ISO 25157:2013

INTERNATIONAL ISO
STANDARD 25157
First edition
2013-04-15
Essential oil of rose, Chinese Kushui
type (Rosa sertata × Rosa rugosa)
Huile essentielle de rose, type chinois Kushui (Rosa sertata × Rosa
rugosa)
Reference number
©
ISO 2013
© ISO 2013
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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
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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, www.iso.org/directives.
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The committee responsible for this document is ISO/TC 54, Essential oils.
INTERNATIONAL STANDARD ISO 25157:2013(E)
Essential oil of rose, Chinese Kushui type (Rosa sertata ×
Rosa rugosa)
1 Scope
This International Standard specifies certain characteristics of the essential oil of rose, Chinese Kushui
type (Rosa sertata × Rosa rugosa) cultivated mainly in China, in order to facilitate assessment of its quality.
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.
ISO/TR 210, Essential oils — General rules for packaging, conditioning and storage
ISO/TR 211, Essential oils — General rules for labelling and marking of containers
ISO 212, Essential oils — Sampling
ISO 279, Essential oils — Determination of relative density at 20 °C — Reference method
ISO 280, Essential oils — Determination of refractive index
ISO 592, Essential oils — Determination of optical rotation
ISO 709, Essential oils — Determination of ester value
ISO 1041, Essential oils — Determination of freezing point
ISO 11024 (all parts), Essential oils — General guidance on chromatographic profiles
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
essential oil of rose, Chinese Kushui type
essential oil obtained by steam distillation of the flowers of Rosa sertata × Rosa rugosa cultivated
mainly in China
[2]
Note 1 to entry: For information on the CAS number, see ISO/TR 21092.
4 Requirements
4.1 Appearance
Liquid or more or less crystallized.
4.2 Colour
Light yellow or yellow brown.
4.3 Odour
Characteristic, full-bodied, floral, rose.
Relative density at 20 °C d
Minimum: 0,880.
Maximum: 0,930.
4.4 Refractive index at 20 °C
Minimum: 1,4680.
Maximum: 1,4798.
4.5 Optical rotation at 20 °C
Between −10,3° and −0,5°.
4.6 Freezing point
Between 11 °C and 14 °C.
4.7 Ester value
Minimum: 18.
Maximum: 24.
4.8 Chromatographic profile
Carry out the analysis of the essential oil by gas chromatography. Identify in the chromatogram obtained
the representative and characteristic components shown in Table 1. The proportions of these components,
indicated by the integrator, shall be as shown in Table 1. This constitutes the chromatographic profile
of the essential oil.
4.9 Flashpoint
Information on the flashpoint is given in Annex B.
5 Sampling
Sampling shall be performed in accordance with ISO 212.
Minimum volume of test sample: 25 ml.
NOTE This volume allows each of the tests specified in this International Standard to be carried out at least once.
2 © ISO 2013 – All rights reserved

Table 1 — Chromatographic profile
Minimum Maximum
Components
% %
a
Ethanol n.d. 1,0
a
cis-Rose oxide n.d. 0,5
Linalool 1,0 3,5
a
β-Phenylethyl alcohol n.d. 0,3
Citronellol 40,0 50,0
N
...