Citric acid, anhydrous 99.5-100.05% (alkalimetric, calculated on anhydrous substance), powder, EMPROVE® ESSENTIAL Ph. Eur., BP, JP, USP, E330, FCC, SAFC®Supplier: MERCK PRODUCTION CHEMICALS
Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental Impurities). Class 1 to 3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated.
Conforms to the purity criteria on food additives according to the current European Commission Regulation.
MW: 192,13 g/mol
Boiling Pt: 200 °C (1013 hPa) Dec.
Melting Pt: 153 °C Dec.
Density: 1,665 g/cm³ (18 °C)
Storage Temperature: Ambient
CAS Number: 77-92-9
Merck Index: 13,02350
Specification Test Results
|Assay (Alkalimetric, Calculated on Anhydrous Substance)||99.5 - 100.5%|
|Identity (IR-Spectrum)||Passes Test|
|Appearance||White to Amost White, Fine Powder|
|Appearance of Solution (200 g/l; Water)||Clear (≤3 NTU) and not more Intense in Color than Reference Solution Y₇, BY₇ or GY₇|
|Sulfate (SO₄)||≤50 ppm|
|Heavy Metals (as Pb||≤5 ppm|
|Al (Aluminium)||≤0.2 ppm|
|As (Arsenic)||≤1 ppm|
|Hg (Mercury)||≤1 ppm|
|Pb (Lead)||≤0.5 ppm|
|Oxalates (as C₂H₂O₄)||≤100 ppm|
|Residual Solvents (ICH (Q3C)||Excluded by Manufacturing Process|
|Readily Carbonisable Substance||Passes Test|
|Sulfated Ash (600 °C)||≤0.05%|
|Water (According to Karl Fischer)||≤0.5%|
|Corresponds to Ph. Eur., BP, JP, USP, E 330, FCC|