SIST EN ISO 4320:1997 PDF
Non-ionic surface active agents - Determination of cloud point index - Volumetric method (ISO 4320:1977, Including Erratum:1980)
Non-ionic surface active agents - Determination of cloud point index - Volumetric method (ISO 4320:1977, Including Erratum:1980)
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 5
- Дата публикации:
- 1 декабря 1997 г.
- ICS:
- 71.100.40
- Технический комитет:
- KDS - Cosmetics, chemical disinfectants and surface active agents
The determination is carried out by adding, at 30 degree Celsius, of distilled water to a propanol solution to the surface active agent until the appearance of cloudiness. The determination of the cloud point index provided a way of characterizing weakly alkoxylated derivates and their hydrocarbon hydrophobic groups. This simple and rapid measurement is a valuable means for checking the level of alkoxylation of non-ionic derivatives intended, for example, for sulphonation.
Abstract
Overview
EN ISO 4320:1997 (ISO 4320:1977, Erratum 1980) specifies a volumetric method for determining the cloud point index of non‑ionic surface active agents (surfactants). The test measures the volume of distilled water that must be added, at 30 °C, to a propan‑1‑ol solution of the surfactant until cloudiness appears. This simple, rapid measurement is used to characterise weakly alkoxylated derivatives (typically 1–5 oxyethylene groups) and to check the level of alkoxylation for quality control and downstream processing (for example, prior to sulphonation).
Key topics and requirements
- Scope: Applicable to non‑ionic surfactants with hydrophobic groups from alcohols, alkylphenols or fatty acids (melting point
Технические детали
- SKU
- SIST EN ISO 4320:1997
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