By Deepa ShettyPublished: 2 min read

Table of Contents

TSCA vs REACH: Key Differences for US and EU Chemical Compliance

If you sell into both the United States and the European Union, you're managing two separate chemical regulation regimes at once: TSCA in the US and REACH in the EU. Compliance with one doesn't cover the other. They differ in what gets listed, how substances move through the system, and what you have to prove. Here's what actually differs, and where a single compliance workflow can genuinely cover both.

What TSCA and REACH Have in Common

Both regulate chemical substances that pose risks to human health and the environment, and both require companies manufacturing, importing, or selling into their respective markets to disclose regulated substances and meet defined safety standards. Non-compliance with either carries real consequences, fines, enforcement action, and in serious cases, restricted market access.

That's roughly where the similarity ends. The mechanics diverge sharply.

How the Two Frameworks Actually Differ

A common misconception is that TSCA is a simple binary: a substance is either approved or banned, with nothing in between. That's not accurate. TSCA runs its own phased process for existing chemicals:

  1. Prioritization: EPA screens a chemical against statutory risk factors (hazard and exposure potential, persistence, bioaccumulation, exposure of vulnerable subpopulations, production volume) and designates it as either high-priority or low-priority for further review.
  2. Risk evaluation: a high-priority designation triggers a multi-year risk evaluation, generally completed within 3 to 3.5 years, assessing whether the substance presents unreasonable risk under its actual conditions of use.
  3. Section 6 risk management: only if the risk evaluation finds unreasonable risk does EPA issue a rule restricting or managing that use, which can include outright bans, but often means conditions, phase-outs, or use-specific limits rather than a flat prohibition.

New chemicals go through a separate track: a Premanufacture Notice (PMN) review, or, where relevant, review of a Significant New Use.

REACH, by contrast, organises substances into three distinct lists based on regulatory status:

So both systems are tiered, they just group substances differently: TSCA by stage of a linear evaluation-to-rulemaking pipeline, REACH by category of regulatory status across three parallel lists. A company operating in both markets has to track two genuinely different data models, not just two versions of the same list.

Registering New Substances Under Each Framework

Under TSCA, a new chemical substance, or an existing substance put to a Significant New Use, requires a Premanufacture Notice submitted to the EPA before manufacture or import can proceed. EPA reviews the PMN and can restrict, condition, or, in some cases, prohibit the activity before it starts.

Under REACH, manufacturers or importers handling a substance at 1 tonne per year or more generally must register it with ECHA, providing hazard and use data proportional to volume. Suppliers also carry an obligation to disclose regulated substances to downstream customers, so the registration duty doesn't stop at the point of import.

Staying Current: How Each Regime Evolves

Both regimes are actively moving targets, not static lists you check once:

  • TSCA: EPA runs prioritization on a rolling basis, generally initiating review of at least five new substances a year to keep the risk evaluation pipeline populated. 2026 has been an active year for TSCA rulemaking, with EPA's Unified Agenda including new Section 6 actions and revisions to existing health and safety reporting rules. Worth noting separately: TSCA Section 8(a)(7) PFAS reporting now extends to finished articles, not just raw chemicals, which catches many manufacturers who assumed PFAS reporting didn't apply to their finished goods.
  • REACH: the Candidate List updates roughly twice a year, and the Community Rolling Action Plan (CORAP) is refreshed annually to flag substances for deeper Member State evaluation.

A practical standard many companies use to keep supply chain data organised across both regimes is IEC 63000, which structures how materials data is collected and documented regardless of which regulation ultimately applies to a given substance.

Software Comparison: Managing TSCA and REACH Together

Most compliance teams end up choosing between three approaches:

Approach

What it looks like

Where it breaks down

Manual, regulation-by-regulation

Separate spreadsheets or trackers for TSCA and REACH, maintained by different people or teams

Data duplication, inconsistent substance records between the two, and no single source of truth when a substance appears on both a TSCA priority list and REACH's Candidate List

Single-regulation point tools

A tool built specifically for one regime (TSCA reporting software, or a REACH-only SVHC screener)

Works well for that one regime, but still requires manually reconciling overlapping substance data if you're subject to both

Unified substance-data platform

One BOM and supplier-data layer, screened against multiple regulatory lists simultaneously

Requires more setup up front, but avoids re-collecting the same supplier declaration twice for two different regulations

Regilient's platform takes the third approach: your bill of materials and supplier declarations are captured once and screened against TSCA's prioritization and reporting requirements, REACH's Candidate List, Authorisation List, and Restriction List, and other regimes like RoHS and PFAS, from the same underlying data model. If you're specifically evaluating TSCA tooling, our TSCA compliance software page covers EPA TSCA inventory updates and Section 6(h) PBT substance management in more depth. For REACH specifically, see our REACH compliance software page. And if TSCA itself is new territory for your team, our TSCA fundamentals guide is a good starting point on Sections 6 and 8 obligations.

Frequently Asked Questions

Is TSCA compliance the same as REACH compliance? No. Meeting TSCA requirements doesn't automatically satisfy REACH obligations, and vice versa. They regulate similar risks through structurally different mechanisms, with different substance lists, registration thresholds, and enforcement bodies.

Does TSCA have an equivalent to REACH's SVHC Candidate List? Not exactly. TSCA's closest equivalent is its prioritization process, where EPA designates chemicals as high-priority for risk evaluation. Unlike REACH's Candidate List, a TSCA high-priority designation isn't itself a finding of risk, and it doesn't trigger the same immediate disclosure duties that an SVHC listing does under REACH Article 33.

What's the registration threshold under REACH? Substances manufactured or imported at 1 tonne per year or more generally require registration with ECHA, unless a specific exemption applies.

How long does a TSCA risk evaluation take? EPA is generally required to complete a final risk evaluation within 3 to 3.5 years of designating a substance as high-priority.

What are the penalties for TSCA non-compliance? Violations can carry penalties of up to $50,000 per violation per day, with potential imprisonment for serious offences.

How often does the REACH Candidate List update? Typically twice a year, though the exact timing and number of additions varies with each update.

Can one compliance platform handle both TSCA and REACH? Yes, provided the platform captures supply chain and substance data once and screens it against multiple regulatory lists, rather than requiring separate data collection for each regime.

Manage TSCA and REACH From One Platform

Regilient automates supply chain data collection, screens your BOM against TSCA, REACH, and other regulatory frameworks simultaneously, and keeps your documentation aligned as both regimes evolve.

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TSCA vs. REACH: Key Compliance Insights for U.S. and EU Markets

What’s the difference between TSCA in the U.S. and REACH in the EU?
TSCA , managed by the U.S. EPA, uses a single inventory system, chemicals are either allowed or banned. REACH , managed by ECHA in the EU, uses a tiered system ( Candidate List , Authorization List, Restrictions List) with phased restrictions.
Which chemicals are regulated under TSCA versus REACH?
TSCA covers existing and new chemicals listed on the EPA’s TSCA Inventory (~82,000+) , and requires pre‑notification (PMN) for new chemicals. REACH mandates registration for all substances produced/imported in the EU at 1 t/year or more, expanding to detailed dossiers at higher tonnages.
Do TSCA and REACH require the same safety testing?
Not exactly. REACH enforces mandatory risk assessments and data submission , including chemical safety reports for ≥10 t/year. TSCA relies on EPA-mandated tests or voluntary data submissions , especially under its Section 8(d) rule.
Can a chemical approved under TSCA be used in the EU?
No. Approval in one jurisdiction doesn’t guarantee another . A substance legal under TSCA must still be registered under EU REACH to be used in Europe, and vice versa.
How do TSCA and REACH handle public disclosure of chemical data?
TSCA allows companies to protect confidential business information (CBI) , often hiding volume, identity, and use . REACH emphasizes public transparency , requiring safety data, SVHC listings, and registered volumes to be accessible
Which agency updates chemical restrictions in TSCA and REACH?
In the U.S., the EPA conducts rolling prioritization and enforces Section 6 bans/restrictions . In the EU, ECHA and the European Commission update REACH via processes like CORAP, candidate and authorization lists, and restrictions
How do TSCA and REACH define ‘new chemicals’?
TSCA considers unlisted chemicals as “new” and requires a Premanufacture Notice (PMN) 90 days before manufacture. In REACH, any substance in the EU not registered at ≥1 t/year must be registered before first placing on the market.
Is TSCA compliance the same as REACH compliance?
No. Meeting TSCA requirements doesn't automatically satisfy REACH obligations, and vice versa. They regulate similar risks through structurally different mechanisms, with different substance lists, registration thresholds, and enforcement bodies.
Does TSCA have an equivalent to REACH's SVHC Candidate List?
Not exactly. TSCA's closest equivalent is its prioritization process, where EPA designates chemicals as high-priority for risk evaluation. Unlike REACH's Candidate List, a TSCA high-priority designation isn't itself a finding of risk, and it doesn't trigger the same immediate disclosure duties that an SVHC listing does under REACH Article 33.
What's the registration threshold under REACH?
Substances manufactured or imported at 1 tonne per year or more generally require registration with ECHA, unless a specific exemption applies.
How long does a TSCA risk evaluation take?
EPA is generally required to complete a final risk evaluation within 3 to 3.5 years of designating a substance as high-priority.
What are the penalties for TSCA non-compliance?
Violations can carry penalties of up to $50,000 per violation per day, with potential imprisonment for serious offences.
How often does the REACH Candidate List update?
Typically twice a year, though the exact timing and number of additions varies with each update.
Can one compliance platform handle both TSCA and REACH?
Yes, provided the platform captures supply chain and substance data once and screens it against multiple regulatory lists, rather than requiring separate data collection for each regime.