Medicinal grade phosphoric acid cas7664-38-2 uses

Medicinal grade phosphate cas7664-38-2 use appearance and properties: colorless transparent or slightly light color thick liquid, pure phosphoric acid is colorless crystal, odorless, with sour taste
.

Melting Point(°C): 42.
35(pure)Boiling point(°C): 261 Relative density 1.
70 Relative density (water=1): 1.
87(pure)Relative vapor density (air=1): 3.
38 Saturated vapor pressure (kPa): 0.
67(25°C, pure) Solubility: Miscible with water, miscible in ethanol.
Phosphoric acid, also known as orthophosphate acid, is a common inorganic acid, is a medium to strong acid, the chemical formula is H3PO4, the molecular weight is 97.
994
.

Not easily volatile, not easy to decompose, almost no oxidation
.

It has the generality of acid, which is a ternary weak acid, which is weaker than hydrochloric acid, sulfuric acid and nitric acid, but stronger
than acetic acid and boric acid.

Phosphoric acid is easily deliquefied
in the air.

Heating will lose water to obtain pyrophosphate acid, and then further water loss to obtain metaphosphoric acid
.

Phosphoric acid is mainly used in pharmaceutical, food, fertilizer and other industries, including as a rust inhibitor, food additives, dental and orthopedics, EDIC corrosive agents, electrolytes, fluxes, dispersants, industrial corrosives, fertilizers raw materials and components of household cleaning products, can also be used as chemical reagents
.

【Check】The clarity and color of the solution Take 1.
0g of this product, add 15ml of water and shake well, check according to law (General 0901 and General 0902), the solution should be clear and colorless
.

Ammonia precipitate Take 1.
0g of this product, add 15ml of water and 12ml of ammonia test solution, the solution should be produced
without turbidity.

And phosphorous acid take 1.
0g of this product, add 15ml of water and 6ml of silver nitrate test solution, water bath heating for 5 minutes, the solution should be no turbidity generated
.

Basic phosphate Take 1ml of this product, add 6ml of ethylene and 2ml of ethanol, the solution should be produced
without turbidity.

Nitrate Take 2.
6g of this product, add 3.
5ml of water, add 0.
1ml of indigo rouge test solution and 5ml of sulfuric acid in turn, and the blue color of the solution does not disappear
within 1 minute.

Chloride Take 2.
0g of this product, check according to law (General 0801), and compare with the control solution made of standard sodium chloride solution of 10.
0ml, it shall not be more concentrated (0.
005%)
.

Sulfate Take 2.
0g of this product, check according to law (General 0802), and compare with the control solution made of 2.
0ml of standard potassium sulfate solution, it shall not be more concentrated (0.
01%)
.

Iron salt Take 2.
0g of this product, add 30ml of water, shake well, take 3.
0ml, check according to law (General Rule 0807), compared with the control liquid made of standard iron solution 1.
0ml, it shall not be deeper (0.
005%)
.

Heavy metals Take 1.
0g of this product, add 1.
6ml of ammonia test solution, dilute to 25ml with water, check according to law (General 0821 First Law), containing heavy metals shall not exceed 10
parts per million.

Arsenic salt take 1.
0g of this product, add 5ml of hydrochloric acid and 22ml of water, check according to law (General 0822 First Law), should comply with the provisions (0.
0002%)
.