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Citric acid monohydrate, for analysis, ExpertQ®, ACS, ISO, Reag. Ph Eur

- Synonyms: 2-Hydroxy-1,2,3-propanetricarboxylic acid monohydrate, b-Hydroxytricarballylic acid monohydrate
- C6H8O7·H2O
- M = 210,14 g/mol
- CAS [5949-29-1]
- EINECS-No.: 201-069-1
- Solub. in water: (20 ºC): very soluble in water
- Melting point: 135 - 152 ºC
- Boiling point: 135 - 152 ºC (decomposes)
- Ignition temp.: 345 ºC
- Vapour pressure: (20 ºC) < 0,1 hPa
- LD 50 (oral, rat): 3000 mg/kg
- GHS-signal word: Warning
- GHS-H sentences: H319
- GHS-P sentences: P280 - P264 - P305+P351+P338 - P337+P313
- Tariff number: 2918 14 00 00
- Applications: analytical chemistry, laboratory reagent, in buffer solutions.

SPECIFICATIONS
assay (acidimetric): 99,5 - 100,5 %

dried sample): 99,5 - 100,5 %
identity (IR-spectrum): passes test
appearance of solution : passes test
insoluble in water: max. 0,005 %
chlorides (Cl): max. 5 ppm
phosphates (as PO4): max. 0,001 %
oxalates (C2O4): passes test
sulfates (SO4): max. 0,002 %
oxalic acid (C2H2O4): max. 360 ppm
sulphur compounds (as SO4): max. 0,002 %
calcium (Ca): max. 10 ppm
copper (Cu): max. 5 ppm
iron (Fe): max. 3 ppm
lead (Pb): max. 2 ppm
magnesium (Mg): max. 10 ppm
nickel (Ni): max. 1 ppm
readily carbonizable substances: passes test
residue on ignition: max. 0,02 %
water (K.F.): 7,5 - 9,0
suitability for determination of Fe: passes test