EN ISO 18473-4:2023

Functional pigments and extenders for special applications - Part 4: Nanoscale titanium dioxide for photocatalytic application (ISO 18473-4:2022)

This document specifies requirements and corresponding test methods for nanoscale titanium dioxide (TiO2) in either powder or suspension form for photocatalytic application.
This document is applicable to modified nanoscale titanium dioxide for photocatalytic application.
NOTE       Such modification can be surface treatment, coating, doping and combination thereof.

Funktionelle Pigmente und Füllstoffe für besondere Anwendungen - Teil 4: Titandioxid im Nanomaßstab für photokatalytische Zwecke (ISO 18473-4:2022)

Pigments et matières de charges fonctionnels pour applications spéciales - Partie 4: Dioxyde de titane à l'échelle nanométrique pour des applications photocatalytiques (ISO 18473-4:2022)

Funkcionalni pigmenti in polnila za posebno uporabo - 4. del: Nano titanov dioksid za fotokatalitsko uporabo (ISO 18473-4:2022)

Za dokument določa zahteve in ustrezne preskusne metode za nano titanov dioksid (TiO2) v prahu ali suspenziji za fotokatalitsko uporabo.
Ta dokument se uporablja za modificiran nano titanov dioksid za fotokatalitsko uporabo. To je lahko površinska obdelava, premazovanje, dopiranje ali kombinacija le-teh.

General Information

• Status: Published
• Publication Date: 18-Jul-2023
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: CEN/TC 298 - Pigments and extenders
• Drafting Committee: CEN/TC 298 - Pigments and extenders
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 19-Jul-2023
• Completion Date: 19-Jul-2023
• Ref Project: SIST EN ISO 18473-4:2023 - Functional pigments and extenders for special applications - Part 4: Nanoscale titanium dioxide for photocatalytic application (ISO 18473-4:2022)

Overview

EN ISO 18473-4:2023 (ISO 18473-4:2022) defines requirements and test methods for nanoscale titanium dioxide (TiO2) supplied as powder or suspension for photocatalytic applications. It covers modified nano‑TiO2 (surface treatment, coating, doping or combinations) and establishes classification, designation, sampling, marking and test reporting requirements relevant to manufacturers, suppliers and users of photocatalytic functional pigments.

Key topics and technical requirements

• Scope and forms: Applies to nanoscale TiO2 in powder or suspension form for photocatalytic use; modifications (coatings, doping, surface treatment) are included.
• Classification: Crystal structure is classified as anatase or mainly anatase with low rutile content.
• Designation: Materials can be designated by median primary particle size (d50) and other agreed characteristics.
• Essential requirements (summary of Table 1):
  • Median primary particle size (d50): ≤ 100 nm (reported by TEM; D10, D50, D90 number‑based distribution and TEM image).
  • Specific surface area: ≥ 35 m2/g (BET method, ISO 9277).
  • Residue on 45 µm sieve: < 0.05% (ISO 787-18).
  • Mass fraction of TiO2: ≥ 80% after ignition treatment (ISO 591-1).
  • pH of 4% suspension: 1.5 to 9 with batch deviation < 0.5 (ISO 787-9).
  • Crystal structure reporting by XRD; bulk density reported to buyer (ISO 787-11).
• Conditional/additional powder requirements (subject to agreement): moisture ≤ 15% (ISO 787-2), loss on ignition ≤ 20% (ISO 3262-1), elemental impurity reporting as required.
• Test methods referenced: TEM for particle sizing, XRD for crystal phase, BET (ISO 9277) for surface area, and other ISO methods listed in the normative references.

Applications and users

• Practical applications: Photocatalytic coatings and paints, self‑cleaning and antifogging surfaces, air and water purification, deodorization, antibacterial/antifungal finishes, and green chemistry photocatalysis.
• Who uses this standard:
  • Nano‑TiO2 manufacturers and formulators
  • Paints, coatings and construction‑materials producers
  • Environmental technology and water/air treatment suppliers
  • Quality control and testing laboratories
  • Regulatory bodies and procurement teams specifying photocatalytic materials

Related standards

Relevant referenced documents include:

• ISO 9277 - BET specific surface area
• ISO 591-1 - TiO2 pigments: composition and test methods
• ISO 20814, ISO 22197-1 - photocatalytic activity and air‑purification test methods
• ISO 18451-1 - terminology for pigments and extenders

EN ISO 18473-4:2023 provides a harmonized framework for specifying and testing nano‑TiO2 photocatalysts, helping ensure consistent quality, safety and performance across supply chains for photocatalytic products.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2023
Funkcionalni pigmenti in polnila za posebno uporabo - 4. del: Nano titanov dioksid
za fotokatalitsko uporabo (ISO 18473-4:2022)
Functional pigments and extenders for special applications - Part 4: Nanoscale titanium
dioxide for photocatalytic application (ISO 18473-4:2022)
Funktionelle Pigmente und Füllstoffe für besondere Anwendungen - Teil 4: Titandioxid im
Nanomaßstab für photokatalytische Zwecke (ISO 18473-4:2022)
Pigments et matières de charges fonctionnels pour applications spéciales - Partie 4:
Dioxyde de titane à l'échelle nanométrique pour des applications photocatalytiques (ISO
18473-4:2022)
Ta slovenski standard je istoveten z: EN ISO 18473-4:2023
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 18473-4
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2023
EUROPÄISCHE NORM
ICS 87.060.10
English Version
Functional pigments and extenders for special applications
- Part 4: Nanoscale titanium dioxide for photocatalytic
application (ISO 18473-4:2022)
Pigments et matières de charges fonctionnels pour Funktionelle Pigmente und Füllstoffe für besondere
applications spéciales - Partie 4: Dioxyde de titane à Anwendungen - Teil 4: Titandioxid im Nanomaßstab
l'échelle nanométrique pour des applications für photokatalytische Zwecke (ISO 18473-4:2022)
photocatalytiques (ISO 18473-4:2022)
This European Standard was approved by CEN on 16 July 2023.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a 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 European Standard 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18473-4:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 18473-4:2022 has been prepared by Technical Committee ISO/TC 256 "Pigments,
dyestuffs and extenders” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 18473-4:2023 by Technical Committee CEN/TC 298 “Pigments and extenders” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2024, and conflicting national standards shall
be withdrawn at the latest by January 2024.
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.
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 18473-4:2022 has been approved by CEN as EN ISO 18473-4:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 18473-4
First edition
2022-02
Functional pigments and extenders for
special applications —
Part 4:
Nanoscale titanium dioxide for
photocatalytic application
Reference number
ISO 18473-4:2022(E)
ISO 18473-4:2022(E)
© ISO 2022
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 18473-4:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification and designation . 2
4.1 Classification . 2
4.2 Designation . 2
5 Requirements and test methods . 3
5.1 Appearance . 3
5.2 Technical requirements . 3
6 Sampling . 4
7 Marking and labelling . 4
8 Test report . 4
Bibliography . 5
iii
ISO 18473-4:2022(E)
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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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, t
...