Citric Acid Monohydrate
Description
Citric Acid Monohydrate serves as an acidified, food additive, pharmaceutical ingredient, and preservative.
NSF Certified Product-NSF/ANSI 60
Applications and Effects
Its main application revolves around enhancing the taste of juices and prolonging the freshness of confectionery items, extending their shelf life to 90 days.
Specifications
Colorless, translucent crystals, or white, granular to fine, crystalline powder. Efflorescent in dry air.
Very soluble in water; Freely soluble in alcohol; very slightly soluble in ether.
By Infrared absorption. Dry the substance to be examined at 105°C for 2 hours.
The test solution shows the same clarity as that of water.
The test solution is not more intensely colored than standard solution A, B or C, or water.
Between 7.5 and 9.0%
Residue on ignition
The color of the acid is not darker than that of a similar volume of Matching Fluid K in a matching tube, the tubes being observed vertically against a white background.
Not more than 0.015%
Not more than 0.001%
Not more than 0.036%
99.5% to 100.5%. (On Anhydrous basis)
White or almost white, crystalline powder; colourless crystals or granules, efflorescent.
Very soluble in water; Freely soluble in ethanol (96 per cent).
First identification B, E.
Second Identification A, C, D, E.
(A) The solution is strongly acidic.
(B) By IR. Dry the substance to be examined and the reference substance at 100° – 105° C for 2 h.
(C) A red colour develops.
(D) A white precipitate is formed.
(E) Water.
The Solution is clear and not more intensely coloured than reference solution Y7, BY7 or GY7. (Method II)
The solution is not more intensely coloured than a mixture of 1 ml of red primary solution and 9 ml of yellow primary solution.
Not more than 360 ppm
Not more than 150 ppm
Not more than 10 ppm
Not more than 10 ppm
Not more than 0.1%, determined on 1.0 g
Not more than 0.1%, determined on 1.0 g
Colourless crystals or a white, crystalline powder; slightly efflorescent in warm, dry air.
Very soluble in water; Freely soluble in ethanol (95%); sparingly soluble in ether.
(A) :
Determine by infrared absorption spectrophotometry.
Compare the spectrum with that obtained with citric acid monohydrate RS or with the reference spectrum of citric acid monohydrate. Dry the substance under examination and the reference substance at 105° C for 2 hours.
(B) :
Gives reaction A of citrates,
(A) A white precipitate soluble in 6M acetic acid.
(C) :
10 percent w/v solution is strongly acidic.
The solution is clear and not more intensely coloured than reference solution YS7, BYS7 or GYS7.
Not more than 1 ppm
Any opalescence produced is not more intense than that of a mixture of 5 ml of solution A and 5 ml of distilled water.
Not more than 10 ppm
Not more than 10 ppm
Not more than 50 ppm
Not more than 50 ppm
Not more than 150 ppm
Any pink colour produced is not more intense than that produced by carrying out the test using 0.2ml of oxalic acid dissolved in 4 ml of water.
Any colour produced is not more intense than that of the mixture of 1.0 ml of CCS and 9.0 ml of FCS.
Not more than 0.1%
7.5 to 9.0%, determined on 0.5 g.
99.0% to 101.0% (On Anhydrous Basis)
Colourless crystals or a white, crystalline powder; slightly efflorescent in warm, dry air.
Very soluble in water; Freely soluble in ethanol (95%); sparingly soluble in ether.
(A) :
Determine by infrared absorption spectrophotometry.
Compare the spectrum with that obtained with citric acid monohydrate RS or with the reference spectrum of citric acid monohydrate. Dry the substance under examination and the reference substance at 105° C for 2 hours.
(B) :
Gives reaction A of citrates,
(A) A white precipitate soluble in 6M acetic acid.
(C) :
10 percent w/v solution is strongly acidic.
The solution is clear and not more intensely coloured than reference solution YS7, BYS7 or GYS7.
Not more than 1 ppm
Any opalescence produced is not more intense than that of a mixture of 5 ml of solution A and 5 ml of distilled water.
Not more than 200 ppm
Not more than 10 ppm
Not more than 50 ppm
Not more than 50 ppm
Not more than 150 ppm
Any colour produced is not more intense than that of the mixture of 1.0 ml of CCS and 9.0 ml of FCS.
Any colour produced is not more intense than that of the mixture of 1.0 ml of CCS and 9.0 ml of FCS.
Not more than 0.1%
7.5% to 9.0%, determined on 0.5 g.
99.0% to 101.0% (On Anhydrous Basis)