Gas Suppression Agent

NAF P-III® (HCFC Blend C) is a synthetic compound, typically used as a streaming gas suppression agent. NAF P-III is stored as a liquid and vaporises at -1.9 °C. Above all, It was designed as a replacement for Halon 1211 (which vaporises at – 3.3 °C). Therefore, NAF P-III is a Scheduled Gas Suppression Agent and requires an Extinguishing Agent Handling Licence (EAHL).

NAF P-III HCFC Blend C Fire Agent

Moreover, NAF P-III, identified as “HCFC Blend C” by international standards on clean agent extinguishing systems, shows physical characteristics similar to those of Halon 1211. However, in most cases, it is possible to replace existing Halon 1211 systems with NAF P III without modifying the existing pipe-work.

For most common special hazards, NAF P-III requires 10% more agent by weight than Halon 1211.

The overall environmental impact (GWP of 1546, an ODP of 0.048 and Atmospheric Lifetime ~1.4 years) is low compared to halocarbons.


Firstly, with a discharge time of ten seconds or less, lives and valuable assets benefit from the virtually instant response to the danger posed by fire. Secondly, NAF P-III is a clean agent that will not harm sensitive equipment. Therefore, it is ideal for use where conventional water-based sprinklers are not desirable as the first line of defence.

Furthermore, with a boiling point of – 1.9 °C, NAF P-111 is easily distributed inside the protected environment, even in low-temperature conditions. However, the low toxicity of NAF P-III allows for safe use in normally occupied areas in most common applications. Moreover, the addition of a patented additive, which reduces the decomposition of by-products, makes it safer for humans and goods.


Halon 1301 and Halon 1211 were primarily used in the marine industry. However, since the prohibition of importation and manufacturing of Halon in Australia,FM-200NAF S-III, and water mist systems have all replaced halon on new vessels. However, older marine vessels can continue using halon where retrofitting of new fire suppression agents is cost-prohibitive and provided they comply with several regulatory measures.

In addition, NAF P-III is a clean non-conductive agent used to protect various potential fire hazards, including electrical and electronic equipment. In short, it is a clean gaseous agent at atmospheric pressure and does not leave a residue. It is colourless and non-corrosive.

Chemical Composition of NAF P-III HCFC Blend C

NAF P-III is composed of the following chemicals

Chemical Identity of the IngredientsMixturesCAS#
2, 2 Dichloro-1, 1, 1-Trifluoroethane (HCFC 123)55 %306-83-2
Isopropenyl-1Methyl cyclohexene4 %811-97-2
Tetrafluoroethane (HCFC 134A)10 %811-97-2
2 Chloro 1, 1, 1, 2-Tetrafluoromethane31 %2837-89-0

Scheduled Extinguishing Agents in Australia

The table below contains the most common scheduled extinguishing agents and their usages in Australia.

Product NameUsesOther names
NAF P-111Typically used as a streaming agent. Above all, it has been used as a replacement for Halon-1211 portable fire extinguishers and land-based applications.HCFC Blend C
NAF S-111Typically used as a total flooding agent and as a replacement for Halon 1301. Therefore, used in marine, commercial fishing, charter boats, ferries, cruise ships, merchant ships, naval vessels, military vehicles, aircraft engines, flammable liquid storage, cold storage facilities, electric switch rooms, data centres and more.HCFC Blend A
– HCFC-123
– HCFC-22
– HCFC-124
FM-200®Functions as a total flooding agent. Therefore, typical applications could include Data Centres, communications facilities, museums, chemical storage areas, clean rooms, laboratories, robotics and emergency power facilities.Heptafluoropropane
FE 227
Halon-1301Typically used as a flooding agent. Requires a halon special permit in Australia. Therefore, used in the aviation, shipping and defence sectors. Halon 1301 can typically be replaced with NAF S-111, requiring only 10% more agent per weight.Bromotrifluoromethane
Halon-1211Typically used as a streaming agent. Requires a halon special permit in Australia. Therefore, used in the aviation, shipping and defence sectors. Halon 1211 can typically be replaced with NAF P-111.Bromochlorodifluoromethane
Freon 12B1

What is a Scheduled Extinguishing Agent?

A Scheduled extinguishing agent is a substance referred to in Schedule 1 of the Ozone Protection and
Synthetic Greenhouse Gas Management Act
 1989, whether existing alone or in a mixture.

If you work with or handle ‘scheduled’ extinguishing agents, you are required by law to hold an appropriate Extinguishing Agent Handling Licence (EAHL).scheduled_agents_fact_sheet.pdf (

Our Company

Fire System products holds an Extinguishing Agent Trading Authorisation (EATA) permit. In addition, our staff hold Extinguishing Agent Handling Licenses (EAHL). Furthermore, we are available to transport and relocate any scheduled extinguishing agents such as FM-200, NAF S-III and NAF P-III that may have Ozone Depleting Substances & Synthetic Greenhouse Gases (ODS & SGG) for our fire industry companies when required. 


NAF P-III® is a Registered Trademark

For more information about NAF P-III HCFC Blend C Fire Agent.