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ASTM D4193-02

Historical Revision

Standard Test Method for Thiocyanate in Water

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1.1 This test method covers the determination of dissolved thiocyanate in water, waste water, and saline water in the range from 0.1 to 2.0 mg/L. For higher concentrations, use an aliquot from the diluted sample.

1.2 This test method has been used successfully with reagent grade, natural, and treated sanitary effluent waters. It is the user's responsibility to assure the validity of the test method on any untested matrices.

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. For specific hazards, see Section 9.


Many natural waters contain thiocyanate from organic decomposition products and waste water discharges. Some industrial wastes, such as those from the steel industry, petroleum refining, and coal gasification, may contain significant concentrations of thiocyanate. Thiocyanate per se is not recognized as a toxic chemical compound. However, when chlorinated, thiocyanate is converted to the highly toxic and volatile cyanogen chloride.

5.1.1 For information on the impact of cyanogen compounds, see Appendix X1 of Test Method D 2036.

SDO ASTM: ASTM International
Document Number D4193
Publication Date July 10, 2002
Language en - English
Page Count 4
Revision Level 02
Supercedes
Committee D19.06
Publish Date Document Id Type View
June 1, 2013 D4193-08R13E01 Revision
May 1, 2008 D4193-08 Revision
July 10, 2002 D4193-02 Revision
Jan. 1, 1995 D4193-95 Revision
Jan. 1, 2020 D4193-08R20E01 Reaffirmation