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Is sevoflurane harmful to the human body? Is it toxic?

Edit:Jiangsu Yongtai Fire Engineering Co., Ltd.UpDate:2019-12-06

First let's find out what is sevoflurane?

Heptafluoropropane (HFC-227ea / FM200) is a clean gas chemical fire extinguishing agent mainly based on chemical fire extinguishing and physical fire extinguishing; the chemical formula is CF3-chf-CF3, or C3HF7, with a melting point of 131 ° C and a boiling point of 16.4 ° C. Slightly soluble in water (260mg / L).

Is sevoflurane toxic?

According to "Code for Design of Gas Fire Extinguishing System" GB50370-2005, "Code for Construction and Acceptance of Gas Fire Extinguishing System" GB50263-2007 states that "Heptafluoropropane is a better product that currently replaces halon fire extinguishing systems. Its potential for depleting the ozone layer The value ODP = 0, the greenhouse effect potential GWP = 0.6, the remaining life in the atmosphere ALT = 31 (years), the non-toxic reaction concentration of the fire extinguishing agent NOAEL = 9%, the basic concentration of the fire extinguishing design C = 8%, and it has good cleanability ( Fully vaporized in the atmosphere without leaving any residue), good gas phase electrical insulation and good physical properties suitable for use in fire extinguishing systems. "So heptafluoropropane fire extinguishing agent will not cause damage to property and precision facilities, and has a short shelf life in nature , Fire extinguishing efficiency is high and non-toxic at a certain design concentration, which is suitable for protected areas where staff are resident.

Its characteristics are:

(1) Heptafluoropropane fire extinguishing agent can reliably extinguish Class B and C fires and electrical fires with a low fire extinguishing concentration;

(2) Small storage space, high critical temperature, low critical pressure, liquefiable storage at normal temperature;

(3) It does not contain particles or oily residues after release, and has no destructive effect on the atmospheric ozone layer (ODP value is zero). The residence time in the atmosphere is 31 to 42 years, which meets environmental protection requirements.

(4) Heptafluoropropane has no harm to the human body in the state of no fire in the range of the designed concentration! (The design standard is generally 10%, and the toxic response is 10.5%).

Heptafluoropropane gas fire extinguishing system

But you need to know the following:

One is the toxicity of heptafluoropropane itself. When the concentration is above 10%, discomfort will appear, and it will be life-threatening for a long time.

The second is that although heptafluoropropane is relatively stable at room temperature, it still decomposes at high temperatures and produces hydrogen fluoride, which produces an acrid taste. Other combustion products include carbon monoxide and carbon dioxide.

Third, the toxic gas that may be generated by the burning of materials in the protected area is also unpredictable.

In summary: Heptafluoropropane fire extinguishing agent is normally used in workplaces that are safe and non-toxic under normal designed fire extinguishing concentrations.It can be used to protect electronic equipment, precision instruments and valuables, such as information room, telecommunications and communication facilities, important Cultural relics, etc. However, it is used in places with frequent people, and when the concentration may exceed 10.5%, personnel must be evacuated within 1 minute; generally, the concentration of heptafluoropropane in the protection zone should not exceed 9.0%. Therefore, when the sevoflurane gas fire extinguishing system is set in the key protection area, a professional company should be designed to ensure the safety of personnel and property.