Poison Gas Sign

Poison Gas Sign – ISO 7010 Warning Symbol HS0033

This Poison Gas sign warns crew and contractors that a toxic gas capable of causing serious harm or death may be present in the marked area. This sign combines the internationally recognised skull-and-crossbones pictogram with a bold “DANGER – Poison gas” text panel beneath it, pairing the instant visual cue with an explicit written instruction. As SKU HS0033 in the Hazard Signs range, it is built for continuous marine exposure and suits fumigated cargo holds, refrigerant compressor rooms, chemical tank vent points and any compartment where a toxic gas release is a recognised risk.

The upper pictogram shows the classic skull and crossbones, while the lower panel spells out “DANGER” in bold capitals followed by “Poison gas” in smaller text, a combined format useful where an explicit English instruction reinforces the severity implied by the skull symbol for crew, contractors and visiting surveyors alike.

Because a poison gas hazard is invisible and often odourless at dangerous concentrations, the wording gives an unambiguous warning that no one should assume the space is safe based on appearance alone. The photoluminescent base keeps the poison gas warning visible for a period after lighting fails, relevant at fumigated holds and compressor rooms accessed during low-light rounds.

Why Poison Gas Marking Matters

Exposure to poison gas can cause loss of consciousness or death within minutes, with no reliable sensory warning at the concentrations that matter, making clear signage one of the only pre-entry controls available at a fumigated or gas-risk compartment.

Standardised signage supports the vessel’s confined space and fumigation clearance procedures, reminding crew that atmosphere testing and ventilation are required before entry regardless of how the space appears. It also warns visiting stevedores, surveyors and port officials who may be unfamiliar with which holds or compartments have been fumigated or carry a gas risk.

Compliance and Certification

This sign is produced to align with IMO shipboard safety signage guidance and the combined pictogram-and-text warning format referenced in fumigation and toxic gas safety practice, supporting the SOLAS and ISM Code requirements for confined space and gas hazard control aboard vessels. A visible poison gas warning at fumigated holds and compressor rooms is a documented control that flag-state inspectors and classification surveyors specifically check for during a vessel’s fumigation and gas safety review.

Installation Recommendations

Mount the sign directly at every access point to a fumigated hold, gas-risk compartment or compressor room, at a height that is seen before the access point is opened, using the pre-drilled fixing holes with marine-grade fasteners for exterior deck fittings and the self-adhesive backing for interior hatch covers and cabinet doors. Remove or replace fumigation-specific signage promptly once a space has been tested and certified gas-free, to avoid warnings being ignored once they no longer apply.

• 425 x 567mm rigid or self-adhesive format for steel, aluminium or GRP surfaces
• Photoluminescent base for visibility during power loss or blackout drills
• UV-stable, saltwater-resistant construction for long-term exterior exposure
• Self-adhesive or pre-drilled fixing options for fast, secure installation
• Combined pictogram and bold English text for added clarity beyond the symbol alone

Order the HS0033 Poison Gas sign today to mark every fumigated hold and gas-risk compartment before your next confined space audit. Safety Sign Hub stocks the complete IMPA/ISSA-coded hazard sign range and ships marine-grade signage across Australia and to vessels in port, with bulk pricing for fleet orders.

See the full Hazard Signs range for related ISO 7010 warning pictograms, or browse our Fire Fighting Signs for IMO A.654(16) fire control signage to complete your vessel’s safety signage plan.