ASTM D6696 - 14

    Standard Guide for Understanding Cyanide Species

    Active Standard ASTM D6696 | Developed by Subcommittee: D19.06

    Book of Standards Volume: 11.02


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    Significance and Use

    4.1 This guide provides standard terminology for use in identifying and describing the different chemical forms of cyanide. The complex nature of cyanide chemistry, existence of numerous distinct chemical forms as well as the various regulatory distinctions that may be made can lead to confusion in technical discussions on cyanide and in the selection of appropriate methods for its analysis. This guide is intended to provide clarification and a common framework of terms and definitions to facilitate discussions and referencing different cyanide chemical species and groups of cyanide compounds.

    4.2 The use of such common terminology is particularly important from an environmental perspective because certain forms of cyanide are considered to be toxic. Therefore, their release into the environment is regulated by federal and state agencies. Thus a general understanding of cyanide chemistry and species definitions is needed for proper wastewater management and testing.

    1. Scope

    1.1 This guide defines guidance based on a consensus of viewpoints for interpretation of test results to identify various chemical forms of cyanide. It is intended to provide a general understanding of the chemical nature of distinct cyanide species as related to chemical analysis and environmental fate and transport.

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


    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

    D1129 Terminology Relating to Water

    D1426 Test Methods for Ammonia Nitrogen In Water

    D3590 Test Methods for Total Kjeldahl Nitrogen in Water

    D7237 Test Method for Free Cyanide with Flow Injection Analysis (FIA) Utilizing Gas Diffusion Separation and Amperometric Detection


    ICS Code

    ICS Number Code 01.040.79 (Wood technology (Vocabularies)); 71.080.99 (Other organic chemicals)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/D6696

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