ISO 1063:1974

Surface active agents — Determination of stability in hard water

Publication date: Dec 1, 1974

General information

Current stage: 90.20 Effective date: Apr 15, 2026

Originator: ISO

Owner: ISO/TC 91

Type: International Standard

ICS: 71.100.40

Languages: French English

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Status: Published

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Scope

Solutions of the substance to be tested in differing concentrations are mixed with hard water solutions of differing known calcium hardness. After leaving the solutions to stand in specified conditions their appearance, i.e. clearness, opalescence, cloudiness or precipitation is observed. The method is applicable to surface active agents soluble in water at 20 °C. It can be extended to those which are soluble at approximately 50 °C.

Life cycle

NOW

PUBLISHED
ISO 1063:1974
90.20 Standard under periodical review
Apr 15, 2026

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