- ▸ Visible-light cure of deeply pigmented and thick-section UV/visible coatings
- ▸ Color-filter resists and photoimaging in display and electronics manufacturing
- ▸ Holographic recording and photopolymer imaging media
- ▸ Radical initiator for acrylate systems that screen out near-UV light
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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This titanocene is a visible-light photoinitiator — one of the few initiators that responds to visible (blue/green) light. It is used where curing must happen under visible exposure or through colored films, notably color filters and visible-light imaging. Identity: PubChem / CAS 125051-32-3.
What it is
The titanocene (CAS 125051-32-3, a bis-cyclopentadienyl difluoro-pyrrolylphenyl titanium complex) is an orange/red solid. It is the classic visible-light photoinitiator for systems that cannot rely on UV alone.
How it cures
On absorbing visible light the titanocene complex generates reactive Ti-centred radicals that initiate polymerization, extending cure into the visible region where organic initiators do not absorb. It is often used together with a sensitizer/co-initiator package and is light-sensitive in handling.
Applications
Used in color-filter resists, visible-light-cure coatings and imaging, and pigmented systems needing visible-light response, typically alongside UV initiators and sensitizers. Related high-sensitivity imaging initiators: the carbazole oxime ester.
Forms, grades and handling
It is supplied as an orange/red solid and is notably light-sensitive. Photoinitiators are light-sensitive — store cool, dry and dark, away from light and ignition sources. Handle per the current Safety Data Sheet (SDS); each lot ships with a Certificate of Analysis (CoA) and Technical Data Sheet (TDS).
Bulk supply and RFQ
RawSource sources Titanocene Photoinitiator direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us your lamp (mercury or LED wavelength), system (clear or pigmented) and cure target, and we will quote the right grade. Compare the full range and selection logic in the photoinitiators guide.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / type | Photoinitiator (visible-light, titanocene) |
| Photoinitiator type | Visible-light photoinitiator (titanocene) |
| Absorption | Visible light (blue-green region) |
| CAS Number | 125051-32-3 |
| Molecular Formula | C30H22F4N2Ti |
| Molecular Weight | 534.4 g/mol |
| Handling | Light-sensitive; refer to the current SDS |
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 412-000-1
TSCA Inventory flag PMN: a commenced PMN (premanufacture notice) substance (EPA flag legend).
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is the titanocene photoinitiator used for?
The titanocene (CAS 125051-32-3, 784 type) is a visible-light photoinitiator used in color-filter resists and visible-light-cure imaging and coatings, where curing must occur under visible (blue/green) light or through colored films.
Why use a visible-light photoinitiator?
Most photoinitiators absorb only UV; a titanocene responds to visible light, enabling cure under visible exposure or in systems where UV cannot reach, such as certain color filters and imaging applications.
How is bulk the titanocene photoinitiator supplied and quoted?
RawSource supplies the titanocene photoinitiator in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade and volume; submit an RFQ with your target quantity.
What is the REACH and TSCA regulatory status of Titanocene Photoinitiator (bis(eta5-cyclopentadienyl)bistitanium)?
Titanocene Photoinitiator (bis(eta5-cyclopentadienyl)bistitanium) (CAS 125051-32-3) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 412-000-1).