Clean Agent Fire Protection Fluids

Per NFPA 2001, a clean agent is a volatile or gaseous fire extinguisher that is electrically nonconductive and leaves no residue after system discharge. The standard, along with its international equivalent ISO 14520, recognizes two categories: halocarbon agents and inert gas agents. Both are approved for use in occupied spaces, but they extinguish fires through fundamentally different mechanisms.

Halocarbon clean agents are organic compounds with one or more hydrogen atoms replaced by fluorine, chlorine, bromine, or iodine, the halogen elements that give the category its name. The specific halogens a compound carries determine how it extinguishes a fire, and NFPA 2001 recognizes a range of them.

Most halocarbon clean agents extinguish fires primarily by absorbing heat, pulling it out of the fire faster than combustion can generate it. Agents carrying bromine or iodine add a second mechanism: they scavenge the free radicals that propagate the flame, breaking the chain reaction chemically as well as physically cooling it.

Halocarbon clean agents span several chemistry categories, including hydrofluoroolefins and hydrochlorofluorocarbons. The two most widely used are:

• Fluoroketones are ketone compounds with fluorine substituted for hydrogen, stored as a liquid with high vapor pressure. Under system discharge pressure, the fluid releases as a gas and extinguishes fires by absorbing heat at the molecular level, leaving no residue on equipment or surfaces, with a GWP below 1, zero ozone depletion potential, and EPA SNAP approval for use in occupied spaces.
• Hydrofluorocarbons are compounds built from hydrogen, fluorine, and carbon only, with no chlorine or bromine content. They discharge as a gas and extinguish fires by absorbing heat and interrupting the combustion chain reaction. They perform effectively as suppressants but carry substantially higher GWPs and are subject to phase-down regulations in an increasing number of jurisdictions.

FK-5-1-12 is a fluoroketone fire suppressant registered under CAS number 756-13-8. It was developed at 3M™ and commercialized as Novec™ 1230 Fire Protection Fluid. When 3M™ exited the fluorochemical market, the scientists and engineers who built it founded Standard Fluids Corporation™. SF 1230™ Fire Protection Fluid is their FK-5-1-12, produced to meet or exceed the original 3M™ specification.

FK-5-1-12 carries the widest margin of human safety at design concentration of any halocarbon clean agent recognized in NFPA 2001 and ISO 14520, a classification supported by ASHRAE standards, along with a GWP below 1 and zero ozone depletion potential.

By every regulatory definition, including EPA, OECD, and ECHA, yes. Fluorinated compounds like FK-5-1-12 contain a carbon bonded to two or three fluorine atoms, the CF2/CF3 structure that forms the basis of the OECD’s PFAS classification, and Standard Fluids’ fire protection fluids carry that classification.

The PFAS compounds driving most regulatory action, PFOS and PFOA, bioaccumulate because of a specific structure: a long, fully fluorinated carbon chain paired with a polar, acidic end group that lets them dissolve in water and bind to proteins in blood and tissue for years. FK-5-1-12 doesn’t share that structure. 

It lacks the long chain and polar end group that drive bioaccumulation, and separately, it breaks down quickly in the atmosphere, reflected in a GWP below 1 and an atmospheric lifetime measured in days rather than years. Both distinctions, structural and atmospheric, are why FK-5-1-12 falls outside the core of current regulatory concern despite the shared classification.

For the full breakdown of what actually determines PFAS risk, see Standard Fluids’ PFAS guide.

SF 1230™ Fire Protection Fluid and Novec™ 1230 fluid are the same molecule, FK-5-1-12, registered under CAS number 756-13-8. 3M™ exited PFAS manufacturing amid broader regulatory and market pressure on the category, and other manufacturers, including Standard Fluids, now produce FK-5-1-12 in its place. FK-5-1-12 remains a recognized clean agent under NFPA 2001 despite that exit, and systems built around it continue to carry active FM approvals and UL listings.

Standard Fluids Corporation™ was founded by the scientists and engineers who invented FK-5-1-12 at 3M™, and they now produce SF 1230™ to that original specification, with independent laboratory testing confirming chemical identity and purity on every batch as it ships.

Contact the Standard Fluids team directly. We can confirm availability, provide technical documentation, and walk through pricing and supply requirements for your application.