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Sunday, 07 August 2011 00:49

Boranes: 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)

BORON
7440-42-8

polymorphic: alpha-rhombohedral form, clear red crystals; beta-rhombohedral form, black; alpha-tetragonal form, black, opaque crystals with metallic luster; amorphous form, black or dark brown powder; other crystal forms known

2550

2300

10.81

insol

Amorphous, 2.3 g/cm3; alpha-­rhombohedral, ­2.46 g/cm3; ­alpha-­tetragonal, ­2.31 g/cm3; ­beta-rhom­bohedral, ­2.35 g/cm3

@ 2140 °C

580

BORIC ACID, DISODIUM SALT
1330-43-4

powder or glass-like plates; white, free-flowing crystals; light grey solid

1575

741

201.3

2.56 g/100 g

2.367

BORON OXIDE
1303-86-2

rhombic crystals; colourless, semitransparent lumps or hard, white crystals

1860

450

69.6

2.77 g/100 g

1.8 (amorphous); 2.46 (crystalline)

BORON TRIBROMIDE
10294-33-4

colourless liquid

90

-46.0

250.57

reacts

@ 18.4 °C/4 °C

8.6

@ 14 °C

BORON TRICHLORIDE
10294-34-5

12.5

-107

117.16

@ 12 °C/4

4.03

@ 12.4 °C

BORON TRIFLUORIDE
7637-07-2

colourless gas

-99.9

-126.8

67.82

reacts

@ 4 °C

2.4

@ -141 °C. (solid); 760 mm Hg 110.7 °C (liquid)

BORON TRIFLUORIDE ETHERATE
109-63-7

liquid; colourless

125.7

-60.4

141.94

1.3572

64 oc

DECABORANE
17702-41-9

white crystals; orthorhombic crystals; colourless or white crystalline needles

213

99.5

122.21

sl sol

@ 25 °C; liquid: 0.78

4.2

@ 25 °C

80 cc

149

DIBORANE
19287-45-7

colourless gas

-92.5

-165

27.69

sl sol

@ 15 °C

0.96

@ -112 °C

0.8 ll
88 ul

flammable gas

40-50

PENTABORANE
19624-22-7

colourless liquid

60

-46.6

63.2

reacts

@ 0 °C/4 °C

2.2

22.8

0.42 ll
98 ul

30 cc

35

SODIUM PERBORATE
7632-04-4

white, amorphous powder

81.80

SODIUM TETRAHYDROBORATE
16940-66-2

white cubic crystal; white to gray-white microcrystalline powder or lump

400 decomp slowly; 500 decoMelting Point rapidly

36

37.8

v sol

1.07

SODIUM TETRABORATE DECAHYDRATE
1303-96-4

colourless, monoclinic crystals; hard crystals, granules or crystalline powder; white, gray, bluish or greenish white streak, vitreous or dull luster

320

75

381.4

5.92 g/100 g

1.73

TRIETHYLBORANE
97-94-9

colourless liquid

95-96

-92.9

98.00

@ 23 °C

TRIMETHYL BORATE
121-43-7

water-white liquid

67-68

-29.3

103.9

reacts

0.91

3.6

@ 25 º

< 27 cc

 

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Contents

Preface
Part I. The Body
Part II. Health Care
Part III. Management & Policy
Part IV. Tools and Approaches
Part V. Psychosocial and Organizational Factors
Part VI. General Hazards
Part VII. The Environment
Part VIII. Accidents and Safety Management
Part IX. Chemicals
Part X. Industries Based on Biological Resources
Part XI. Industries Based on Natural Resources
Part XII. Chemical Industries
Part XIII. Manufacturing Industries
Part XIV. Textile and Apparel Industries
Part XV. Transport Industries
Part XVI. Construction
Part XVII. Services and Trade
Part XVIII. Guides