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Table 3 Individual solvent failures and occurrence in samples

From: An assessment of solvent residue contaminants related to cannabis-based products in the South African market

   

USP limit (ppma)

Passed

Failed

Present

Not detected

Class 3

2-butanol

 

< 5000

279

0

0

279

Acetone

 

< 5000

272

7

106

173

Butanone

 

< 5000

278

1

9

270

Diethyl ether

 

< 5000

279

0

0

279

Ethanol

 

< 5000

205

74

128

151

Ethyl acetate

 

< 5000

278

1

49

230

IsoOH (isopropanol)

 

< 5000

236

43

131

148

MTBE (tertbutyl methyl ether)

< 5000

279

0

9

270

Class 2

1.4 dioxane

 

< 380

15

0

0

15

Acetonitrile

 

< 410

15

0

0

15

Chlorobenzene

 

< 360

15

0

0

15

Cyclohexane

 

< 3880

15

0

0

15

Cumene (isopropyl benzene)

< 70

15

0

1

14

Methanol

 

< 3000

14

1

6

9

Methyl cyclohexane

 

< 1180

15

0

0

15

Methylene chloride

 

< 600

15

0

0

15

Ethylbenze

Total xylenes

< 2170

14

1

1

14

o-xylene

15

0

1

14

p+m xylene

15

0

1

14

Tetrahydrofuran

 

< 720

15

0

0

15

Toluene

 

< 890

15

0

0

15

Trans 1,2 dichloroethene

Total dichloroethenes

< 1870

15

0

0

15

Cis dichloro-ethene

15

0

1

14

Class 1

Benzene

 

< 2

5

0

2

3

   

Total

2334

128

445

2017

  1. appm parts per million