Typisk sammensætning af gasfasen

Nitrogen

N₂

73,0

Oxygen

O₂

10,0

Carbondioxid

CO₂

9,5

20-40 mg/cigaret

5000 ppm

Carbonmonoxid

CO

4,2

10-23 mg/cigaret

25 ppm
T

Hydrogen

H₂

1,0

Argon

Ar

0,6

Hydrogencyanid

HCN

0,16

400-500 µg/cigaret

Ammoniak

0,03

50-170 µg/cigaret

25 ppm
T

Nitrogenoxider

NO_x

0,02

50-600 µg/cigaret

NO 25 ppm
NO₂ 3 ppm, 5 ppm L
T

Andet:

1,50

Cadmium

Cd

0,2 ng/sug

Bly

2,7 ng/sug

0,05 mg/m³

C₆H₆

20-50 µg/cigaret

0,5 ppm
HC, H

Methanal
(formaldehyd)

HCHO

5-100 µg/cigaret

0,3 ppm L
C

Ethanal
(acetaldehyd)

0,5-1,2 mg/cigaret

25 ppm L
CT + C

Propanal

CH₂ CH₂ CHO

50-100 µg/cigaret

0,1 ppm
CT

Propanon
(acetone)

CH₃COCH₃

100-250 µg/cigaret

250 ppm
CT

Hydrazin

NH₂NH₂

24-43 ng/cigaret

0,1 ppm
C, H

Methanamin

CH₃NH₂

11,5-29 µg/cigaret

N-nitroso-dimethylamin

(CH₃)₂NNO

2-180 ng/cigaret

C

Vinylchlorid

CH₃CH₂Cl

1,3-16 ng/cigaret

1 ppm
HC

L = Loftværdi, C = Animal carcinogen, CT = Ciliatoksisk, CoC= Cocarcinogen, HC = Human carcinogen, TP = Tumorfremmende, T = Toksisk, H = Optages igennem huden