ASTM-D2024 2023

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D2024-09(2023) Standard Test Method for Cloud Point of Nonionic Surfactants

Published By	Publication Date	Number of Pages
ASTM	2023

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Categories: 71.100.40 - Surface active agents, ASTM

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Description

ASTM D2024-09-Reapproved2023

Active Standard: Standard Test Method for Cloud Point of Nonionic Surfactants

ASTM D2024

Scope

1.1 This test method covers a procedure to determine the “cloud point” of nonionic surfactants or detergent systems. Cloud Point is the temperature at which dissolved components (solids or liquids) are no longer completely soluble, precipating as a second phase giving the fluid a cloudy appearance. It is limited to those surfactants and detergent systems for which the visible solubility change occurs over a range of 1 °C or less at concentrations of 0.5 % to 1.0 % in DI water between 30 °C and 95 °C.

1.2 Chemical Limitations—Nonionic surfactants that exhibit a characteristic cloud point in general terms consist of a water-in-soluble moiety condensed with 50 % to 75 % by weight of ethylene oxide. If the level of ethoxylation is too low the surfactant may not be water soluble at temperatures less than 30 °C, and if it is too high no cloud point may exist.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Keywords

ICS Code

ICS Number Code 71.100.40 (Surface active agents)

DOI: 10.1520/D2024-09R23

Additional information

Standard Title	D2024-09(2023) Standard Test Method for Cloud Point of Nonionic Surfactants
Published Code	ASTM
Publication Date	2023
ICS Codes	71.100.40 - Surface active agents