ASTM D4904 - 99(2009)

    Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts

    Active Standard ASTM D4904 | Developed by Subcommittee: D31.01

    Book of Standards Volume: 15.04


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    ASTM D4904

    Significance and Use

    The solubility of extracts is influenced by temperature. The analytical solutions prepared from tanning extracts are dissolved or diluted in hot water. It is necessary to exercise caution in cooling these solutions and to do so in such a way as to avoid chilling, under-cooling, or uneven cooling of the solutions.

    1. Scope

    1.1 This practice covers a standard procedure for the cooling of analytical solutions such as those prepared Practices D 4901, D 4905, or D 6405. The tannin analysis results for an analytical solution are to some extent dependent on the conditions of the cooling of that solution.

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

    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 and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D4901 Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts

    D4905 Practice for Preparation of Solution of Solid, Pasty and Powdered Vegetable Tannin Extracts

    D6405 Practice for Extraction of Tannins from Raw and Spent Materials

    ALCA Methods

    A12 Cooling of Analytical Solutions Official Methods of the American Leather Chemists Association. Available from the American Leather Chemists Association, University of Cincinnati, P.O. Box 210014, Cincinnati, OH 45221-0014.


    UNSPSC Code

    UNSPSC Code 31221603(Organic tanning extracts of vegetable origin)


    DOI: 10.1520/D4904-99R09

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