Chemical Name
CAS-Number

Colour/Form

Boiling Point (ºC)

Melting Point (ºC)

Molecular Weight

Solubility in Water

Relative Density (water=1)

Relative Vapour Density (air=1)

Vapour Pressure/ (Kpa)

Inflam.
Limits

Flash Point (ºC)

Auto Ignition Point (ºC)

ACETIC ACID
64-19-7

rhombic crystals (<16.6 ºC melting point); colourless liquid (16.6 ºC melting point)

118

16.6

60.05

misc

1.0492

2.1

1.6

4 ll
16 ul

39 cc

426

ACETIC ANHYDRIDE
108-24-7

colourless, very mobile, strongly refractive liquid

139

-73

102.10

v sol

@ 15 ºC

3.5

0.5

2.9 ll
10.3 ul

49 cc

316

ACETYLSALICYLIC ACID
50-78-2

monoclinic tablets or needle-like crystals

135

180.15

sl sol

1.40

@ 25 ºC

ACRYLIC ACID
79-10-7

colourless liquid

141

14

72.06

misc

1.0511

2.5

0.413

2.9 ll
8 ul

54 oc

360

ADIPIC ACID
124-04-9

monoclinic prisms from ethyl acetate, water, or acetone and petroleum ether; fine white crystals or powder

337.5

152

146.14

sl sol

@ 25 ºC/4 ºC

5.04

@ 18.5 ºC

10 ll
15 mg/l ul

196 cc

422

L-ASCORBIC ACID
50-81-7

crystals (usually plates, sometimes needles, monoclinic system); white to slightly yellow crystals or powder

190-192

176.12

v sol

@ 25 ºC

BENZOIC ACID
65-85-0

monoclinic tablets, plates, leaflets; white scales or needle crystals

249.2

122.4

122.13

@ 20 ºC

@ 15 ºC/4 ºC

4.21

@ 96 ºC

121 cc

570

BUTYRIC ACID
107-92-6

oily liquid; colourless liquid

165.5

-7.9

88.10

misc

0.9577

3.0

0.43 mm Hg

2.0 ll
10.0 ul

72 cc

443

BUTYRYL CHLORIDE
141-75-3

colourless liquid

101-102

-89

106.55

slowly with decompo­sition

@ 20.6 ºC/4 ºC

< 21

n-CAPROIC ACID
142-62-1

oily liquid

205.8

-3.4

116.16

insol

0.929

4.01

0.024

1.3 ll
9.3 ul

102 oc

380

CHLORENDIC ACID
115-28-6

crystalline solid

388.84

CHLOROACETIC ACID
79-11-8

monoclinic prisms; colourless or white crystals; colourless to light-brownish crystals

189

(alpha) 63 ; (beta) 55-56 ; (gam­ma) 50

94.50

v sol

1.6

3.26

@ 43 ºC

8.0 ll
? ul

126

>500

o-CHLOROBENZOIC ACID
118-91-2

monoclinic prisms from water

sublimes

142

156.6

sol

1.544

@ 25 ºC

m-CHLOROBENZOIC ACID
535-80-8

crystals; prisms from water

sublimes

158

156.6

v sol

@ 25 ºC/4 ºC

@ 25 ºC

p-CHLOROBENZOIC ACID
74-11-3

triclinic prisms from alcohol and ether; nearly white coarse powder

243

156.6

insol

@ 25 ºC

2-CHLOROPROPIONIC ACID
598-78-7

crystals

186

-12.1

108.53

misc

1.2585

CITRIC ACID
77-92-9

crystals/monoclinic holohedra/crystallize from hot concentrated aq soln; colourless, translucent crystals or white, granular to fine crystalline powder/ rhombic crystals from water with 1 mol of water of crystallization

decomp

153

192.12

v sol

1.665

0.28 ll
2.29 ul

CITRIC ACID HYDRATE
5949-29-1

crystals

decomp

100

sol

1.5

0.28 ll
2.29 ul

1010

CROTONIC ACID
3724-65-0

monoclinic needles or prisms (from water or petroleum ether); colourless needle-like crystals; white crystalline solid

185

71.5-71.7

86.09

v sol

@ 15 ºC/4 ºC; 0.964

2.97

0.024

88

396

DICHLOROACETIC ACID
79-43-6

colourless liquid

194

9.7

128.94

misc

1.56

4.45

0.019

2,4-DICHLOROPHENOXY­ACETIC ACID
94-75-7

white to yellow crystalline powder; yellow colour is phenolic impurities; colourless powder; white

@ 0.4 mm Hg

138

221.04

insol

1.6

7.6

@ 160 ºC

88 oc

2,4-DICHLOROPHENOXY­PROPIONIC ACID
120-36-5

colourless crystalline solid; white to tan, crystalline solid

117.5-118.1

235.07

1.42

ETHANEDIOIC ACID, DIHYDRATE
6153-56-6

colourless crystals

sublimes

102

10g/100 ml

1.7

3.1

2-ETHYLHEXANOIC ACID
149-57-5

colourless liquid

228

- 59

144.2

sol

@ 25 ºC/4 ºC

5.0

0.004

0.8 ll
6.0 ul

118 oc

310

FLUOROACETIC ACID
144-49-0

needles; colourless crystals

165

35.2

78.04

sol

@ 36 ºC

@ 25 ºC

FORMIC ACID
64-18-6

colourless liquid

101

8.4

46.00

misc

1.22

1.6

4.4

14 ll
34 ul

69

480-520

FUMARIC ACID
110-17-8

needles, monoclinic prisms or leaflets from water; colourless crystals; white crystalline powder

@ 1.7 mm Hg

300-302

116.07

sl sol

1.635

GALLIC ACID
149-91-7

prisms from water; needles from absolute methanol or chloroform

253

170.1

sl sol

@ 6 ºC/4 ºC

GLYCOLIC ACID
79-14-1

colourless crystals; rhombic needles from water; leaves from ethanol

100

80

76.05

sol

HEPTANOIC ACID
111-14-8

clear oily liquid

223.01

-7.5

130.2

sl sol

0.92

ISOBUTYRIC ACID
79-31-2

colourless liquid

152-155

-47

88.1

v sol

0.950

3.0

@ 14.7 ºC

ISOPHTHALIC ACID
121-91-5

needles

sublimes

347

166.13

sl sol

LACTIC ACID
598-82-3

colourless liquid or colourless crystals

16.8-18

90.08

v sol

>74

LAURIC ACID
143-07-7

colourless solid; white, crystalline powder

298.9

44.2

200.3

insol

0.883

@ 121.0 ºC

MALEIC ACID
110-16-7

monoclinic prisms from water; white crystals from water, alcohol & benzene; colourless crystals

135

138-139

116.07

@ 25 ºC

1.590

4.0

MALEIC ANHYDRIDE
108-31-6

orthorhombic needles from chloroform; commercial grades in fused form, as briquettes; colourless needles or white lumps or pellets; needles from chloroform or ether

202.0

52.8

98.06

sol

1.48

3.4

@ 25 ºC

1.4 ll
7.1 ul

102

475

MALONIC ACID
141-82-2

white crystals

decomp

132- 134

104.06

sol

1.63

METHACRYLIC ACID
79-41-4

liquid or colourless crystals; colourless liquid

163

16

86.09

sol

1.0153

2.97

@ 25 ºC

77 oc

2-METHYL-4-CHLOROPHENOACETIC ACID
94-74-6

light brown solid; plates from benzene or toluene; white crystalline solid (pure compd); colourless crystalline solid (pure)

120

200.6

sl sol

@ 25 ºC/15.5 ºC

6.9

0.0002 Pa

METHACRYLIC ACID, 2-DIMETHYLAMINO­ETHYL
2867-47-2

liquid

62-65

-30

157.22

sol

@ 25 ºC/5 ºC

5.4

739 oc

NONANOIC ACID
112-05-0

colourless, oily liquid at ordinary temp; crystallizes when cooled; yellowish oil

255

12.5

158.23

insol

0.9057

OLEIC ACID
112-80-1

colourless or nearly colourless liquid (above 5-7 ºC); yellowish, oily liquid; water-white liquid

@ 100 mm Hg

16.3

282.45

insol

@ 25 ºC

363

OXALIC ACID
144-62-7

anhyd oxalic acid, crystallized from glacial acetic acid is orthorhombic, crystals being pyramidal or elongated octahedra; transparent, colourless crystals or white powder

157

189.5

90.04

sol

@ 17 ºC /4 ºC

PALMITIC ACID
57-10-3

white crystalline scales; needles from alcohol

@ 15 mm Hg

63-64

256.5

insol

@ 62 ºC/4 ºC

@ 154 ºC

PHTHALIC ACID
88-99-3

crystals; plates from water

decomp

210-211

166.13

sl sol

1.59

5.73

168 oc

PHTHALIC ANHYDRIDE
85-44-9

white, lustrous needles; colourless or pale yellow solid flakes; colourless needles; monoclinic or rhombic prisms; white needles from alcohol and benzene

295

130.8

148.11

sl sol

1.527

5.1

0.27 Pa

1.7 ll
10.4. ul

570

PIVALIC ACID
75-98-9

coloured crystals

164

35.5

102.13

sl sol

@ 50 ºC

PROPIONIC ANHYDRIDE
123-62-6

colourless liquid

167

-45

130.2

decomposes

1.01

4.5

100

1.3 ll
9.5 ul

63

285

PROPIONIC ACID
79-09-4

colourless liquid; oily liquid

141

-20.8

74.09

misc

0.9930

2.56

0.386

2.9 ll
14.8 ul

544

955

SALICYLIC ACID
69-72-7

white, fine, needle-like crystals, or fluffy, white crystalline powder; needles in water; monoclinic prisms in alcohol

211

158

138.12

sl sol

1.443

4.8

0.114

1.1 ll
? ul

157

540

STEARIC ACID
57-11-4

monoclinic leaf from alcohol; white or slightly yellow, crystal masses or powder

@ 15 mm Hg

69

284.50

insol

0.9408

9.80

@ 173.7 ºC

196

395

SUCCINIC ACID
110-15-6

white minute monoclinic prisms; triclinic or monoclinic prisms

235

188

118.09

sl sol

@ 25 ºC/4 ºC

SULPHANILIC ACID
121-57-3

rhombic plates or monoclinic crystals from water

288

173.2

sl sol

@ 25 ºC/4 ºC

TARTARIC ACID
87-69-4

169

150.08

TEREPHTHALIC ACID
100-21-0

needles; white crystals or powder

402

166.13

insol

1.51

< 0.001

260

496

p-tert BUTYLBENZOIC ACID
98-73-7

needles from dilute alcohol

164.5-165.5

178.2

insol

p-TOLUENESULPHONIC ACID
104-15-4

monoclinic leaflets or prisms; colourless crystals

140

106-107

172.2

v sol

1.24

184 cc

TRICHLOROACETIC ACID
76-03-9

crystals; colourless; white solid

197.55

58

163.40

v sol

@ 25 C/4 ºC

@ 51.0 ºC

2,4,5-TRICHLORO­PHENOXYACETIC ACID
93-76-5

white solid; light tan solid

decomp

153

255.5

insol

1.80

< 0.01 mPa

TRIFLUOROACETIC ACID
76-05-1

colourless, fuming liquid

73

-15.2

114.02

sol

@ 25 ºC

TRIMELLITIC ANHYDRIDE
552-30-7

crystals; colourless solid

240-245

161-163.5

192.13

reacts

6.6

@ 25 ºC

1 ll
7 ul

VALERIC ACID
109-52-4

colourless liquid

186-187

-34.5

102.15

sol

0.939

3.5

0.020

96 oc

400