1 Scope
This standard is applicable to food additive potassium hydroxide made from potassium chloride solution through ion membrane or membrane electrolysis.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
3 Molecular Formula and Relative Molecular Mass
3.1 Molecular formula
KOH
3.2 Relative molecular mass
56.11 (according to Atomic Weights of the Elements 2007)
4 Technical Requirements
4.1 Sensory requirements: shall be in accordance with those specified in Table 1.
Table 1 Sensory Requirements
Item Requirements Inspection method
Solid Liquid
Color and odor White or nearly white, inodorous Colorless and inodorous Take appropriate amount of solid specimen, put it into a 50mL plastic beaker, and observe its color and structural state in natural light, and smell its odor.
Take 50mL liquid sample and place it in a 50mL colorimetric tube, judge its appearance vertically with a black substrate in natural light a
Structural state Particle, flak, club-shaped or molten solid Clearly or slightly muddy liquid
a After completion of the test, immediately clean the colorimetric tube.
4.2 Physical and chemical indexes: shall be in accordance with those specified in Table 2.
Foreword i
1 Scope
2 Normative References
3 Molecular Formula and Relative Molecular Mass
4 Technical Requirements
Annex A (Normative) Inspection Method
Annex B (Informative) Disposal of Waste Liquid with Mercury
1 Scope
This standard is applicable to food additive potassium hydroxide made from potassium chloride solution through ion membrane or membrane electrolysis.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
3 Molecular Formula and Relative Molecular Mass
3.1 Molecular formula
KOH
3.2 Relative molecular mass
56.11 (according to Atomic Weights of the Elements 2007)
4 Technical Requirements
4.1 Sensory requirements: shall be in accordance with those specified in Table 1.
Table 1 Sensory Requirements
Item Requirements Inspection method
Solid Liquid
Color and odor White or nearly white, inodorous Colorless and inodorous Take appropriate amount of solid specimen, put it into a 50mL plastic beaker, and observe its color and structural state in natural light, and smell its odor.
Take 50mL liquid sample and place it in a 50mL colorimetric tube, judge its appearance vertically with a black substrate in natural light a
Structural state Particle, flak, club-shaped or molten solid Clearly or slightly muddy liquid
a After completion of the test, immediately clean the colorimetric tube.
4.2 Physical and chemical indexes: shall be in accordance with those specified in Table 2.
Contents of GB 25575-2010
Foreword i
1 Scope
2 Normative References
3 Molecular Formula and Relative Molecular Mass
4 Technical Requirements
Annex A (Normative) Inspection Method
Annex B (Informative) Disposal of Waste Liquid with Mercury
