In this paper we describe [phthalocyaninato]zinc octakis (methylene isothiuronium) chloride and [phthalocyannato]zinc octamethanethiol having as the starting substance octakis(cloromethyl) phthalocyanine zinc obtained by chloromethylation reaction of zinc phthalocyanine. The structures of the synthesized compounds were characterized by elemental analysis, FTIR and ¹H-NMR spectroscopies. The UV–Vis spectra of mentioned compounds depend on its concentration and generally present, a wavelength region with – the B band situated at approx. 300–400 nm and the Q band at approx. 600–800 nm. The UV–Vis spectra of [phthalocyaninato]zinc oktakis (methylene isothiuronium) chloride presented a broader Q-band in water solution with a shoulder on the red side. It is noticeable, the disappearance of Q peak splitting, with a slight hypsochromic shift at 639 nm, characteristic of the α-form of aggregation. Laser flash photolysis has been used to characterize the triplet state of [phthalocyaninato]zinc oktakis (methylene isothiuronium) chloride compound in dilute DMSO: H₂O, NVP: H₂O and H₂O solutions. The fluorescence decay curves for [phthalocyaninato]zinc oktakis (methylene isothiuronium) chloride at the interval of excitation wavelengths (λ_exc = 341…703 nm) show a biexponential behavior with lifetime values being yielded 2.31 μs and 1.23 μs in DMSO: H₂O, 1.22 μs and 9.22 μs in NVP: 9H₂O solvents. The decay curve of phosphorescence of [phthalocyaninato]zinc oktakis (methylene isothiuronium) chloride in H₂O are multi-exponential and are represented by the relatively long triplet lifetimes of 1.09 µs, 4.96 μs and 15.23 μs. The triplet lifetime and triplet quantum yield values of [phthalocyannato]zinc octamethanethiol in DMSO: H₂O are lower than of [phthalocyaninato]zinc octakis (methylene isothiuronium) chloride compound.