Chemical name: citric acid
English name: Citric acid
Molecular formula: C6H8O7
Molecular weight: 192.122
CAS NO: 77-92-9
Performance:
The relative density of 1.542, the melting point of 153 ° C (water loss), refractive index of 1.493 to 1.509
Colorless translucent crystal or white particles, or white crystalline powder, often containing one molecule of crystal water, odorless, very sour taste, soluble in water, alcohol and ether. Its calcium salt in hot water than in hot water is easy to dissolve, this property is often used to identify and isolate citric acid. Anhydrous citric acid can be obtained by controlling the temperature at the time of crystallization. The aqueous solution is acidic. In the dry air slightly weathered, in the humid air deliquescence. 175 ℃ above the decomposition of water and carbon dioxide release.
Uses:
1. For experimental reagents, chromatography reagents and biochemical reagents, but also for the preparation of buffer.
2. For the food industry in particular as acidifier, PH buffer, and other compounds together as a preservative.
3. In the detergent industry, it is an ideal substitute for phosphate.
4. Boiler chemical cleaning Pickling agent, boiler chemical cleaning rinse. Mainly used for food sour agent, but also for the preparation of pharmaceutical cooling agents, detergents used
Packing:
Lined with polyethylene plastic bags, plastic woven bags, 25Kg per bag.
Storage and Transportation:
Should be stored in a dry, ventilated and clean warehouse.
Quality Index
index
|
Specifies the criteria
|
Citric acid content（%）
|
≥99
|
Water content（%）
|
≤0.5
|
Sulfuric acid ash（%）
|
≤0.05
|
Oxalate（%）
|
≤0.01
|
chloride（%）
|
≤0.005
|
iron(ppm)
|
5.0
|
arsenic(ppm)
|
1.0
|
lead(ppm)
|
0.5
|
|
