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What is the UN number for IG-541?

Published in Fire Suppression Systems 2 mins read

The UN number for IG-541 is 1956.

IG-541 is an inert gaseous mixture widely utilized in fixed fire extinguishing systems. Known for its effectiveness in fire suppression, this agent is a blend of specific inert gases designed to reduce the oxygen concentration in a protected area to a level that extinguishes a fire, without posing a risk to human occupants or damaging sensitive equipment.

Understanding IG-541 and its Application

IG-541 is precisely formulated to consist of:

  • 52% Nitrogen
  • 40% Argon
  • 8% Carbon Dioxide

This unique composition allows IG-541 to rapidly extinguish fires by lowering the oxygen level below the point required for combustion. The presence of carbon dioxide in the mixture helps to stimulate respiration, making it a safer option for occupied spaces compared to some other fire suppression agents. It is commonly employed in environments where water or chemical agents might cause damage, such as:

  • Data centers
  • Telecommunications facilities
  • Museums and archives
  • Control rooms

The UN number, or United Nations number, is a four-digit code used internationally to identify hazardous substances and articles for transport. These numbers are assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods to ensure safe handling and transport of materials.

Here's a quick reference for the UN number of IG-541:

Component UN Number
IG-541 1956

As a non-conductive, non-corrosive, and zero-ozone depleting agent, IG-541 offers an environmentally friendly and safe solution for fire protection, leaving no residue after discharge. Its classification under UN 1956 pertains to its nature as a compressed gas mixture for transport purposes.