Perfluorohexanone fire extinguishing agent has the characteristics of low toxicity or even non-toxicity, and its fire extinguishing concentration is much lower than< /span>NOAEL value, so the security is high. The comparison with the fire extinguishing concentration of halon fire extinguishing agent and its substitutes is shown in the following table:
Project Name
perfluorohexanone
Halon 1301
Halon 1211
HFC- 227ea< /span>
HFC- 236fa< /span>
Extinguishing Concentration(%)
4-6
5
6~7
7.5-8.7
15
NOAEL(%)
>10
5
1
9
10
LOAEL ( %)
>10
7.5
2
10.5
15
4h-LC50(%)
>10
>80
20
>80
>80
Note: NOAEL: No visible adverse effect concentration; LOAEL: visible adverse effect concentration; 4h-LC50 < span style="font-size:12px;color:#000000;">(%): Experiment 4 within hours , killing half of the animals tested
From the table, it can be seen that the NOAEL of perfluorohexanone fire extinguishing agent About twice its fire extinguishing concentration, the safety margin is large; and the NOAEL of HFC-227ea is slightly higher than its fire extinguishing concentration, and the safety margin is small;Halon1301's NOAEL is very close to its fire extinguishing concentration, and there is no safety margin; HFC-236fa's NOAEL is less than its fire extinguishing concentration, which is dangerous to humans. Therefore, the perfluorohexanone clean liquid fire extinguishing agent is more suitable for people's places while ensuring the fire extinguishing efficiency.
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