Chemical Name

Diphenyl (2,4,6-trimethylbenzoyl)-phosphine oxide

Chemical Structure

Molecular weight

348.37

CAS NO.

75980-60-8

Physical Properties

Appearance

Pale yellow crystal or powder

Purity(%)

≥99.0

Melting Point(℃)

91-94

Absorption(nm)

240, 380

Applications

TPO is a photoinitiator for curing styrene-based unsaturated polyesters and acrylic resins. Its absorption in the long-wave region of the UV spectrum can fully cure even white paints and surfaces pigmented with TiO₂. Such coatings are characterized by particularly low yellowing. TPO can also be used to cure clear coatings and is particularly suitable when low-odor products are desired.

Storage Conditions

TPO is sensitive to visible light and any exposure to sunlight should be avoided. Kept at low/ambient temperature and dry conditions. Avoid contacting with strong oxidants.

The product is stable for 2 years if stored in original, sealed containers under above-mentioned conditions.

Packaging

20Kg drum/carton