Phthalocyanine Is a Large Molecule Used in Printing Inks and Dyes

question 39

Multiple Choice

Phthalocyanine is a large molecule used in printing inks and dyes for clothing due to its insolubility in most solvents, its chemical stability, and its intense blue color. Elemental analysis showed that it consists of 74.69% C, 3.525% H, and 21.77% N, and has a molar mass of 514.54 g/mol. What is the molecular formula for phthalocyanine?

• A)C₁₆H₉N₄
• B)C₃₀H₈N₁₀
• C)C₃₂H₁₈N₈
• D)C₃₂H₄N₉
• E)C₁₆H₁₈N₄

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