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Table 4 Number of sample failures and the occurrence of solvents 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

170

109

194

85

Acetone

 

< 5000

Butanone

 

< 5000

Diethyl ether

 

< 5000

Ethanol

 

< 5000

Ethyl acetate

 

< 5000

IsoOH (Isopropanol)

 

< 5000

MTBE (tertbutyl methyl ether)

< 5000

Class 2

1.4 Dioxane

 

< 380

13

2

13

2

Acetonitrile

 

< 410

Chlorobenzene

 

< 360

Cyclohexane

 

< 3880

Cumene (isopropyl benzene)

< 70

Methanol

 

< 3000

Methyl cyclohexane

 

< 1180

Methylene Chloride

 

< 600

Ethylbenze

Total xylenes

< 2170

o-xylene

p+m xylene

Tetrahydrofuran

 

< 720

Toluene

 

< 890

Trans 1,2 Dichloroethene

Total dichloroethenes

< 1870

Cis dichloro-ethene

Class 1

Benzene

 

< 2

5

0

2

3

   

Total

188

111

209

90

  1. appm parts per million