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citric acidThis product is colorless or white crystalline granules or powder (slightly gray-yellow in the second grade), odorless, very sour taste, easily soluble in water and ethanol, slightly soluble in ether.The aqueous solution is acidic, and citric acid monohydrate is slightly weathered in dry air.
citric acid | |||||
Indicator name | anhydrous citric acid | Citric acid monohydrate | |||
Gifted class | level one | Gifted class | level one | Secondary | |
Identification test | Meet the experiment | Meet the experiment | |||
Citric acid content/% | 99.5-100.5 | 99.5-100.5 | ≥99.0 | ||
Transmittance/% ≥ | 98.0 | 96.0 | 98.0 | 95.0 | —— |
Moisture/% | ≤0.5 | 7.5-9.0 | —— | ||
Easy carbonization ≤ | 1.0 | 1.0 | —— | ||
Sulfated ash/% ≤ | 0.05 | 0.05 | 0.1 | ||
Chloride/% ≤ | 0.005 | 0.005 | 0.01 | ||
Sulfate/% ≤ | 0.01 | 0.015 | 0.05 | ||
Oxalate/% ≤ | 0.01 | 0.01 | —— | ||
Calcium salt/% ≤ | 0.02 | 0.02 | —— | ||
Iron/(mg/kg) ≤ | 5.0 | 5.0 | —— | ||
Arsenic salt/(mg/kg) ≤ | 1.0 | 1.0 | —— | ||
Heavy metal (calculated as Pb)/(mg/kg) ≤ | 5.0 | 5.0 | —— | ||
Water insoluble matter | The filter membrane basically does not change color, and no more than 3 variegated particles can be seen visually | The filter membrane basically does not change color, and no more than 3 variegated particles can be seen visually | —— | ||
Product Usage:
Citric acid can be used as a buffer, complexing agent, metal cleaning agent, mordant, gelling agent, toner, etc.It is widely used in industrial fields such as electronics, textiles, petroleum, leather, construction, photography, plastics, casting and ceramics.
Instructions:
First dilute the product into 10%-20% aqueous solution (calculated according to the weight of the product). According to different water quality and different purposes, conduct a small test on site to find out the appropriate dosage and put it into use.
Packaging and storage:
1. The inner packaging material of the product should meet the hygienic requirements of food packaging materials.The inner packaging is tightly sealed and must not be ventilated, and the outer packaging shall not be polluted.
2. The product should be handled with care during transportation, and pollution, rain and exposure should be strictly prevented.
3. The means of transportation must be clean, non-toxic and pollution-free.It is strictly forbidden to mix and transport with toxic, harmful and corrosive substances.
4. The product should be stored in a cool, dry, ventilated and pollution-free environment, and should not be stacked in the open air.The suitable storage temperature is 30°C and the relative humidity is below 50%.
citric acidThis product is colorless or white crystalline granules or powder (slightly gray-yellow in the second grade), odorless, very sour taste, easily soluble in water and ethanol, slightly soluble in ether.The aqueous solution is acidic, and citric acid monohydrate is slightly weathered in dry air.
citric acid | |||||
Indicator name | anhydrous citric acid | Citric acid monohydrate | |||
Gifted class | level one | Gifted class | level one | Secondary | |
Identification test | Meet the experiment | Meet the experiment | |||
Citric acid content/% | 99.5-100.5 | 99.5-100.5 | ≥99.0 | ||
Transmittance/% ≥ | 98.0 | 96.0 | 98.0 | 95.0 | —— |
Moisture/% | ≤0.5 | 7.5-9.0 | —— | ||
Easy carbonization ≤ | 1.0 | 1.0 | —— | ||
Sulfated ash/% ≤ | 0.05 | 0.05 | 0.1 | ||
Chloride/% ≤ | 0.005 | 0.005 | 0.01 | ||
Sulfate/% ≤ | 0.01 | 0.015 | 0.05 | ||
Oxalate/% ≤ | 0.01 | 0.01 | —— | ||
Calcium salt/% ≤ | 0.02 | 0.02 | —— | ||
Iron/(mg/kg) ≤ | 5.0 | 5.0 | —— | ||
Arsenic salt/(mg/kg) ≤ | 1.0 | 1.0 | —— | ||
Heavy metal (calculated as Pb)/(mg/kg) ≤ | 5.0 | 5.0 | —— | ||
Water insoluble matter | The filter membrane basically does not change color, and no more than 3 variegated particles can be seen visually | The filter membrane basically does not change color, and no more than 3 variegated particles can be seen visually | —— | ||
Product Usage:
Citric acid can be used as a buffer, complexing agent, metal cleaning agent, mordant, gelling agent, toner, etc.It is widely used in industrial fields such as electronics, textiles, petroleum, leather, construction, photography, plastics, casting and ceramics.
Instructions:
First dilute the product into 10%-20% aqueous solution (calculated according to the weight of the product). According to different water quality and different purposes, conduct a small test on site to find out the appropriate dosage and put it into use.
Packaging and storage:
1. The inner packaging material of the product should meet the hygienic requirements of food packaging materials.The inner packaging is tightly sealed and must not be ventilated, and the outer packaging shall not be polluted.
2. The product should be handled with care during transportation, and pollution, rain and exposure should be strictly prevented.
3. The means of transportation must be clean, non-toxic and pollution-free.It is strictly forbidden to mix and transport with toxic, harmful and corrosive substances.
4. The product should be stored in a cool, dry, ventilated and pollution-free environment, and should not be stacked in the open air.The suitable storage temperature is 30°C and the relative humidity is below 50%.
