Malic acid USP-NF/Ph.Eur 5KG Go Back


: 617-48-1

Molecular Formula

: C4H6O5

Molecular Weight

: 134.09
Appearance/Description: White or practically white or almost white, crystalline powder or granules. Melts at about 130°C.
Solubility: Very soluble in water; freely soluble in alcohol and Sparingly soluble in acetone.
Identification (By IR): IR spectra of the sample should be concomitant with IR spectra of the standard.
Identification (By Melting point): 128.0°C - 132.0°C
Appearance of solution: Clear and colourless.
Assay: 99.0% - 100.5% C4H6O5.
Assay (anhydrous substance): 99.0% to 101.0%
Optical Rotation: -0.10° to + 0.10°
Water insoluble substances: NMT 0.1%
Residue on ignition /Sulfated ash: NMT 0.1%
Related substances: Impurity A (Fumaric acid): NMT 1.0 %
Related substances: Impurity B (Maleic acid): NMT 0.05%
Related substances: Any other impurity: NMT 0.1%
Related substances: Total of other impurities: NMT 0.5%
Water: NMT 2.0%
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