Compliance considerations, regulatory frameworks, and third-party verification.

Ceramic products are widely used in both consumer and commercial applications—from plates and mugs to tile surfaces installed in homes, hospitals, restaurants, and commercial buildings. These materials are valued for durability, chemical stability, and long service life.

In certain applications, however, regulatory standards require verification that ceramic products do not release trace amounts of regulated metals under specific conditions. That verification process is known as leachability (or extraction) testing.

Understanding when testing applies, which standards are relevant, and why independent testing matters is becoming increasingly important for manufacturers, importers, and specifiers.

What Is Leachability Testing?

Leachability testing evaluates whether potentially hazardous substances, most commonly lead and cadmium, can be released from a ceramic product when in contact with liquids, cleaning solutions, or environmental moisture.

Ceramic materials are engineered for durability and long-term performance. However, some glazes, pigments, and decorative finishes may contain trace metals as part of their formulation. Regulatory agencies therefore require standardized extraction testing to confirm that any potential migration remains below established safety thresholds.

Independent, third-party testing provides objective verification—something regulators, certifying bodies, and customers increasingly expect.

Ceramicware: Why Food-Contact Testing Is Required

Ceramicware intended for food or beverage use, including plates, bowls, mugs, pitchers, and cups, is subject to strict regulatory oversight because of direct and repeated contact with food. IPA Laboratories offers dedicated tableware testing services to help manufacturers and importers meet applicable requirements.

While properly formulated and fired glazes are designed to be stable, testing confirms that products meet established migration limits when exposed to acidic foods or beverages.

United States Requirements

In the U.S., ceramicware is regulated by the Food and Drug Administration (FDA) under Food Code 2022. Testing commonly performed under ASTM C738, which measures the release of lead and cadmium using a mild acetic acid solution designed to simulate food contact. Allowable limits may vary by product types (for example, flatware versus hollowware). Manufacturers must also consider California Proposition 65, which establishes specific  exposure thresholds and may require warning labels if products exceed those limits.

European Union Requirements

In the European Union, ceramicware is governed by Regulation (EC) No. 1935/2004 and Directive 84/500/EEC. These regulations establish specific migration limits for lead and cadmium, with testing performed using EN-based methods.

For food-contact ceramic products, compliance testing is mandatory for market access.

Ceramic Tile: When is Leachability Testing Relevant?

Ceramic tiles are not food-contact products, and in most standard applications, do not present a consumer exposure pathway comparable to ceramicware.

However, testing may still be appropriate or required depending on:

  • Installation in sensitive environments such as healthcare facilities or schools
  • Participation in sustainability or green building certification programs
  • Marketing claims related to environmental or human health performance
  • Specific regulatory or project-based requirements related to hazardous substances

In these contexts, extraction testing provides documentation that products meet applicable criteria.

Common Tile Leachability Standards

For manufacturers pursuing Green Squared® certification, ANSI A138.1 includes provisions addressing heavy metal content and leachability, along with broader environmental and human health criteria. Testing is commonly conducted using ASTM C895, which measures lead and cadmium release under controlled extraction conditions.

In international markets, ceramic tile may also be evaluated using ISO or EN standards, such as ISO 10545-15, depending on regulatory or program requirements.

Why Third-Party Testing Matters

Leachability testing should be performed by an ISO/IEC 17025-accredited laboratory with demonstrated experience in ceramic materials.

Third-party testing supports:

  • Regulatory compliance
  • Certification eligibility
  • Risk management
  • Defensible documentation

Representative sampling, appropriate method selection, and clear reporting are essential components of a compliant testing program.

International Product Assurance Laboratories performs leachability and extraction testing in accordance with applicable ASTM, ISO, EN, and regulatory methods, providing manufacturers and importers with reliable data to support compliance and market access. To learn more about available leachability and extraction testing services, visit our testing overview page to explore supported methods and compliance solutions.