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Ohio Laws and Rules
Where required by Chapter 4121:1-5 of the Administrative Code, the following table to this rule shall be used.
TOXIC CONCENTRATION, FLASH POINT, BOILING POINT, EXPLOSIVE LIMITS AND VAPOR DENSITY OF COMMON FLAMMABLE AND TOXIC LIQUIDS AND GASES
Substance – Threshold Limit Value ppm – Flash Point* øF - Boiling Point øF - Flammable Limits LOWER % – Flammable Limits UPPER % – Vapor Density Air = 1
Acetone 1000 0 – 134 2.6 12.8 2.0
Amyl Acetate 100 77 300 1.1 7.5 4.5
C Benzol (benzene) – skin 10 12 176 1.3 7.1 2.8
n Butyl acetate 150 72 260 1.7 7.6 4.0
n Butyl alcohol (butanol) – skin 50 84 243 1.4 11.2 2.6
Butyl cellosolve (2-butoxy ethanol) 50 141 340 1.1 10.6
Carbon tetrachloride – skin 10 none 170 none none 5.3
Cellosolve (2-ethoxyethanol) 200 104 275 2.6 15.7 3.0
Cellosolve acetate (2-ethoxyethyl acetate) 100 124 313 1.7 — 4.6
Chlorobenzene (monochlorobenzene) 75 85 270 1.3 7.1 3.9
Chloroform (trichloromethane) 10 none 142 none none 4.0
Cyclohexane 300 -4 179 1.3 8.0 2.9
Cyclohexanone 50 111 313 1.1@212øF -- 3.4
1,2-Dichloroethylene 200 43 140 9.7 12.8 3.4
Ethyl acetate 400 24 171 2.2 11.0 3.0
Ethyl alcohol (ethanol) 1000 55 173 3.3 19.0 1.6
Ethyl ether 400 -49 95 1.9 48.0 2.6
Ethylene dichloride (1,2-dichloroethane) 50 56 183 6.2 16.0 3.4
n Heptane 400 25 208 1.0 6.7 3.5
n Hexane 100 -22 156 1.1 7.5 3.0
Methane – Gas -259 5.3 14.0 0.6
Methyl acetate 200 14 140 3.1 16.0 2.8
Methyl alcohol (methanol)-skin 200 52 147 6.7 36.0 1.1
Methyl butyl ketone (2-hexanone)-skin 25 79 262 1.2 8.0 3.5
Methyl cellosolve (2-methoxyethanol)-skin 25 105 255 2.5 14.0 2.6
Methyl cellosolve acetate-skin 25 111 292 1.7 8.2 4.1
Methyl chloroform (1,1,1 trichloroethane) 350 -** 165 10.5 15.5 4.6
Methyl ethyl ketone (2-butanone) 200 21 176 1.8 10.0 2.5
Methyl isobutyl ketone (hexone)-skin 100 73 244 1.4 7.5 3.5
Methyl propyl ketone (2-pentanone) 200 45 216 1.5 8.2 3.0
Methylene chloride (dichloromethane) 100 none 104 – - 2.9
Natural Gas – Gas – 3.8-6.5 13-17 -
Perchloroethylene (tetrachloroethylene)-skin 100 none 249 – - 5.7
Petroleum distillates Naphtha – under 100 212-320 0.9 6.0 4.3
Safety solvent – 100 & over 300-400 0.8 5.0 -
C Isophorone 5 184 419 0.8 3.8 4.8
Isopropyl acetate 250 40 194 1.8 8.0 3.5
Isopropyl alcohol – skin 400 53 181 2.0 12.0 2.1
Styrene monomer (phenylethylene) 100 90 295 1.1 6.1 3.6
Toluol (toluene)-skin 100 40 232 1.2 7.1 3.1
Trichloroethylene 100 90 189 12.5 90.0 4.5
Turpentine 100 95 300 0.8 – 4.7
Xylol (xylene)-skin 100 63 291 1.1 7.0 3.7
*Closed Cup (The temperature at which a vapor will ignite if it is in a closed container in contrast to an open container.)
**Non-flammable under ordinary conditions of temperature and pressure
FLASH POINT – is the temperature at which vapors given off by flammable solvent will burn with a flash but will not continue to burn until more solvent has evaporated.
LOWER EXPLOSIVE LIMIT – is the lowest concentration of flammable vapor that will “flash” when ignited. The energy of the explosion is at a minimum because the mixture is “lean”.
UPPER EXPLOSIVE LIMIT – is the richest concentration of vapors that will flash when ignitied. The energy of the explosion is low because the mixture is too “rich”. Concentrations of vapors above or below the explosive limits will not burn.
VAPOR DENSITY – is the weight of the vapors of a solvent compared with air. For example, all flammable solvent vapors are heavier than air and will tend to fall to the floor and accummulate in low places. Some gases are lighter than air and will rise – example, methane.
HISTORY: Eff 1-1-86
Rule promulgated under: RC Chapter 119.
Rule authorized by: RC 4121.13
Rule created by: Const. Art. II. Sec. 35
119.032 Review Date: 3-1-03