Ethanol for industrial use - Methods of test - Part 6: Test for miscibility with water

The principle of the procedure consists in addition of water to a test portion, under specified conditions, and examination for opalescence against a black background with side illumination, using a second Nessler cylinder containing water as the standard. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.

Éthanol à usage industriel — Méthodes d'essai — Partie 6: Essai de miscibilité à l'eau

General Information

Status
Published
Publication Date
31-Oct-1981
Technical Committee
ISO/TC 47 - Chemistry
Drafting Committee
ISO/TC 47 - Chemistry
Current Stage
9093 - International Standard confirmed
Start Date
29-Nov-2023
Completion Date
13-Dec-2025

Relations

Effective Date
06-Jun-2022
Effective Date
15-Apr-2008

Overview

ISO 1388-6:1981 - Ethanol for industrial use - Methods of test - Part 6: Test for miscibility with water - specifies a simple, objective procedure to determine whether a sample of industrial ethanol is miscible with water. The test is based on adding water to a measured test portion and visually inspecting for opalescence under defined conditions. This method is part of the ISO 1388 series for assessing quality attributes of industrial ethanol.

Key topics and requirements

  • Scope: Applies to ethanol for industrial use; intended to be read in conjunction with ISO 1388/1 (general instructions).
  • Principle: Addition of water to a test portion and observation for opalescence (turbidity) as an indicator of incomplete miscibility.
  • Test portion: Take 5 ml of the laboratory sample (or a different volume agreed between parties).
  • Dilution: Dilute the test portion with water to the 100 ml mark in a 100 ml Nessler cylinder (or agreed equivalent). Mix and adjust temperature to about 20 °C.
  • Apparatus: Two matched 100 ml Nessler cylinders; ordinary laboratory glassware suffices.
  • Reference/Standard: Use a second Nessler cylinder containing 100 ml of water as the visual standard.
  • Observation conditions: Examine the test solution vertically against a black background with side illumination; compare to the water standard for opalescence.
  • Reagent quality: Use distilled water or water of equivalent purity for the test.
  • Reporting: Record the dilution ratio used and the presence or absence of opalescence.

Applications and users

This standard is intended for:

  • Quality control laboratories at ethanol production and processing facilities
  • Chemical suppliers and purchasers performing incoming/outgoing quality checks
  • Industrial users who must verify ethanol compatibility with aqueous systems (blending, formulation, or production processes)
  • Regulatory and inspection bodies requiring a reproducible, standardized miscibility test

The test supports decisions about product acceptability, blending compatibility, storage stability, and process control by providing a quick pass/fail visual assessment of ethanol–water miscibility.

Related standards

ISO 1388-6 is part of the broader ISO 1388 series addressing tests for industrial ethanol. The annex lists related parts covering general procedures and specific determinations such as alkalinity/acidity, carbonyl compounds, aldehydes, methanol content, esters, hydrocarbons, furfural and permanganate time (ISO 1388/1 to ISO 1388/12). Refer to the ISO 1388 series for complementary test methods and full quality assessment of ethanol for industrial use.

Keywords: ISO 1388-6, ethanol for industrial use, miscibility with water test, Nessler cylinder, opalescence, dilution ratio, distilled water.

Standard

ISO 1388-6:1981 - Ethanol for industrial use -- Methods of test

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Standard

ISO 1388-6:1981 - Éthanol a usage industriel -- Méthodes d'essai

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Standard

ISO 1388-6:1981 - Éthanol a usage industriel -- Méthodes d'essai

French language
2 pages
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Frequently Asked Questions

ISO 1388-6:1981 is a standard published by the International Organization for Standardization (ISO). Its full title is "Ethanol for industrial use - Methods of test - Part 6: Test for miscibility with water". This standard covers: The principle of the procedure consists in addition of water to a test portion, under specified conditions, and examination for opalescence against a black background with side illumination, using a second Nessler cylinder containing water as the standard. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.

The principle of the procedure consists in addition of water to a test portion, under specified conditions, and examination for opalescence against a black background with side illumination, using a second Nessler cylinder containing water as the standard. - International Standards ISO 1388/1 to ISO 1377/12 cancel and replace ISO Recommendation R 1388-1970 of which they constitute a technical revision.

ISO 1388-6:1981 is classified under the following ICS (International Classification for Standards) categories: 71.080.60 - Alcohols. Ethers. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO 1388-6:1981 has the following relationships with other standards: It is inter standard links to ISO 15877-2:2003, ISO/R 1388:1970. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase ISO 1388-6:1981 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.

Standards Content (Sample)


International Standard 138816
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME~YHAPO~HA~ OPTAHM3Al&lR fl0 CTAH~APTH3ALWl.ORGANISATION INTERNATIONALE DE NORMALISATION
Ethanol for industrial use - Methods of test -
Part 6 : Test for miscibility with water
Partie 6 : Essai de miscibilitk 2 l’eau
Methanol 2 wage industriel - NIethodes d’essai -
First edition - 1981-11-01
UDC 661.722 : 543.862.1
Ref. No. ISO 1388/6-1981 (@l
Descriptors : industrial products, ethanols, tests, mixtures, water.
Price based on 2 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bedies). The work of developing Inter-
national Standards is carried out through ISO technical committees. Every member
body interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 1388/6 was developed by Technical Committee ISO/TC 47,
Chemistry, and was circulated to the member bodies in February 1980.
lt has been approved by the member bodies of the following countries :
Germany, F. R. Romania
Australia
Austria Hungary South Africa, Rep. of
India
Belgium Switzerland
Thailand
Brazil Italy
Bulgaria Korea, Rep. of United Kingdom
China Netherlands USSR
Czechoslovakia Philippines
France Poland
No member body expressed disapproval of the document.
International Standards ISO 1388/1 to ISO 1388/12 cancel and replace ISO Recom-
mendation R 1388-1970, of which they constitute a technical revision.
International Organkation for Standardkation, 1981
Printed in Switzerland
ISO 1388/6-1981 (E)
INTERNATIONALSTANDARD
Ethanol for industrial use - Methods of test -
Part 6 : Test for miscibility with water
5 Procedure
1 Scope and field of application
This part of ISO 1388 s
...


Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWlE~YHAPO,QHAFI OPTAHH3A~MR Il0 CTAH~APTH3AL&lM~RGANISATION INTERNATIONALE DE NORMALISATION
Éthanol à usage industriel - Méthodes d’essai -
Partie 6 : Essai de miscibilité à l’eau
Part 6 : Test for miscibifity with wa ter
Ethanol for industrial use - Methods of test -
Première édition - 1981-11-01
G:
Y
CDU 661.722 : 543.862.1 Réf. no : I§O 1388/6-1981 (F)
Descripteurs : produit industriel, éthanol, essai, mélange, eau.
Prix basé sur 2 pages
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale ISO 1388/6 a été élaborée par le comité technique ISO/TC 47,
Chimie, et a été soumise aux comités membres en février 1980.
Les comités membres des pays suivants l’ont approuvée :
Corée, Rép. de Roumanie
Afrique du Sud, Rép. d’
Allemagne, R. F. France Royaume-Uni
Australie Hongrie Suisse
Autriche Inde Tchécoslovaquie
Italie Thaïlande
Belgique
Brésil Pays- Bas URSS
Bulgarie Philippines
Chine Pologne
Aucun comité membre ne l’a désapprouvée.
Les Normes internationales ISO X388/1 à ISO 1388/12 annulent et remplacent la
Recommandation ISO/R 1388-1970, dont elles constituent une révision technique.
Organisation internationale de normalisation, 1981
Imprimé en Suisse
ISO 1388/6-1981 (F)
NORME INTERNATIONALE
Éthanol à usage industriel - Méthodes d’essai -
Partie 6 : Essai de miscibilité à l’eau
5 Mode opératoire
1 Objet et domaine d’application
La présente partie de I’ISO 1388 spécifie un essai de miscibilité
5.1 Prise d’ess
...


Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWlE~YHAPO,QHAFI OPTAHH3A~MR Il0 CTAH~APTH3AL&lM~RGANISATION INTERNATIONALE DE NORMALISATION
Éthanol à usage industriel - Méthodes d’essai -
Partie 6 : Essai de miscibilité à l’eau
Part 6 : Test for miscibifity with wa ter
Ethanol for industrial use - Methods of test -
Première édition - 1981-11-01
G:
Y
CDU 661.722 : 543.862.1 Réf. no : I§O 1388/6-1981 (F)
Descripteurs : produit industriel, éthanol, essai, mélange, eau.
Prix basé sur 2 pages
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale ISO 1388/6 a été élaborée par le comité technique ISO/TC 47,
Chimie, et a été soumise aux comités membres en février 1980.
Les comités membres des pays suivants l’ont approuvée :
Corée, Rép. de Roumanie
Afrique du Sud, Rép. d’
Allemagne, R. F. France Royaume-Uni
Australie Hongrie Suisse
Autriche Inde Tchécoslovaquie
Italie Thaïlande
Belgique
Brésil Pays- Bas URSS
Bulgarie Philippines
Chine Pologne
Aucun comité membre ne l’a désapprouvée.
Les Normes internationales ISO X388/1 à ISO 1388/12 annulent et remplacent la
Recommandation ISO/R 1388-1970, dont elles constituent une révision technique.
Organisation internationale de normalisation, 1981
Imprimé en Suisse
ISO 1388/6-1981 (F)
NORME INTERNATIONALE
Éthanol à usage industriel - Méthodes d’essai -
Partie 6 : Essai de miscibilité à l’eau
5 Mode opératoire
1 Objet et domaine d’application
La présente partie de I’ISO 1388 spécifie un essai de miscibilité
5.1 Prise d’ess
...

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