RISL package dated 18 June 2026

UNIFE’s RISL page currently lists a current version dated 18 June 2026, including the 2026-06 Rail Industry Substance List Guidelines, the 2026-05-20 Global Substances List Simplified, and the 2026-05-20 Rail Industry Substance List.

This is important because railway suppliers should not rely on outdated substance screenings or old declarations without checking whether the latest RISL version affects their products. When RISL changes, companies may need to re-check parts, materials, suppliers and existing declarations.

What is a Railway Substance Compliance Service?

A Railway Substance Compliance Service helps companies identify, collect, assess, manage and maintain substance information for railway products and components.

In practical terms, it supports companies with:

The value of the service is not only regulatory interpretation. It is the ability to turn supplier data into reliable compliance evidence that can be used for customer requests, tenders, audits and internal risk decisions.

Who needs a Railway Substance Compliance Service?

This service is especially relevant for companies that manufacture, supply, import or distribute railway products, components or materials.

It is useful for:

• Rolling stock manufacturers
• Railway system integrators
• Component and spare-part suppliers
• Cable and wiring suppliers
• Electronics and control-unit suppliers
• Coating, adhesive, sealant and surface-treatment suppliers
• Interior, seating, textile, elastomer and plastic-part suppliers
• Importers and distributors of railway components
• Compliance, quality, procurement, engineering and sustainability teams

A company may need this service when a railway customer requests RISL/MSDT declarations, updated substance evidence, REACH SVHC information, SCIP data, RoHS declarations or proof that restricted substances are controlled across the supply chain.

Latest railway substance compliance updates to watch

What railway suppliers should do now

2. RISL requires version control and historical traceability

UNIFE states that RISL is reviewed once a year and that historical versions are available to help users identify changes and trace modifications.

For railway suppliers, this means compliance records should show:

• Which RISL version was used
• When the assessment was completed
• Which products or materials were reviewed
• Which substances were identified as prohibited or declarable
• Whether customer declarations need to be updated

This is especially important for long-term rail projects where parts may remain in production, maintenance or spare-part supply for many years.

3. MSDT remains the key railway substance declaration format

UNIFE explains that the Material and Substance Declaration Template is intended to harmonise information requested by leading system integrators into a common format recognised across the industry. UNIFE also states that suppliers are urged to use MSDT as the official format for reporting the substance composition of their products.

For suppliers, this means generic compliance letters may not be enough. Customers may expect structured substance data that can be reviewed, compared and maintained over time.

4. REACH SVHC obligations continue to expand

ECHA announced in February 2026 that two hazardous chemicals were added to the REACH Candidate List, bringing the list to 253 entries. ECHA also reminded companies that they are responsible for managing the risks of these substances and providing customers and consumers with safe-use information where required.

For railway suppliers, this matters because articles containing Candidate List substances above the relevant threshold may trigger customer communication duties, SCIP-related obligations and additional evidence requests.

5. SCIP remains important for railway articles and complex objects

The SCIP database is designed to ensure that information on articles containing Candidate List substances is available throughout the lifecycle of products and materials, including at the waste stage.

Railway products are often complex objects made of many articles. If substance information is not available at part level, it can be difficult to prepare complete SCIP data for assemblies, modules or systems placed on the EU market.

6. PFAS is becoming a major substance-compliance risk area

In March 2026, ECHA reported that its Risk Assessment Committee and Socio-Economic Analysis Committee support an EU-wide PFAS restriction, subject to specific derogations.

PFAS can be relevant to railway supply chains because these substances may be used in high-performance materials, coatings, seals, gaskets, cables, lubricants, membranes, electronics and technical textiles. Even before final restrictions are fully applied, railway companies should start identifying where PFAS may be present and whether alternatives, derogations or technical justifications may be needed.

7. Enforcement attention on restricted substances is increasing

ECHA announced in June 2026 that inspectors will check whether products or mixtures placed on the market comply with restrictions under EU chemicals legislation, including whether restricted hazardous substances are below permitted limits.

This reinforces the need for railway suppliers to keep reliable evidence, not just supplier statements. Companies should be able to show how compliance was assessed, which substances were checked, which suppliers provided evidence and whether product changes were reviewed.

8. CLP changes affect substances and mixtures used in railway supply chains

ECHA explains that certain amended CLP provisions apply from 1 July 2026, with a transitional period until 1 July 2028. Other labelling-related provisions apply from 1 January 2027, with a transitional period until 1 January 2029.

This can affect railway suppliers using or supplying paints, adhesives, sealants, coatings, cleaning agents, lubricants, resins and other chemical mixtures. SDS, classification and labelling evidence may need to be reviewed as suppliers update their documentation.

9. RoHS remains relevant for electrical and electronic railway components

The European Commission explains that RoHS exemptions are limited in time and reassessed regularly based on factors such as the availability of substitutes, environmental and health impacts, socioeconomic impact and innovation.

This is relevant for railway electronics, lighting, control systems, sensors, communication equipment and electrical assemblies where RoHS compliance or exemption evidence may be required by law or by customer specification.

10. POPs restrictions should not be ignored

ECHA states that the EU POPs Regulation bans or severely restricts the production and use of persistent organic pollutants in the European Union.

For railway suppliers, POPs may be relevant when reviewing flame retardants, plastic additives, coatings, textiles, elastomers, legacy materials and spare parts.

What railway suppliers usually need to prove

A railway customer, system integrator or auditor may ask for evidence showing that substance compliance is controlled at product level.

Typical questions include:

1- Which RISL version was used for the assessment?

2- Is the part or material covered by an MSDT declaration?

3- Are any RISL prohibited substances present?

4- Are any RISL declarable substances present?

5- Does the product contain REACH SVHCs above 0.1% w/w?

6- Is Article 33 communication required?

7- Is SCIP reporting required for articles placed on the EU market?

8- Is RoHS applicable to the electrical or electronic component?

9- Are RoHS exemptions used, and are they still valid?

10- Are POPs, PFAS or other restricted substances relevant?

11- Are SDS documents available for mixtures?

12- Is supplier evidence linked to part number, revision and project?

13- Is there a process to update declarations when regulations change?

This is why railway substance compliance should be managed as a structured data process rather than a static document collection exercise.

Product areas most affected by railway substance compliance

Documents usually required for railway substance compliance

Railway suppliers should be ready to collect and maintain:

• RISL compliance declarations
• MSDT supplier declarations
• Full material declarations where available
• REACH SVHC declarations
• SCIP data or SCIP numbers where applicable
• RoHS declarations of conformity
• RoHS exemption evidence where relevant
• Safety Data Sheets for substances and mixtures
• POPs assessment records
• PFAS presence or absence declarations
• Laboratory test reports where required
• Supplier compliance certificates
• BOM-level compliance status reports
• Product revision and change-control records
• Customer-specific substance declaration forms

The stronger the evidence file, the easier it becomes to respond to tenders, customer requests, audits and regulatory changes.

Step 1: Define product and market scope

Start by identifying which products, components, spare parts and materials are supplied to railway customers and which markets they are placed on.

This matters because the compliance requirements may differ depending on the customer, application, country, product type and whether the item is a substance, mixture, article or complex object.

Step 2: Build a substance-ready BOM

A standard BOM may show part numbers and suppliers, but it may not show material composition, substance risk, declaration status or regulatory relevance.

A substance-ready BOM should connect:

• Part number
• Product family
• Supplier
• Material type
• Declaration status
• RISL status
• REACH SVHC status
• SCIP relevance
• RoHS applicability
• Supporting evidence

Step 3: Collect updated supplier declarations

Request supplier data using MSDT or another customer-accepted format. Declarations should be connected to the correct part number, drawing, revision and product scope.

Avoid accepting declarations that are too generic, outdated or not linked to a specific product.

Step 4: Screen against the latest RISL

Use the latest applicable RISL version and document the version used. Since UNIFE lists a current 2026 RISL package, suppliers should check whether older assessments need to be updated.

Step 5: Check REACH SVHC and SCIP relevance

Identify whether Candidate List substances are present above 0.1% w/w in any article. If the product is placed on the EU market and SCIP requirements apply, prepare the required article-level data.

Step 6: Review RoHS, POPs, PFAS and CLP requirements

Do not treat RISL as the only requirement. Railway suppliers may also need to review electrical components under RoHS, persistent pollutants under POPs, possible PFAS use, and SDS/classification changes under CLP.

Step 7: Create audit-ready evidence packs

A strong evidence pack should allow the company to answer customer or auditor questions quickly. It should include declarations, supporting documents, assessment results, version history and supplier follow-up records.

Step 8: Keep compliance updated

Railway substance compliance must remain active. Products should be reviewed when:

• RISL changes
• The REACH Candidate List changes
• A supplier changes formulation
• A product revision changes
• A customer updates its requirements
• RoHS exemptions change
• PFAS or POPs restrictions evolve
• New test reports or SDS documents are issued

Common mistakes to avoid

Mistake 1: Using outdated RISL declarations

A declaration based on an old RISL version may not reflect the current railway substance list. Suppliers should track RISL version history and reassess affected products when needed.

Mistake 2: Treating supplier letters as full evidence

A short supplier letter saying “compliant” may not be enough if it does not identify the product, substance scope, regulation, threshold, date, revision and supporting evidence.

Mistake 3: Managing compliance outside the BOM

If compliance data is not connected to the BOM, it becomes difficult to identify which component creates a risk, which supplier must be contacted and which customer projects may be affected.

Mistake 4: Ignoring SCIP until the end of the project

SCIP data often requires article-level information. Waiting until the final stage can create delays if lower-tier supplier data is missing.

Mistake 5: Waiting too long on PFAS mapping

PFAS may be difficult to identify because suppliers may not always disclose detailed material chemistry. Early supplier engagement can reduce the risk of late redesign or customer delays.

Mistake 6: Not controlling evidence validity

Declarations, SDS documents, test reports and exemptions should be reviewed periodically. A document may exist, but it may no longer be current.

FAQ: Railway Substance Compliance Service

Is RISL a law?

RISL itself is not a regulation. It is an industry substance list used in the railway sector to help suppliers manage prohibited and declarable substances linked to legal and customer requirements. UNIFE describes RISL as a railway-specific list of prohibited and declarable chemicals used by the rail industry.

Is MSDT mandatory?

MSDT is not a law by itself. However, UNIFE describes it as a harmonised template recognised by system integrators, and its Chemical Risks Topical Group urges suppliers to use it as the official format for reporting substance composition.

Is railway substance compliance only about REACH?

No. REACH is important, but railway substance compliance can also involve RISL, MSDT, SCIP, RoHS, POPs, CLP, PFAS and customer-specific restricted substance requirements.

When should railway suppliers update substance declarations?

Suppliers should update declarations when RISL changes, the REACH Candidate List changes, a material formulation changes, a supplier changes, a product revision changes, or a customer requests updated evidence.

What is the biggest challenge for railway suppliers?

The biggest challenge is usually not one single regulation. It is collecting accurate supplier data, connecting it to the BOM, checking it against multiple substance requirements and keeping the evidence current throughout long railway product lifecycles.

How ComplyMarket product compliance software can help

Railway substance compliance requires structured supplier data, current substance lists, product-level traceability and audit-ready evidence. Managing this manually through spreadsheets and email can create delays, data gaps and version-control problems.

ComplyMarket provides product and material compliance software designed to help companies manage regulations, documentation, supplier compliance and Digital Product Passport requirements in one portal. Its product compliance management software is positioned as a centralized platform for manufacturers, importers and product managers managing regulatory obligations.

For railway substance compliance, ComplyMarket can support companies by helping them:

• Centralize supplier declarations and supporting documents
• Manage RISL, REACH, SCIP, RoHS, POPs and PFAS-related evidence
• Connect substance compliance data to parts, suppliers, materials and product revisions
• Track declaration status and supplier follow-ups
• Identify missing or outdated evidence
• Prepare customer-ready compliance reports
• Maintain audit-ready documentation
• Reduce manual spreadsheet work
• Improve visibility across compliance, procurement, engineering and quality teams

ComplyMarket’s Railway Substance Compliance Service page also describes railway substance requirements as being built on RISL, MSDT and applicable regulations such as EU REACH, SCIP, POPs and RoHS where relevant.