Standard Test Method for Acidity in Basic Chromium Tanning Liquors

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

04-01-2020

Publisher

American Society for Testing and Materials

1.1This test method covers the determination of the titratable acidity of chromium tanning liquors. By titratable acidity is meant not only free acidity, which is rarely present, but also anions combined with weakly basic cations such as Chromium (III), which can be titrated with base at the phenolphthalein end point.

1.2The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3This 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.

1.4This 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.

Committee	D 31
DocumentType	Test Method
Pages	3
ProductNote	ε1NOTE—Editorial changes, including standardizing the use of Arabic versus Roman numerals to refer to Procedures 1and 2, were made in April 2020.
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM D 3913 : 2003 : R2015

ASTM D 3898 : 1993 : R2023	Standard Test Method for Chromic Oxide in Basic Chromium Tanning Liquors
ASTM D 3898 : 1993 : R2015	Standard Test Method for Chromic Oxide in Basic Chromium Tanning Liquors