ASTM D3913-03
Standard Test Method for Acidity in Basic Chromium Tanning Liquors

Standard No.

ASTM D3913-03

Release Date

2003

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D3913-03(2009)

Latest

ASTM D3913-03(2020)e1

Scope

The acidity of a chrome tanning liquor, as determined by this test method, is rarely employed as such. This result is normally combined with the results of a chromium analysis (see Test Method D 3898) to determine a property of the liquor called basicity. This property, equal to the percentage by which anions in a normal chromic salt have been replaced by hydroxyl in the solution being analyzed, is closely related to the tanning behavior of the solution.

1.1 This 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.

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

ASTM D3913-03 history

• 2020 ASTM D3913-03(2020)e1 Standard Test Method for Acidity in Basic Chromium Tanning Liquors
• 2003 ASTM D3913-03(2015) Standard Test Method for Acidity in Basic Chromium Tanning Liquors
• 2003 ASTM D3913-03(2009) Standard Test Method for Acidity in Basic Chromium Tanning Liquors
• 2003 ASTM D3913-03 Standard Test Method for Acidity in Basic Chromium Tanning Liquors
• 1993 ASTM D3913-93(1998) Standard Test Method for Acidity in Basic Chromium Tanning Liquors