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KT5006 - Cyanide Sulfide Test Kit

KT5006 - Cyanide Sulfide Test Kit

SKU: KT5006

Finds cyanide in substances with a pH of 0-14 (a cyanide mixed with a non-metallic acid precursor such as phosphorous pentoxide will have a pH of 0-1 but not release the cyanide until mixed with water)


Some cyanide salts are insoluble in water or have a neutral pH. These cyanides still react with acids and are hazardous:

  • Copper-CN pH 7
  • Mercuric-CN pH 8
  • Silver-CN pH 8
  • Zinc-CN pH 7


  • Finds cyanide in samples that test +ve as Oxidizers
  • Other tests state: “Samples that test +ve oxidizer cannot contain “CN”.  
    • Not true.
  • Oxidizers such as sodium hypochlorite & hydrogen peroxide convert cyanide to cyanate removing the “CN hazard” but many other oxidizers do not have that effect on cyanides.
  • Oxidizers that can be mixed with CN salts without converting them to cyanates; whose mixtures are +ve Oxidizer include:
    • Sodium Percarbonate
    • Potassium Chlorate
    • Potassium Chromate
    • Copper Sulfate
    • Compounds such as copper-CN & chromium-CN give a +ve Oxidizer Test due to the metal HAS NO interferences, no false +ves, no false -ves
  • Other tests have:
    • False +ves: Thiocyanates – sodium thiocyanate, potassium thiocyanate, mercury thiocyanate
    • False -ves: When cyanides are mixed with: bromide, iodide, chromate, permanganate, or strong reducing agent: tin chloride, sodium sulfite, sodium borohydride or zinc metal, a false -ve occurs
    • More False -ves: Copper cyanide, palladium cyanide, mercuric cyanide & silver cyanide give false -ves
  • Works in any matrix
  • If the cyanide is mixed with a paint, the test still works – it looks for hydrogen cyanide gas in the atmosphere above the sample
    • Other tests rely on color changes to strips of test paper immersed in the sample. If the matrix has a color, this can interfere with reading the test strip
  • Requires only 1ml of liquid sample or ½ spoonful of solid sample
    • Other tests require 5ml of liquid sample & do not give instruction for solids
  • HAZCAT’s reagents do not have a shelf life
    • Other tests use papers/reagents with expiration dates


Hazcat’s Sulfide Test

  • Not dependent on matrix being tested
  • Finds H2S gas in the atmosphere above the sample
  • Gives a positive with a wide range of sulfide types
  • Will give a +ve with Acid-volatile sulfides:
  • iron sulfides; FeS, Fe3S4, pyrrhotite, & monosulfides of other metals
  • Copper & silver sulfides are so insoluble they don’t respond in other test methods
  • Hazcat’s sulfide test gives a +ve with these substances
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