EN ISO 24443:2021/A1:2026

Cosmetics - Determination of sunscreen UVA photoprotection in vitro - Amendment 1 (ISO 24443:2021/Amd 1:2026)

Kosmetische Mittel - In-vitro-Bestimmung des UVA-Schutzes von Sonnenschutzmitteln - Änderung 1 (ISO 24443:2021/Amd 1:2026)

Cosmétiques - Détermination in vitro de la photoprotection des produits de protection solaire aux UVA - Amendement 1 (ISO 24443:2021/Amd 1:2026)

Kozmetika - Določanje zaščitnega faktorja UVA in vitro - Dopolnilo A1 (ISO 24443:2021/Amd 1:2026)

General Information

• Status: Published
• Publication Date: 24-Feb-2026
• ICS: 11.100.10 - In vitro diagnostic test systems
• ICS: 71.100.70 - Cosmetics. Toiletries
• Technical Committee: CEN/TC 392 - Cosmetics
• Drafting Committee: CEN/TC 392 - Cosmetics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 25-Feb-2026
• Completion Date: 25-Feb-2026
• Ref Project: SIST EN ISO 24443:2022/A1:2026 - Cosmetics - Determination of sunscreen UVA photoprotection in vitro - Amendment 1 (ISO 24443:2021/Amd 1:2026)

Relations

• Consolidated By: ISO 24443:2021/Amd 1:2026 - Cosmetics — Determination of sunscreen UVA photoprotection in vitro — Amendment 1
• Effective Date: 12-Feb-2026
• Amends: EN ISO 24443:2021 - Cosmetics - Determination of sunscreen UVA photoprotection in vitro (ISO 24443:2021, Corrected version 2022-02)
• Effective Date: 25-Dec-2024

Overview

EN ISO 24443:2021/A1:2026 is the European standard amendment detailing in vitro methods for determining the UVA photoprotection provided by sunscreen products. Published by CEN and prepared in collaboration with ISO Technical Committees, this amendment modifies the original EN ISO 24443:2021 standard by updating test protocols, robotic specifications, and sample handling procedures for improved accuracy and repeatability in sunscreen product evaluation.

Ensuring reliable UVA photoprotection assessment is crucial for manufacturers, regulatory bodies, and laboratories in the cosmetics industry. With consumer and regulatory focus intensifying around sun protection, harmonized and precise methods such as those described in this standard support product safety, innovation, and global market compliance.

Key Topics

• Standardized In Vitro Method: Specifies updated procedures for measuring sunscreen UVA protection using PMMA (polymethyl methacrylate) plates, ensuring consistent laboratory practices.
• Sample Preparation and Handling: Details protocols for product storage, application temperature, and plate cleaning to minimize variability and maximize reproducibility.
• Manual and Automated Spreading: Introduces meticulous procedures for both human fingertip and robotic application of sunscreen, enhancing method flexibility and precision.
• Robotic Appliance Requirements: Defines technical specifications for robotic systems, including positional repeatability, force application, and the use of a silicon-based finger tool, which fosters automation in sunscreen testing.
• Plate Surface Requirements: Provides updated roughness values and specifications for sandblasted PMMA plates to standardize test surfaces across laboratories.
• Drying and Testing Conditions: Clarifies drying time, environmental controls, and UV exposure conditions to align experimental parameters, ensuring reliable UVA absorbance readings.

Applications

• Cosmetic Product Development: Laboratories and R&D teams use this standard to consistently evaluate UVA photoprotection, informing product formulation and differentiation.
• Quality Control: Manufacturing sites rely on these methods to confirm batch-to-batch uniformity in sunscreen efficacy, contributing to product integrity and consumer safety.
• Regulatory Compliance: Adherence to EN ISO 24443:2021/A1:2026 assures conformance with European and international regulatory requirements for sun protection cosmetics.
• Third-Party Testing & Certification: Testing labs use these protocols to provide trusted, reproducible results needed for market access, certification, and product labeling.
• Innovation in Testing Automation: The inclusion of robotic spreading protocols supports the adoption of laboratory automation, reducing human error and increasing throughput in high-volume testing environments.

Related Standards

• EN ISO 24443:2021: Original standard for in vitro determination of sunscreen UVA photoprotection, forming the foundation for this amendment.
• ISO 24442: In vitro test methods for evaluating UVB protection in sunscreens, complementary to UVA testing requirements.
• ISO/TC 217 and CEN/TC 392 standards: Broader standards for cosmetics safety, efficacy, and testing adopted across international markets.

Compliance with these harmonized laboratory test methods supports the safety and efficacy claims of sunscreen products and facilitates successful navigation of evolving cosmetic regulations. By implementing EN ISO 24443:2021/A1:2026, stakeholders in the cosmetics industry demonstrate commitment to scientific rigor and consumer protection in the evaluation of UVA photoprotection.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2026
Kozmetika - Določanje zaščitnega faktorja UVA in vitro - Dopolnilo A1 (ISO
24443:2021/Amd 1:2026)
Cosmetics - Determination of sunscreen UVA photoprotection in vitro - Amendment 1
(ISO 24443:2021/Amd 1:2026)
Kosmetische Mittel - In-vitro-Bestimmung des UVA-Schutzes von Sonnenschutzmitteln -
Änderung 1 (ISO 24443:2021/Amd 1:2026)
Cosmétiques - Détermination in vitro de la photoprotection des produits de protection
solaire aux UVA - Amendement 1 (ISO 24443:2021/Amd 1:2026)
Ta slovenski standard je istoveten z: EN ISO 24443:2021/A1:2026
ICS:
71.100.70 Kozmetika. Toaletni Cosmetics. Toiletries
pripomočki
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 24443:2021/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2026
EUROPÄISCHE NORM
ICS 71.100.70; 11.100.10
English Version
Cosmetics - Determination of sunscreen UVA
photoprotection in vitro - Amendment 1 (ISO
24443:2021/Amd 1:2026)
Cosmétiques - Détermination in vitro de la Kosmetische Mittel - In-vitro-Bestimmung des UVA-
photoprotection des produits de protection solaire aux Schutzes von Sonnenschutzmitteln - Änderung 1 (ISO
UVA - Amendement 1 (ISO 24443:2021/Amd 1:2026) 24443:2021/Amd 1:2026)
This amendment A1 modifies the European Standard EN ISO 24443:2021; it was approved by CEN on 16 February 2026.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 24443:2021/A1:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 24443:2021/A1:2026) has been prepared by Technical Committee ISO/TC 217
"Cosmetics" in collaboration with Technical Committee CEN/TC 392 “Cosmetics” the secretariat of
which is held by AFNOR.
This Amendment to the European Standard EN ISO 24443:2021 shall be given the status of a national
standard, either by publication of an identical text or by endorsement, at the latest by August 2026, and
conflicting national standards shall be withdrawn at the latest by August 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 24443:2021/Amd 1:2026 has been approved by CEN as EN ISO 24443:2021/A1:2026
without any modification.
International
Standard
ISO 24443
Second edition
Cosmetics — Determination of
2021-12
sunscreen UVA photoprotection in
vitro
AMENDMENT 1
2026-02
AMENDMENT 1
Cosmétiques — Détermination in vitro de la photoprotection des
produits de protection solaire aux UVA
AMENDEMENT 1
Reference number
ISO 24443:2021/Amd.1:2026(en) © ISO 2026

ISO 24443:2021/Amd.1:2026(en)
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 24443:2021/Amd.1:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 217 Cosmetics, in collaboration with the
European Committee for Standardization (CEN) Technical Committee CEN/TC 392, Cosmetics, in accordance
with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iii
ISO 24443:2021/Amd.1:2026(en)
Cosmetics — Determination of sunscreen UVA
photoprotection in vitro
AMENDMENT 1
5.6
Add the following text at the end of the subclause:
The product should be stored, in the dark, between (27 ±2) °C and (32 ±2) °C for at least twelve hours
before the start of the test.
The surface of sandblasted plates should be cleaned with a dry, antistatic microfibre cloth.
The plates should be handled carefully by holding them by the edges, a
...