Friday, 12 August 2011 00:10

Sulphur Compounds, Inorganic: 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)

AMMONIUM PERSULPHATE
7727-54-0

white crystals

120 decomp

228.19

v sol

1.98

AMMONIUM SULPHAMATE
7773-06-0

crystals (large plates); colourless, white crystalline substance; brownish-gray; bright yellow-orange crystalline solid

131

114.13

@ 10 °C; 2.16 kg/ kg

>1 (solid)

AMMONIUM SULPHATE
7783-20-2

colourless rhombic crystals; orthorhombic crystals or white granules; brownish gray to white crystals according to degree of purity

132.14

sol

@ 50 °C

AMMONIUM SULPHIDE
12124-99-1

yellow crystals

decomp

68.14

v sol

CALCIUM SULPHATE
7778-18-9

natural anhydrite crystals are colourless, rhombic or monoclinic; natural anhydrite crystals are orthorhombic, colour varies (white with blue, gray or reddish tinge, or brick red); insol anhydrite has same crystal structure as mineral anhydrite

1193

1450

136.14

sl sol

2.960

CALCIUM SULPHIDE
1344-81-6

deep orange malodorous liquid

@ 15.6 °C

CARBON DISULPHIDE
75-15-0

mobil liquid; clear, colourless or faintly yellow liquid

46.5

-111.5

76.14

0.2 g/100 ml

1.2632

2.67

@ 25 °C

1.3 ll
50 ul

-30 cc

90

CARBONYL SULPHIDE
463-58-1

colourless gas

-30

-138

60.08

1220 mg/l at 25 °C

@ 17 °C/4 °C

2.1

9412 mm Hg at 25 °C

12% ll
29% ul

HYDROGEN SULPHIDE
7783-06-4

colourless gas

-60.33

-85.49

34.08

1 g /242 ml

@ 0 °C;1.19 (gas)

1.189

@ -60.4 °C

4.3 ll
45 ul

260

POTASSIUM PERSULPHATE
7727-21-1

colourless, triclinic crystal; white crystal

270.3

@ 0 °C; 5.2 g/100 cc

2.47

POTASSIUM PYROSULPHITE
16731-55-8

white crystals or crystalline powder; colourless, monoclinic plates

190 decomp

222.32

v sol

2.34

POTASSIUM SULPHIDE
1312-73-8

white cubic crystals or fused plates; red or yellow-red crystalline mass or fused solid

912

110.26

v sol

@ 14 °C

SODIUM BISULPHITE
7631-90-5

white crystal or crystalline powder; granular powder; white, monoclinic

104.07

3.5 parts in cold, 2 parts in boiling

1.48

SODIUM HYDROSULPHITE
7775-14-6

white or grayish-white crystalline powder

176.10

SODIUM METABISULPHITE
7681-57-4

white crystals or white to yellowish crystalline powder

150 decomp

190.13

@ 100 °C

1.4

SODIUM SULPHATE
7757-82-6

white powder or orthorhombic bipyramidal crystals; monoclinic crystals from 160-185 °C

888

142.06

sol in about 3.6 parts

2.671

SODIUM SULPHIDE
1313-82-2

clear crystals; yellow or brick-red lumps or flakes; cubic crystals or granules; amorphous, yellow-pink or white crystals

1180

78.05

18.6 g/100 g

@ 14 °C/4 °C

SODIUM SULPHITE
7757-83-7

small crystals or powder; white powder or hexagonal prism

128.06

sol in 3.2 parts

@ 15.4 °C

SODIUM THIOSULPHATE
7772-98-7

powder; colourless monoclinic crystals

158.13

50 g/100 ml

1.667

SULPHUR BROMIDE
13172-31-1

yellow liquid

54

- 40

223.93

decomposes

2.63

SULPHUR DIOXIDE
7446-09-5

colourless liquid or gas

-10

-72.7

64.07

@ 25 °C

2.927 g/l (gas); 1.434 (liquid)

2.2

330

SULPHUR TETRAFLUORIDE
7783-60-0

gas

- 40

- 124

108.05

decomposes

SULPHUR TRIOXIDE
7446-11-9

alpha-form, asbestos-like needles; beta-form, asbestos-like neeedles; gamma-form, ice-like mass or liquid

80.07

sol in 100 parts

@ 25 °C

SULPHUR
7704-34-9

orthorhombic, cycloocta or alpha-sulphur, amber coloured crystals; monoclinic, cycloocta or beta-sulphur, light-yellow, opaque, brittle, needle-like crystals; sublimed & washed sulphur are in form of fine, yellow crystalline powder

444.6

112-120

32.06

insol

2.1

@ 32 ºC

@ 30.4 °C

35 mg/l ll
1400 ul

207

232

SULPHURYL CHLORIDE
7791-25-5

colourless, mobile liquid

69.3

-54.1

134.98

1.6674

4.7

@17.8 °C

THIONYL CHLORIDE
7719-09-7

colourless to pale yellow or reddish liquid; colourless to pale yellow, fuming, refractive liquid

76

-104.5

118.98

1.638

4.1

@ 26 °C

 

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