Silicon Phthalocyanine 4

**Semantic type:** Pharmacologic Substance

**Definition:** A synthetic photosensitizer agent containing a large macrocyclic ring chelated with silicon. Silicon phthalocyanine 4 localizes primarily in mitochondrial cytosolic membranes and, after photoexcitation, forms reactive oxygen species that induce apoptosis.

**Synonyms:** - PHOTOSENSITIZER PC-4 - Pc-4 (Silicone phthalocyanine) - Pc4 - silicon phthalocyanine 4