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Hydrogen cyanide – HCN

This page presents information on hydrogen cyanide – or hydrocyanic acid: characteristics, effects on health, detection devices & systems – hydrogen cyanide detector – and respiratory protective equipment (gas mask or PAPR with B gas filter).

Hydrogen cyanide detector and HCN gas mask respiratory protection

Hydrogen cyanide properties

Hydrogen cyanide (HCN) – also called hydrocyanic acid or formonitrile – is a chemical compound that can be found in either liquid or gaseous form. Widely used as an insecticide, it is also applied for fumigation applications in the chemical industry. It can be accidentally produced during chemical reactions between cyanide and an acid, or through fire and nitriles combustion.

CASTWA (8 hours)STEL (15 minutes)LELIPDensity / AirFilter / Air
74-90-82 ppm10 ppm5.6 %13.6 eV0.94B

Hydrogen cyanide effects on health

With variant color from colorless to pale blue, hydrogen cyanide (HCN) is easily detectable through its bitter almond smell. This highly toxic gas (T+) features many harmful or lethal properties. With explosive limits between 5.6 and 40%, this chemical compound is extremely flammable (F+).

Hydrogen cyanide effects on health (HCN)

Effet sur la santé du cyanure d’hydrogène

Hydrogen cyanide detector (HCN)

Despite its bitter almond fragrance, only a hydrogen cyanide detector can accurately measure concentrations of this gas. Even if this gas can explode at 5.6% volume, an % LEL measurement is useless as HCN is highly toxic. A portable or fixed hydrogen cyanide detection system should be used to properly monitor this gaseous substance.

The toxic gas detector GasBadge Pro ATEX series with interchangeable sensor. With a competitive price, this ATEX portable gas detector with interchangeable sensor combines power and flexibility.

  • Detection of Cl2, ClO2, CO, HCN, H2, H2S, NH3, NO2, O2, PH3, SO2.
  • Segmented LCD display for easy and direct reading
  • Internal data logging of alarm events and gas concentrations
  • CR2 3V lithium battery; 2,600 hours minimum runtime
  • Polycarbonate robust and waterproof housing
  • Additional information
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Portable toxic gas detector GASBADGE PRO

The toxic gas detector GasBadge Pro ATEX series with interchangeable sensor. With a competitive price, this ATEX portable gas detector with interchangeable sensor combines power and flexibility.

Portable gas detector GasBadge Pro
  • Detection of Cl2, ClO2, CO, HCN, H2, H2S, NH3, NO2, O2, PH3, SO2.
  • Segmented LCD display for easy and direct reading
  • Internal data logging of alarm events and gas concentrations
  • CR2 3V lithium battery; 2,600 hours minimum runtime
  • Polycarbonate robust and waterproof housing
Additional information

The GASBADGE PRO toxic gas detector is a classic single-gas detector. Its long-duration battery operates for about 2,600 hours and can be replaced when used. As for any other classic single-gas detectors, it is highly recommended to calibrate the GASBADGE PRO twice a year to ensure proper operation.

The GASBADGE PRO toxic gas monitor is a classic single-gas detector with interchangeable sensors and features a large range of electrochemical sensors. This technology is designed to detect toxic gases: Cl2 (chlorine), ClO2 (chlorine dioxide), CO (carbon monoxide), HCN (hydrogen cyanide), H2 (hydrogen), H2S (hydrogen sulfide), NH3 (ammonia), NO2 (nitrogen dioxide), O2 (oxygen), PH3 (phosphine) and SO2 (sulfur dioxide).

The GASBADGE PRO has 3 alarms: a powerful 95 dB audible alarm to alert even in noisy environments, a red LED visual alarm for view alert signals even in the darkest places like confined spaces and a vibrating alarm.

These alarms will be triggered by 4 events: if the lower or the upper limit values are reached, if concentrations get over the occupational exposure limit or if the average value threshold is exceeded. Abnormal gas concentrations and other data can also be saved and downloaded from the device.

Compact and lightweight, the GASBADGE PRO toxic gas detector is made with a strong polycarbonate housing with a robust and waterproof over-mold in compliance with IP67 protection. The GASBADGE PRO is ATEX approved as well for explosive atmosphere under current EU standards.

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Portable multigas detector – VENTIS PRO5 – up to 5 gases

The Ventis Pro5 detector is equipped with new features such as a panic button to improve safety of workers evolving in hazardous areas.

Detection of the combustible gases, NH3, CO, CO/H2S, H2S, HCN, NO2, O2, SO2, CO2, HC.

  • Dimensions: 104 x 58 x 36 mm – weight: 200 grams without pump
  • Audible (95 dB), LED visual (2 red and 2 blue) and vibrating alarms
  • Rechargeable lithium-ion battery with optional extended battery
  • Polycarbonate housing with waterproof rubber overmold (IP68)
  • Datalogging over 3 months with 10 seconds interval
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Portable multigas detector – VENTIS PRO5 – up to 5 gases

The Ventis Pro5 detector is equipped with new features such as a panic button to improve safety of workers evolving in hazardous areas.

Detection of the combustible gases, NH3, CO, CO/H2S, H2S, HCN, NO2, O2, SO2, CO2, HC.

  • Dimensions: 104 x 58 x 36 mm – weight: 200 grams without pump
  • Audible (95 dB), LED visual (2 red and 2 blue) and vibrating alarms
  • Rechargeable lithium-ion battery with optional extended battery
  • Polycarbonate housing with waterproof rubber overmold (IP68)
  • Datalogging over 3 months with 10 seconds interval
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Toxic corrosive & combustible gas detector – satellite xt

The Satellite XT is a fixed gas detector with interchangeable sensors. It is especially designed to continuously monitor hazardous concentrations of gases.

Detected gases: AsH3, BBr3, B2H6, BCl3, BF3, Br2, C2H4O, Cl2, ClF3, ClO2, CO, COCl2, F2, GeH4, H2, H2S, H2Se, HBr, HCl, HCN, HF, HMDS, MCF, MMH, N2H4, NH3, NO, NO2, O2, O3, PH3, POCl3, SiCl4, SiHCl3, SO2,TBA, TBP, TDMAT, TEOS, TMB, TMP, UDMH, WF6.

  • Fxed gas detector Satellite XT
  • Pyrolysis module detection: C4F6, C5F8, CH3F, DCE 1.2, NF3, SF6
  • Pre-calibrated interchangeable sensors, easy maintenance
  • 4-20mA linear output
  • 3 optional single-pole relays
  • Optional remote measure (up to 3 meters)
Request a quote

Toxic corrosive & combustible gas detector – satellite xt

The Satellite XT is a fixed gas detector with interchangeable sensors. It is especially designed to continuously monitor hazardous concentrations of gases.

Detected gases: AsH3, BBr3, B2H6, BCl3, BF3, Br2, C2H4O, Cl2, ClF3, ClO2, CO, COCl2, F2, GeH4, H2, H2S, H2Se, HBr, HCl, HCN, HF, HMDS, MCF, MMH, N2H4, NH3, NO, NO2, O2, O3, PH3, POCl3, SiCl4, SiHCl3, SO2,TBA, TBP, TDMAT, TEOS, TMB, TMP, UDMH, WF6.

Fxed gas detector Satellite XT
  • Pyrolysis module detection: C4F6, C5F8, CH3F, DCE 1.2, NF3, SF6
  • Pre-calibrated interchangeable sensors, easy maintenance
  • 4-20mA linear output
  • 3 optional single-pole relays
  • Optional remote measure (up to 3 meters)
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Fixed gas detector SERIE 3000 for oxygen and toxic gas

Loop-powered (4-20 mA 2 wires) and equipped with an LCD display, the Serie 3000 fixed oxygen and toxic gas detector is particularly well-suited for potentially explosive atmospheres (ATEX zones).

  • Fixed gas detector serie 3000 transmitter
  • Large range of pre-calibrated gas detection sensors
  • Loop-powered, 2 cables
  • LCD screen for setup and concentrations display
  • Aluminum version or stainless steel with epoxy paint version
  • Approved for hazardous areas, L/c-UL, ATEX, IECEx. Protection IP66 (EN 60529), NEMA 4X

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Fixed gas detector SERIE 3000 for oxygen and toxic gas

Loop-powered (4-20 mA 2 wires) and equipped with an LCD display, the Serie 3000 fixed oxygen and toxic gas detector is particularly well-suited for potentially explosive atmospheres (ATEX zones).

Fixed gas detector serie 3000 transmitter
  • Large range of pre-calibrated gas detection sensors
  • Loop-powered, 2 cables
  • LCD screen for setup and concentrations display
  • Aluminum version or stainless steel with epoxy paint version
  • Approved for hazardous areas, L/c-UL, ATEX, IECEx. Protection IP66 (EN 60529), NEMA 4X

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Hydrogen cyanide respiratory protection (HCN)

As HCN is highly toxic, it is recommended to use a purifying respiratory protection like a half- mask or a full-face mask for short interventions. A more comfortable powered air purifying respirator equipped with a B filter can also be used for longer time periods. If the HCN concentrations exceed 60 times the OEL, a self-contained breathing apparatus (SCBA) is required to preserve safety.

Respiratory protective half-mask – PROFILE40

PROFILE40 is a single-cartridge half-mask featuring a DIN 40mm thread which complies with EN148-1 standard – related to respiratory protective half-masks

  • Compatible with every PRO2000 filter less than 300 grams
  • Robust LSR silicon facepiece with large face seal
  • Easy adjustable harness for device airtight
  • Particularly suitable with eyewear and safety glasses
  • Available in 2 different sizes
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Respiratory protective half-mask – PROFILE40

PROFILE40 is a single-cartridge half-mask featuring a DIN 40mm thread which complies with EN148-1 standard – related to respiratory protective half-masks

Demi-masque DIN40 PROFILE40
  • Compatible with every PRO2000 filter less than 300 grams
  • Robust LSR silicon facepiece with large face seal
  • Easy adjustable harness for device airtight
  • Particularly suitable with eyewear and safety glasses
  • Available in 2 different sizes
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Full face gas mask – SARI

The SARI gas mask provides operating comfort and efficient protection against toxic gases and particles (solid, radioactive, smokes), bacteria and virus.

  • Compatible with PRO2000 filter range (gas, particle and combined)
  • Central phonic membrane for easy communication
  • Compatible with powered air equipment
  • Internal mask with non-return and anti-fog valves, reduces CO2
  • Fully adjustable 5 points harness for improved operating comfort
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Full face gas mask – SARI

The SARI gas mask provides operating comfort and efficient protection against toxic gases and particles (solid, radioactive, smokes), bacteria and virus.

masque sari contre les gaz toxiques et vapeurs chimiques
  • Compatible with PRO2000 filter range (gas, particle and combined)
  • Central phonic membrane for easy communication
  • Compatible with powered air equipment
  • Internal mask with non-return and anti-fog valves, reduces CO2
  • Fully adjustable 5 points harness for improved operating comfort
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Powered air purifying respirator Duraflow

The Duraflow powered air respirator is a versatile solution for hazardous workspaces. It provides a quality respiratory protection for a fair price.

  • The powered air purifying respirator Duraflow PAPR
  • Compatibility with RD DIN 40 universal filter cartridges
  • Rechargeable battery – 2 available version: 8 or 16 hours runtime
  • Automatic airflow regulation (160l/min)
  • Visual alarms, notifications and display
  • CEN1294 & CE0086 certified, IP55/IP67

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Powered air purifying respirator Duraflow

The Duraflow powered air respirator is a versatile solution for hazardous workspaces. It provides a quality respiratory protection for a fair price.

The powered air purifying respirator Duraflow PAPR
  • Compatibility with RD DIN 40 universal filter cartridges
  • Rechargeable battery – 2 available version: 8 or 16 hours runtime
  • Automatic airflow regulation (160l/min)
  • Visual alarms, notifications and display
  • CEN1294 & CE0086 certified, IP55/IP67

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Powered air purifying respirator PROFLOW 2

The Proflow2 PAPR is a compact and lightweight device featuring a curved backplate for user comfort during long-term applications. This powered air purifying respirator is available in 120L/min or 160L/min versions.

  • complete Scott Safety PAPR powered-air-purifying Proflow2
  • DIN40 standard filters compatible with single-cartridge masks.
  • From 7 to 15 hours runtime depending on the face piece.
  • 70 dB audible low battery alarm.
  • Compatible with many face pieces.
  • Certifications: complies with EN12941 and 12942 standards.
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Powered air purifying respirator PROFLOW 2

The Proflow2 PAPR is a compact and lightweight device featuring a curved backplate for user comfort during long-term applications. This powered air purifying respirator is available in 120L/min or 160L/min versions.

complete Scott Safety PAPR powered-air-purifying Proflow2
  • DIN40 standard filters compatible with single-cartridge masks.
  • From 7 to 15 hours runtime depending on the face piece.
  • 70 dB audible low battery alarm.
  • Compatible with many face pieces.
  • Certifications: complies with EN12941 and 12942 standards.
Request a quote
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