Sodium hydroxide crystals (Sodasorb)are used to scrub CO₂ from a rebreathing circuit.What is the color these crystals change to when they are fully depleted?

Question

Sodium hydroxide crystals (Sodasorb)are used to scrub CO2 from a rebreathing circuit.What is the color these crystals change to when they are fully depleted?

Sodium hydroxide crystals (Sodasorb)are used to scrub CO₂ from a rebreathing circuit.What is the color these crystals change to when they are fully depleted?