Sunday, 07 August 2011 06:29

Halogens & Their Compounds: Physical & Chemical Properties

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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)

BROMINE
7726-95-6

dark reddish-brown liquid; reddish-brown vapor; rhombic crystals

58.78

-7.25

159.808

3.58 g/ 100 ml

@ 25 °C/4 °C

@ 15 °C

23.3

BROMINE PENTAFLUORIDE
7789-30-2

colourless liquid; colourless gas above 40.3 °C

40.76

-60.5

174.90

reacts

@ 25 °C

6.05

@ 25.5 °C

CARBONYL FLUORIDE
353-50-4

colourless gas

-83

-114

66.01

reacts

@ 25 °C

2.3

CHLORINE
7782-50-5

greenish-yellow, diatomic gas

-34.6

-100.98

70.906

@ 30 °C

1.4085;6.864 atm

2.5

638

CHLORINE OXIDE
10049-04-4

yellow to reddish-yellow gas at room temp; solid chlorine dioxide is a yellowish-red crystalline mass; liquid is reddish-brown

11

-59

67.46

@ 25 °C and 34.5 mm Hg

@ 0 °C

2.3

10

>10

CHLORINE TRIFLUORIDE
7790-91-2

colourless gas; liquid is yellow-green in colour; solid is white

11.75

-76.34

92.46

reacts

@ 13 °C

3.18

@ -4.9 °C; 740 mm Hg

FLUORINE
7782-41-4

pale yellow; greenish yellow gas

-188.13

-219.61

37.99

reacts

@ -188.2 °C

1.3

@ -223.0 °C; 10 mm Hg

HYDROGEN FLUORIDE
7664-39-3

colourless liquid

20

-83

20.0

misc

@ 19.54 °C

@ 0 °C

@ 2.5 °C

IODINE
7553-56-2

bluish-black scales or plates; diatomic; rhombic, violet-black crystals with metallic luster

184.35

113.50

253.81

@ 25 °C (solid)

6.75 g/l (gas)

@ 38.7 °C (solid)

NITROGEN CHLORIDE
10025-85-1

yellow oil ot rhombic crystals

<71

<-40

120.37

insol cold water, decomposes hot water

1.653

NITROGEN TRIFLUORIDE
7783-54-2

colourless gas

-129

-208.5

71.01

sl sol

@ -129 °C (liquid)

OXYGEN DIFLUORIDE
7783-41-7

colourless gas; yellowish-brown when liquid

-144.8

-223.8

54.00

insol hot water; sl sol and decomposes cold water

@ -233.8 °C (liquid)

1.8

@ -144.6 °C

PERCHLORYL FLUORIDE
7616-94-6

colourless gas

-46.8

-146

102.45

misc

0.637 (gas); 1.434 (liquid)

3.5

1.06

PHOSGENE
75-44-5

colourless gas

8

-118

98.92

sl sol

1.381

3.4

161.6

PHOSPHORUS PENTABROMIDE
7789-69-7

yellow crystalline mass

106 decomp

430.49

decomposes

PHOSPHOROUS TRIBROMIDE
7789-60-8

colourless liquid; pale yellow liquid

173.2

-41.5

270.73

@ 15 °C

@ 47.8 °C

SODIUM HEXAFLUOROSILICATE
16893-85-9

white granular powder

188.05

sol

2.68

SULPHUR CHLORIDE
10025-67-9

light amber to yellowish red oily liquid

135.6

-77

135.03

reacts

@ 15.5 °C/­15.5 °C

4.66

0.906

118 cc

234

SULPHUR DICHLORIDE
10545-99-0

dark red liquid; *reddish brown liquid

59 (decomp)

-78

102.96

@ 15 °C/15 °C

3.55

@ -23 °C

SULPHUR HEXAFLUORIDE
2551-62-4

colourless gas; liquid at -50.5 °C

-63.8 sublimes

-50.8

146.06

sl sol

@ -50 °C (liquid)

5.1

2140

SULPHURYL FLUORIDE
2699-79-8

colourless gas

-55.38

-135.82

102.07

4-5 ml gas/ 100 ml

3.72 g/l (gas), 1.7 g/l (liquid)

3.5

@ 25 °C

 

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