Photography. Processing chemicals. Specifications for potassium ferricyanide Ingestion-build-65808 7 Context establishment

7  Context establishment

The specification covers apparatus designed for operation from an electricity supply the voltage of which does not exceed 250 volts

BS 4258-8 helps you to manufacture high-quality phosphoric acid

It applies to materials ready for normal use in the form of powder

however no emission requirements apply unless formulated in this standard

Photography. Processing chemicals. Specifications for potassium ferricyanide Ingestion-build-65808 7 Context establishment1 Scope This International Standard establishes criteria for the purity of photographic grade potassium ferricyanide and describes the tests to be used to determine the purity.