Chemical Name
CAS-Number

Colour/Form

Boiling Point (°C)

Melting Point (°C)

Molecular Weight

Solubility in Water

Relative Density (water=1)

Relative Vapour Density (air=1)

Vapour Pressure/ (Kpa)

Inflam.
Limits

Flash Point (°C)

Auto Ignition Point (°C)

ANTHRACENE
120-12-7

monoclinic plates from alcohol recrystallization; when pure, colourless with violet fluorescence; when crystallized from benzene, colourless, lustrous plates are formed which exhibit a blue fluorescence; yellow crystals with blue fluorescence

342

218

178.22

insol

@ 25 °C

6.15

@ 145 °C

0.6 ll
? ul

121 cc

540

BENZ(a)ANTHRACENE
56-55-3

colourless/ plates recrystallized from glacial acetic acid or alcohol

400

162

228.3

@ 25 °C

5x10^{- 9} torr

BENZO(g,h,i)FLUOR­ANTHENE
203-12-3

crystals

149

insol

<10 Pa

BENZO(g,h,i)PERYLENE
191-24-2

large, pale yellow-green plates (recrystallized from xylene)

550

277

276.3

insol

@ 25 °C

BENZO(k)FLUORAN­THENE
207-08-9

pale yellow needles from benzene

480

217

252.3

insol

9.59x10^{- 11} torr

BENZO(a)PYRENE
50-32-8

pale yellow monoclinic needles from benzene & methanol; crystals may be monoclinic or orthorhombic; yellowish plates (from benzene and ligroin)

>360

179-179.3

252.30

insol

1.351

8.7

>1 mm Hg

BENZO(b)FLUORANTHENE
205-99-2

needles (recrystallized from benzene), colourless needles (recrystallized from toluene or glacial acetic acid)

168

252.3

insol

<10 Pa

CHRYSENE
218-01-9

red blue fluorescent rhombic plates from benzene, acetic acid; orthorhombic bipyramidal plates from benzene; colourless platelets with blue fluorescence

448

255-256

228.28

insol

1.274

6.3x
10^{- 7} mm Hg

DIBENZ(a,h)ACRIDINE
226-36-8

yellow crystals

228

279.35

DIBENZ(a,h)ANTHRA­CENE
53-70-3

colourless plates or leaflets recrystallized from acetic acid; solution in concentrated sulfuric acid is red; crystals may be monoclinic or orthorhombic

524

266

278.33

insol

1.282

1x
10^{- 10} mm Hg

DIBENZ(a,j)ACRIDINE
224-42-0

yellow needles or prisms

216

279.35

DIBENZO(a,e)PYRENE
192-65-4

pale yellow needles in xylene; yellow-red in concn sulfuric acid solution

234

302.4

DIBENZO(a,h)PYRENE
189-64-0

golden yellow plates from xylene or trichlorobenzene; in
H₂SO₄ solution has red colour, changing later into violet or blue

308

302.38

DIBENZO(ai)PYRENE
189-55-9

greenish-yellow needles, prisms or lamellae

@ 0.05 mm Hg

281

302.4

2.39x
10^{- 14} mm ­Hg

DIBENZOFURAN
132-64-9

leaf or needles from alcohol; white crystals; crystalline solid

287

168.19

@ 25 °C

@ 99 °C/4 °C

5.8

@ 25 °C

FLUORANTHENE
206-44-0

coloured needles; pale yellow needles or plates from alcohol

375

111

202.2

insol

@ 0 °C/4 °C

0.01 mm Hg

NAPHTHACENE
83-32-9

white needles; orthorhombic bipyramidal needles from alcohol

279

95

154.21

insol

1.0242 at 90 °C/4 °C

5.32

10 mm Hg at 131.2 °C

PHENANTHRENE
85-01-8

monoclinic plates from alcohol; colourless shining crystals; leaflets

340

101

178.22

insol

@ 4 °C

6.15

@ 118.2 °C

171 oc

PYRENE
129-00-0

monoclinic prismatic tablets from alcohol or by sublimation; pure pyrene is colourless; pale yellow plates (when recrystallized from toluene); colourless solid (tetracene impuritites give yellow colour)

393

156

202.2

insol

@ 23 º C

@ 20 º C