Table still in progress 12/10/09

122
material*

LC50
ppm
IDLH**

cut-off***
I
II
III
NR
  
acetyl fluoride
 
 
 
3251.5
65.03
  
ammonia
4000
 
 
 
4000
80
 Baker MSDS A5472 07/29/03 rat inh 4h 2000 ppm
antimony hydride
20
5
 1% (1000 ppm)
20
10
0.67
0.40
 see stibine below
arsenic pentafluoride
~1.5
5 mg As/m3
 0.075% (750 ppm)
20
10
0.67
0.40
  1.5 calculated from IDLH (just converted to ppm)
arsine
<0.9
3
 0.045% (45 ppm)
20
10
0.67
0.40
 link   0.9 ppm is calc value from 15 min rat inh LC50 0.3 mg/m3
 Air Liquide MSDS gives 20 ppm (1 h) LC50 with no other info.
BOC gas MSDS says 390 mg/m3/10M rat LC50
2-butene
 
 
1398.3
46.61
27.97
  
boron trichloride
2541
 
 
2541
84.70
50.82
 link  DOES NOT SAY 1 h
RTECS data clear 2541 ppm is 1 h rat inh LC50
boron trifluoride
875
25
 43.7%
 
806
26.87
16.12
 TOXNET LC50 Rat inhalation 1.21 mg/L/4 hr
RTECS data says 1180 mg/m3/4h   Those are very close.  The 875 is calculated based on the lewer of the two.
bromine chloride
 
 
290
9.67
5.80
 have searched RTECS, Toxnet (there is a Fact sheet from 1988, purchasable but probably not helpful).  The use of this seems to be focused entirely on wastewater treatment and poliovirus pesticide activity.
carbon monoxide
3614
1200
  
 
 
3760
75.2
 link  1807 ppm/4 hour(s) inhalation-rat LC50 RTECS gives same data
carbonyl chlorofluoride
45 ppm
 
class II

53.33
32.00
 TGO assigned, failing tox data availability
carbonyl fluoride
360
18%
 
360
12.00
7.20
 link  360 ppm/1 hour(s) inhalation-rat LC50
carbonyl sulfide
2140
 
 
2220
740
44.4
 link  1070 ppm/4 hour(s) inhalation-rat LC50m  RTECS agrees
chlorine
293
10
 14.6%
 
 
9.77
5.86
link  293 ppm/1 hour(s) inhalation-rat LC50
chlorine dioxide
5
 200 ppm
 
250
8.33
5.00
 link (toxnet) gives much animal data but mostly aquatic.
chlorine monoxide
50 ppm
class I
50.00
3.33
2.00
 TGO assigned, failing tox data availability
chlorine pentafluoride
122
6.1%
 
 
 
not in TGO
link (toxnet, might have to re-search, the links seem to "expire")
chlorine trifluoride
299
20
 14.95%
 
299
9.97
5.98
 link  299 ppm/1 hour(s) inhalation-rat LC50
chlorosilane
2080
 
 
class II
53.33
32.00
 link
chlorotrifluoroethylene
 
 
2000
66.67
40
  
coal gas
 
 
 
 
not in TGO
RTECS, not much tox data, appears to be quite bad.
cyanogen
350
17.5%
 
350
11.67
7.00
 link  350 ppm/1 hour(s) inhalation-rat LC50
cyanogen chloride
1.26
 
80
40
2.67
1.60
 RTECS 3150 μg/kg rabbit LD50
link 6 mg/kg oral-cat LD50
diborane
80
15
  
 
 
 
 
 link  40 ppm/4 hour(s) inhalation-rat LC50
deuterium bromide
 
 
300
10.00
6.00
  
deuterium chloride
 
 
 
3120
62.40
  
deuterium iodide
 
 
class II
53.33
32.00
  
deuterium sulfide
 
 
710
23.67
14.20
  
diazomethane
2
  
20
10.00
0.67
0.40
 from TGO, IDLH
dichloroacetylene
438
 
153.1
76.56
5.10
3.06
 link gives 4h rat LC50 for mixtures
dichlorosilane
215
 
 
314
10.47
6.28
 RTECS (time not stated)
dinitrogen tetroxide
 
115
57.50
3.83
2.30
 see nitrogen dioxide.  They are in equilibrium.
diphosgene
 
2
1.00
0.07
0.04
  
ethyl nitrite
 
 
320
10.67
6.40
  
ethylene oxide
2924
800
  
 
 
4350
87.00
 RTECS 800 ppm 4H rat inh LC50
toxnet says 1462 4H rat inh LC50
fluorine
185
25
  
185
92.50
6.17
3.70
 link  185 ppm/1 hour(s) inhalation-rat LC50
formaldehyde
784
20
  
165.7
82.84
5.52
3.31
 toxnet says 0.48 mg/l (4 hr) rat which is 784 ppm 1h rat
germane
441
 
 
622
20.73
12.44
 link  1380 mg/m3 inh-rat LC50;     1250 mg/kg oral-mouse LD50
hexaethyl tetraphosphate
 
 
 
 
 

RTECS gives oral rat LD50 = 7 mg/kg
(not a gas?) (not in TGO)

hexafluoroacetone
468
 
 
470
15.67
9.4
 RTECS has 275 ppm as 3h rat inh LC50
1,3-hexafluorobutadiene
667
 
184.2
92.08
6.14
3.68
 link
hexafluoropropene
 
 
 
3659.7
73.19
  
hydrogen bromide
2858
30
  
 
2860
95.33
57.20
 link  2858 ppm/1 hour(s) inhalation-rat LC50
hydrogen chloride
3124
50
  
 
2810
93.67
56.20
 link  3124 ppm/1 hour inh-rat LC50;         900 mg/kg oral-rabbit LD50
hydrogen cyanide
112
50
  
40
20.00
1.33
0.80
 link   160 ppm/30 min inh-rat LC50;    3700 ug/kg oral-mouse LD50
hydrogen fluoride
1347
30
  
 
1300
43.33
26.00
 link  1100 mg/m3/60 minute(s) inhalation-rat LC50
hydrogen iodide
 
 
2860
95.33
57.20
 not much tox reports, It seems to be of little interest for its toxicity.
hydrogen selenide
2.2
1
  
60
30.00
2.00
1.20
 link  300 ppb/8 hour(s) inhalation-guinea pig LC50, RTECS confirms
hydrogen sulfide
444
100
  
 
712
23.73
14.24
 link  444 ppm inhalation-rat LC50  (doesn't say 1 h)   another link
ketene
5
  
 
535.1
17.84
10.70
  
methyl bromide
846
250
  
 
1007
33.57
20.14
 link oral rat LD50 214 mg/kg
RTECS gives 302 ppm/8h rat LC50 and rat oral LD50 = 214 mg/kg
methyl chloride
5143
2300
  
 
 
 
 
 link IHL-RAT LC50 5300 mg/m3/4h
RTECS confirms and gives oral rat LD50 = 1800 mg/kg
methylchlorosilane
 
 
600
20.00
12.00
 not a lot of Tox data, RTECS gives some, no LC50 or LD50.  It is apparetnly not an acute toxin of the same league.
methyl mercaptan
675
150
  
 
1350
45.00
27.00
 link Ihl-rat 675 ppm (one h?)  another link
mustard gas
 
4
2.00
0.13
0.08
 not actually a gas at standard conditions
nickel carbonyl
24.5
2
  
 
 
 
 
 link  35 ppm/30 min inhalation-rat LC50.  not in TGO
nitric oxide
(nitrogen monoxide)
1739
100
  
115
57.50
3.83
2.30
 link IHL-RAT LC50 1068 mg/m3/4h, also reported in RTECS
link 160 mg/m3 inhalation-rat LC50, value also reported in RTECS
nitrogen dioxide
176
20
  
115
57.50
3.83
2.30
 link rat 4h inh 88 ppm
nitrogen oxide
(nitrous oxide)
 
 
 
 
 
 THIS is not a poison gas.  It is "laughing gas," still used as a dental anesthetic, and it has been added to this table simply to make a point about how similar the names can look.
nitrogen trifluoride
6700
1000
  
 
 
 
 
 link 6700 ppm/1 hour(s) inhalation-rat LC50, also in RTECS
nitrogen trifluoride oxide
48
 
 
 
 
 
 RTECS gives 24 ppm 4 h rat inh LC50
nitrogen trioxide
 
 
 
3350
67.00
 nothing in RTECS, little elsewhere, not finding tox data.  "Delayed effects."
nitrosyl chloride
35
 
 
class II
53.33
32.00
 link Air Liquide MSDS gives 35 ppm (1 h) LC50 with no other info.
oil gas
 
 
 
 
 
 We will assume it's very bad and research it more thoroughly it it ever comes up.
oxalyl bromide
 
class II
53.33
32.00
  
oxygen difluoride
2.6
0.5
  
3
1.50
0.10
0.06
 NIOSH RTECS
ozone
9.6
5
  
9
4.5

0.30
0.18
 BOC 1997 msds says 4800 ppb 4 H rat inh which is pretty low
perchloryl fluoride
770
100
  
 
770
25.67
15.40
 NIOSH RTECS gives 385 ppm/4 hour rat inh LC50
perfluoroisobutylene
1.47
 
1.2
0.61
0.04
0.02
 BOC msds of mixture gives LC50 for this component as 1.05 ppm rat ihn 2 h
phosgene note
4
2
  
5
2.50
0.17
0.10
 link
phosphine
22
200
  
20
10.00
0.67
0.40
 link 11 ppm/4 hour(s) inhalation-rat LC50
phosphorus pentafluoride
190
 
 
260
8.67
5.20
 Air Liquide MSDS gives 190 ppm (1 h) LC50 with no other info.
selenium hexafluoride
50
2
  
50
25.00
1.67
1.00
 Air Liquide MSDS gives 50 ppm (1 h) LC50 with no other info.
RTECS gives only LCLOs, but it looks unpleasant.
silicon tetrafluoride
450
 
 
2272
75.73
45.44
 Air Liquide MSDS gives 450 ppm (1 h) LC50 with no other info.
RTECS gives 2250 ppm, no time.
stibine
20
5
  
20
10
0.67
0.40
 Air Liquide MSDS gives 20 ppm (1 h) LC50 with no other info.
RTECS -- all refs are LCLO, but they are pretty low. 
sulfur dioxide
2520
100
  
 
2520
84.00
50.40
 Air Liquide MSDS gives 2520 ppm (1 h) LC50 with no other info.
sulfur pentafluoride
1
  
10
5.00
0.33
0.20
 No rat inh data found.  10 is the IDLH according to TGO
sulfur tetrafluoride
40
 
40
20.00
1.33
0.80
 Air Liquide MSDS gives 40 ppm (1 h) LC50 with no other info.
sulfuryl fluoride
3020
200
  
 
 
3020
60.40
 Air Liquide MSDS gives 3020 ppm (1 h) LC50 with no other info.
tellurium hexafluoride

25

1
  
25
12.5
0.83
0.50
 Source of 25 ppm not known came from.  RTECS only gives LCLO values, very low.  OSHA tech bulletin also gives no LC50.  NIOSH RTECS too
trifluoroacetyl fluoride
 
 
1000
33.33
20.00
 tox info is elusive so far
trifluorochloroethylene
2000
 
 
 
 
 
 NIOSH RTECS reports rat 4 h inh LC50 is 1000 ppm
bis(trifluoromethyl)peroxide
 
10
5
0.33
0.20
  
tungsten hexafluoride
150
 
 
217
7.23
4.34
 217 link   Air Liquide MSDS gives 160 ppm (1 h) LC50 with no other info.
vinyl chloride
 
 
 
 
NR
 Oxford msds says rat LD50 is 500 mg/kg, which is the upper limit of toxic.  RTECS gives rat 15 min LC50 of 18 pph.

*Reference is to material which is a compressed or liquefied gas or gas mixture obtained in cryo-freezers, cylinders, lecture bottles, or other gas containers.  Does not apply liquid mixtures, e.g. BF3 etherate, nor aqueous NH3, HCl, HBr....
** IDLH is given as ppm unless otherwise indicated.
*** Cut-off concentration:  If concentration of toxic gas in any two-component mixture compressed gas cylinder is LESS THAN this amount, the requirement for sprinklered, continuously ventilated cabinet does not apply.