From the Zone Imaging Web site:

• Ideal for both B&W film developed in either pyro/catechol staining or conventional developers

• Low odour, doesn’t require acidic stop bath, fast washing out times, long shelf life and designed for soft and hard water up to 500ppm

• Sodium thiosulphate based, free from: borate derivatives, non-biodegradable EDTA/DPTA based chelating agents, phosphates, acetic acid, known carcinogens and mutagens

Eco Zonefix Technical Data Sheet

Treat all chemicals as potentially toxic and use care when handling any darkroom chemistry.

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