CALCULATED NUMBER OF CIGARETTES REQUIRED TO REACH A THRESHOLD LIMIT FROM ETS IN A SEALED, UNVENTILATED 100m3 ENCLOSURE AT STP (1)
 
ETS Component CAS Number Molecular Weight ETS Output (mg/cigarette)(2) Threshold Limit (ppm) Threshold Limit (mg/m3) Cigarettes Required
2-Toluidine (3 isomers) (3) 107.15 0.003 2 8.7 290,000
Acetaldehyde 75-07-0 44.05 1.26 111 180 (4) 14,285
Acetic acid 64-19-7 60.05 1.5 10 25 1,666
Acetone 67-64-1 58.05 1 500 1187 118,700
Benzene 71-43-2 78.11 0.24 1 3.1 (5) 1,290
Benzo[a]Pyrene 50-32-8 252.30 0.00009 0.02 0.2 (6) 222,000
Cadmium 7440-43-9 112.40 0.0007 0.002 0.01 1,430
Catechol 120-80-9 110.11 0.14 5 22 15,700
Dimethylamine 124-40-3 45.08 0.036 10 (7) 9.2 25,555
Formic acid 64-18-6 46.02 0.525 5 (8) 9.4 1,790
Hydrazine 302-01-2 32.05 0.00009 0.01 0.013 14,444
Hydroquinone 123-31-9 110.11 0.16 0.4 2 1,250
Methylamine 74-89-5 31.09 0.1 5 13 13,000
Methylchloride 74-87-3 50.49 0.88 50 103.0 11,170
Nickel 7440-02-0 58.71 0.0025 0.4 1 40,000
Phenol 108-95-2 94.11 0.25 5 19 7,600
Polonium 210 (9) 210 0.4pCi na 3pCi/liter (10) 750,000
Pyridine 110-86-1 70.01 0.39 5 16 4,100
Toluene 108-88-3 92.13 0.000035 50 375 1,000,000
These calculations are not complex.  They assume a 100m3 enclosed and unventilated space at Standard Temperature and Pressure.  STP assumes 24.45 = molar volume of air in liters at STP conditions (25oC. and 760 torr).  Conversion equations are as follow:

                          (TLV in ppm)(gram mol wt of substance)                            (TLV in mg/m3)(24.45)
TLV in mg/m3 =  ______________________________      TLV in ppm =  ___________________
                                         24.45                                                                   gram mol wt of substance

1.  Limits expressed in ppm have been translated to mg/m3 for the sake of clarity and volume calculation.  New values have been incorporated, and the lowest threshold (irrespective of source) has been used.  Unless otherwise noted, lowest threshold limit values were found in “1999 TLVs and BEIs,” American Conference of Governmental Industrial Hygienists.
2.  Data from NTP RoC ETS, December 2-3, 1998, Table 1-1, pp 1-3, per EPA.
3.  Three isomers o-Toluidine [95-53-4], m-Toluidine [108-44-1], p-Toluidine [106-49-0].  Mol wt for each is 107.15, TWA/TLV is 2 ppm for each.
4.  OSHA, PEL-TWA has been raised to 200ppm, vacating a previous lower level of 180 mg/m3.  I used the lower limit.
5.  This calculation based on the lowest possible calculated OSHA/NIOSH threshold of 1 ppm.
6.  Based on coal tar pitch volatiles [65996-93-2], as benzene solubles
7.  OSHA PEL
8.  NIOSH PEL-TWA, and HSDB
9.  “Levels of polonium-210 in tobacco smoke are not believed to be great enough to significantly impact lung cancer”  Hecht S, Tobacco smoke carcinogens and lung cancer. JNCI 1999;91:1194-1210.
10.  EPA (1990c).