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Ever wondered what’s really triggering the cure in your LED UV lash adhesive?
In this episode of Lash Science, we’re unpacking the most commonly used photo-initiators in the industry: TPO, TPO-L, TMO, BAPO, and CQ.
We explain what they are, how they work, and our opinions on each—especially when it comes to eye safety, sensitivity, and yellowing.
Whether you're a chemistry nerd or just want to know what’s in your glue, this one's for you.
List of Photo Initiators mentioned and their info:
TPO: Ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate
CAS #: 84434-11-7
TPO-L: Ethyl (2,4,6-trimethylbenzoyl)oxyphenylphosphinate
CAS #: 75980-60-8
TMO: Methylene bis(1,4-cyclohexanediyl)(bis(2-(4-methylphenyl)-2-propyl)phosphine oxide)
CAS #: 145052-34-2 (Note: TMO is less commonly listed by this name and may be referred to as a specialty phosphine oxide initiator. It’s sometimes proprietary.)
BAPO: Bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide
CAS #: 162881-26-7
CQ (Camphorquinone): 1,7,7-Trimethylbicyclo[2.2.1]heptan-2,3-dione
CAS #: 10373-78-1
SSPI: Diphenyl(4-sodium phenylthio)phenyl sulfonium hexafluorophosphate
CAS #: 72135-85-6
By carly weiss5
55 ratings
Ever wondered what’s really triggering the cure in your LED UV lash adhesive?
In this episode of Lash Science, we’re unpacking the most commonly used photo-initiators in the industry: TPO, TPO-L, TMO, BAPO, and CQ.
We explain what they are, how they work, and our opinions on each—especially when it comes to eye safety, sensitivity, and yellowing.
Whether you're a chemistry nerd or just want to know what’s in your glue, this one's for you.
List of Photo Initiators mentioned and their info:
TPO: Ethyl (2,4,6-trimethylbenzoyl)phenylphosphinate
CAS #: 84434-11-7
TPO-L: Ethyl (2,4,6-trimethylbenzoyl)oxyphenylphosphinate
CAS #: 75980-60-8
TMO: Methylene bis(1,4-cyclohexanediyl)(bis(2-(4-methylphenyl)-2-propyl)phosphine oxide)
CAS #: 145052-34-2 (Note: TMO is less commonly listed by this name and may be referred to as a specialty phosphine oxide initiator. It’s sometimes proprietary.)
BAPO: Bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide
CAS #: 162881-26-7
CQ (Camphorquinone): 1,7,7-Trimethylbicyclo[2.2.1]heptan-2,3-dione
CAS #: 10373-78-1
SSPI: Diphenyl(4-sodium phenylthio)phenyl sulfonium hexafluorophosphate
CAS #: 72135-85-6

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