In Eucalyptus syrup NF VI one uses as a dye solutio viridis. Both patent blue and tartrazine are not available at this moment. What can you recommend as an alternative?

Use green power supply 7069 or Viride 7069, a combination of tartrazine and patent blue (CNK 2092013). Usual dosage: In NF6 stands 0.6 g/300ml syrup. So you can use up to 1 à 2g on a bottle of 300cc depending on how strong you want to have the color of your syrup.