Specific migration testing – photoinitiators

Photoinitiators are substances that are added to printing inks to initiate the curing process upon exposure to UV light. These substances are also potential contaminants in recycled fibers.

The compliance of materials can be evaluated by the following regulations/recommendations:

• German BfR XXXVI Annex for recycled fibers

• French DGCCRF Fiche MCDA n°4 (V02 – 01-01-2019)

• Swiss Ordinance for consumer goods No. 817.023.21, Annex 10

This photoinitiator analysis package includes the following substances:

• Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide [CAS: 162881-26-7]

• 2-Benzyl-2-(dimethylamino)-4'-morpholinobutyrophenone [CAS: 119313-12-1]

• Irgacure 127 [CAS: 474510-57-1]

• Methyl 2-benzoylbenzoate [CAS: 606-28-0]

• Irgacure 2959 [CAS: 106797-53-9]

• 2,4-Diethyl-9H-thioxanthen-9-one (DETX) [CAS: 82799-44-8]

• 2-Carboxybenzophenone [CAS: 85-52-9]

• Esacure ONE [CAS: 163702-01-0]

• 2,2-Dimethoxy-2-phenylacetophenone [CAS: 24650-42-8]

• 2-Methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one [CAS: 71868-10-5]

• Padimate A [CAS: 21245-01-2]

• Ethyl 4-(dimethylamino)benzoate [CAS: 10287-53-3]

• 2-Ethylhexyl 4-(dimethylamino)benzoate [CAS: 21245-02-3]

• 4-Phenylbenzophenone [CAS: 2128-93-0]

• Benzophenone [CAS: 119-61-9]

• Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide [CAS: 75980-60-8]

• Esacure 1001 M [CAS: 272460-97-6]

• Esacure A 198 [CAS: 925246-00-0]

• 1-Chloro-4-propoxy-9H-thioxanthen-9-one (CPTX) [CAS: 142770-42-1]

• 2-Hydroxy-2-methylpropiophenone [CAS: 7473-98-5]

• 4,4'-Bis(diethylamino)benzophenone (DEAB) [CAS: 90-93-7]

• 4,4'-Bis(dimethylamino)benzophenone (Michler’s ketone) [CAS: 90-94-8]

• 4-Hydroxybenzophenone [CAS: 1137-42-4]

• 4-Hydroxymethylbenzophenone

• 4-Methoxybenzophenone [CAS: 611-94-9]

• 2,4,6-Trimethylbenzophenone [CAS: 954-16-5]

• Sum of methylbenzophenone isomers