CEN/TS 16766:2015

SLOVENSKI STANDARD
01-junij-2015
Topila biološkega izvora - Zahteve in preskusne metode
Bio-based solvents - Requirements and test methods
Biobasierte Lösemittel - Anforderungen und Prüfverfahren
Solvants biosourcés - Exigences et méthodes d'essais
Ta slovenski standard je istoveten z: CEN/TS 16766:2015
ICS:
87.060.30 Topila Solvents
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN/TS 16766
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
March 2015
ICS 87.060.30
English Version
Bio-based solvents - Requirements and test methods
Solvants biosourcés - Exigences et méthodes d'essais Biobasierte Lösemittel - Anforderungen und Prüfverfahren
This Technical Specification (CEN/TS) was approved by CEN on 25 November 2014 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 16766:2015 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Introduction .4
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 General purpose of solvents .6
5 Performance .7
5.1 Generalities around performance .7
5.2 Technical performance properties .7
6 Health, safety and environmental requirements .9
7 Bio-based content. 10
8 Sustainability . 10
9 Declaration and product labelling . 11
Annex A (normative) Hansen solubility parameters . 12
A.1 Generalities . 12
A.2 Calculation of the Hansen solubility parameters for individual solvents . 13
A.3 Calculation of Hansen solubility parameters for solvent blends . 14
Bibliography . 15

Foreword
This document (CEN/TS 16766:2015) has been prepared by Technical Committee CEN/TC 411 “Bio-based
products”, the secretariat of which is held by NEN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Mandate M/491 [1] given to CEN by the European Commission
and the European Free Trade Association, for the development of European Standards for solvents and
surfactants in relation to bio-based product aspects. It has been prepared by CEN/TC 411/WG 2 “Bio based
solvents”, the secretariat of which is held by the European Solvents Industry Group and NEN.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Introduction
Bio-based products from forestry and agriculture have a long history of application, such as paper, board and
various chemicals and materials. The last decades have seen the emergence of new bio-based products in
the market. Some of the reasons for the increased interest lie in the bio-based products’ benefits in relation to
the depletion of fossil resources and climate change. Bio-based products may also provide additional product
functionalities. This has triggered a wave of innovation with the development of knowledge and technologies
allowing new transformation processes and product development.
Acknowledging the need for common standards for bio-based products, the European Commission issued
1)
mandate M/492 , resulting in a series of standards developed by CEN/TC 411, with a focus on bio-based
products other than food, feed and biomass for energy applications.
The standards of CEN/TC 411 "Bio-based products" provide a common basis on the following aspects:
— Common terminology;
— Bio-based content determination;
— Life Cycle Assessment (LCA);
— Sustainability aspects;
— Declaration tools.
It is important to understand what the term bio-based product covers and how it is being used. The term ‘bio-
based’ means 'derived from biomass' [3]. Bio-based products (bottles, insulation materials, wood and wood
products, paper, solvents, chemical intermediates, composite materials, etc.) are products which are wholly or
partly derived from biomass. It is essential to characterize the amount of biomass contained in the product by
for instance its bio-based content or bio-based carbon content.
The bio-based content of a product does not provide information on its environmental impact or sustainability,
which may be assessed through LCA and sustainability criteria. In addition, transparent and unambiguous
communication within bio-based value chains is facilitated by a harmonized framework for certification and
declaration. This Technical Specification has been developed with the aim to fulfil part of a Mandate [1] to
describe the technical requirements of bio-based solvents in relation to bio-based product aspects.
Solvents are liquids which have the ability to dissolve, suspend or extract other materials. In Europe,
thousands of producers and manufacturers and more than 10 million workers use solvents every day. The
solvent producing industry is composed of both small and medium-sized enterprises as well as multinationals.
Downstream users generally tend to be SMEs and micro-SMEs.
Solvents are mainly produced from fossil feedstock. The amount of fossil feedstock used for solvent
production is however low with less than 1 % of the total world's fossil feedstock consumption (see
www.esig.be).
This document describes the approach that can be taken in describing the technical requirements of bio-
based solvents in relation to bio-based product for the customers using bio-based solvents. This document
examines how to prove the criteria for “bio-based solvents”. The purpose of this document is to define how the
criteria of performance, health, safety and environment can be determined (measured and calculated) for the

1) A Mandate is a standardization task embedded in European trade laws. Mandate M/492 is addressed to the European
Standardization bodies, CEN, CENELEC and ETSI, for the development of horizontal European Standards for bio-based
products.
bio-based solvent placed on the market. This approach intends to strengthen the reputation of “bio-based
solvents” and the confidence of the customer in this product group.
The criteria for "bio-based solvents" published in this Technical Specification are complementary to the other,
horizontal standards by CEN/TC 411.
1 Scope
This Technical Specification sets requirements for bio-based solvents in terms of properties, limits, application
classes and test methods. It lays down the characteristics and details for assessment of bio-based solvents:
— fit for purpose in terms of performance related properties;
— comply with the requirements regarding the health, safety and environment which apply to general
solvents;
— are derived from a certain minimum percentage of biomass; and
— comply with at least similar sustainability criteria as comparable (regular) solvents.
The criteria of the Regulation for Environmental Assessment of Chemicals (REACH) [2] are included in the
discussions that have led to this Technical Specification.
NOTE EN 16575 defines the term “bio-based” as derived from biomass and clarifies that “bio-based” does not imply
“biodegradable”. In addition, “biodegradable” does not necessarily imply the use of “bio-based” material.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
CEN/TS 16640, Bio-based products - Determination of the bio based carbon content of products using the
radiocarbon method
EN 16575:2014, Bio-based products - Vocabulary
prEN 16751:2014, Bio-based products - Sustainability criteria
prEN 16760:2014, Bio-based products - Life Cycle Assessment
EN ISO 12185, Crude petroleum and petroleum products - Determination of density - Oscillating U-tube
method (ISO 12185)
EN ISO 14040, Environmental management - Life cycle assessment - Principles and framework (ISO 14040)
EN ISO 14044, Environmental management - Life cycle assessment - Requirements and guidelines
(ISO 14044)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16575:2014 apply.
4 General purpose of solvents
Solvents are liquids which have the ability to dissolve, suspend or extract other materials. They make it
possible to process, apply, clean or separate materials. Solvents have significantly changed modern living and
are an invaluable solution for industries as diverse as pharmaceuticals and microelectronics to domestic
cleaning and printing. In fact, without solvents, many of the products we use and rely on, from penicillin to
industrial paint, would not perform to the standards we demand today.
Organic solvents are any organic compound which is typically used, alone or in combination with other agents,
and without undergoing a chemical change, to dissolve raw materials, products or waste materials.
Examples of applications for solvents are (as presented in the Solvents Emissions Directive [4]):
— cleaning agent,
— dissolver,
— dispersion medium,
— viscosity adjuster,
— surface tension adjuster,
— plasticiser, or
— preservative.
NOTE For more examples of applications, see the website of the European Solvents Industry Group, www.esig.org.
5 Performance
5.1 Generalities around performance
This section gives a common set of technical properties characterizing the performance of solvents including
bio-based solvents. In absence of international solvent specification standards, it is necessary to provide to
potential users the means to qualify the bio-based solvent products, especially for its technical performance.
There are a number of other factors which will determine the acceptance of a solvent product such as the
Health, Safety and Environmental properties which are treated in another section of this document.
Solvents are used in a wide variety of applications and it is not convenient to evaluate their performance with
respect to each application. Therefore, a practical approach is to define a set of measurable solvent properties
which enable technical specialists to select appropriate solvents and guide their evaluation.
A set of seven properties has been selected which describe essential properties associated with a solvent.
5.2 Technical performance properties
5.2.1 Chemical composition
While chemical composition is not a property in itself, it provides essential information regarding the suitability
of a solvent in process and applications.
Quantitative chemical composition of the product should be provided. To identify substances or mixtures as
relevant, use of the nomenclature as in EU CLP [5] shall be used.
5.2.2 Solvency power
Very different ways have been defined to measure solvency power, generally experimental measurements
such as solubility in water, solubility in oil, Aniline point, Kauri Butanol index, polarity, etc. However, such
methods are not able to describe the full extent of the solubility properties of products exhibiting a wide variety
of polarities.
A well-known quantitative assessment of solvency power has been developed through the means of the
Hansen Solubility parameters [6], which provide a suitable description of solvency properties. Annex A gives a
detailed description on how to determine these solubility parameters.
Other scales may be used to characterize solvency power as for example the Kamlet-Taft parameters, as long
as they are correlated to Hansen Solubility.
Values of the three Hansen solubility parameters shall be given and should be reported to one decimal place
1/2
and in units of MPa .
The source of solubility parameter values shall be reported and whether they are estimated or experimentally
determined.
5.2.3 Distillation characteristics
Numerous methods are available, based upon actual distillation measurements or on correlations, especially
from gas chromatography.
NOTE Some formulations of solvents might not be suitable for actual distillation measurement, for example some
emulsions.
A selection of recommended test methods is listed below:
— EN ISO 3405 [22], which determines distillation characteristics at atmospheric pressure used for
petroleum products of distillation points above 0 °C and end points below approximately 400 °C and is
equivalent to ASTM D86 [7, 8].
— ISO 918 [25], which determines distillation characteristics of organic liquids used for non petroleum
products of boiling points in the range of approximately 30 °C to 300 °C in atmospheric conditions and
which are stable under these conditions.
— ASTM D1078 [29], which is a test for the distillation range of volatile organic liquids used for distillation
range of organic liquids boiling between 30 °C and 350 °C and which are stable during the distillation
process.
— EN 15199-1 [20], describes the determination of boiling range distribution of materials with initial boiling
points (IBP) above 100 °C and final boiling points (FBP) below 750 °C, it is equivalent to ASTM D5399
[9].
When reported, distillation characteristics of bio-based solvents shall be expressed by providing an initial
boiling point and an end point (Dry Point or Final Boiling Point) expressed in °C with a reporting precision in
compliance with the rules of the test method standard selected. The reference of the test method standard
shall be indicated also.
5.2.4 Evaporation rate
The evaporation rate of a solvent is a useful indication of the speed at which a solvent will dry. Depending
upon the types of solvents, different scales may be used. Three different methods are applicable to various
solvent types: ASTM D1901 [31], ASTM D3539 [32] and DIN 53170 [35].
Results of measure for the evaporation rates should be provided in accordance with the relevant test
standard. The reference to the test method standard shall be indicated also.
Such methods are used on a comparative basis against a reference volatile solvent such as Di-ethyl-ether or
n-butyl-acetate. Another potentially useful property, related to the evaporation rate, is the vapour pressure
measured or calculated at a specific temperature. The vapour pressure is a property indicated in the EU CLP
Safety Data Sheet in section 9 [5].
The value of the vapour pressure may be provided in place of the evaporation rate. For an overview of test
methodologies, see CEN/TR 16569 [10]. In that case, the value of the vapour pressure shall be indicated with
a proper unit (e.g. Pa, kPa or mm Hg) and the temperature at which the value refers. A reference shall be
indicated (i.e. measured or calculated).
5.2.5 Colour
Depending
...