1.0 M Cirtric acid pH 3.5

100 mL bottle of 1.0 M Cirtric acid pH 3.5 Optimize Reagent.
Synonyms: Citric acid anhydrous
C6H8O7
HOC(COOH)(CH2COOH)2
Mr 192.13
CAS Number [77-92-9]
EC Number 201-069-1
Beilstein Registry Number 782061
Merck 14, 2326
RTECS GE7350000
MDL Number MFCD00011669
PubChem Substance ID 24856611
Purity > 99.5%
Useful pH range of citric acid as a buffer 2.2 - 6.5
pKa1 = 3.13
pKa2 = 4.76
pKa3 = 6.4
HR2-757 is titrated to pH 3.5 at 25 degrees Celsius using NaOH
Measured Conductivity Range: 28.7 - 33.3 mS/cm at 25 degrees Celsius
Measured Refractive Index Range: 1.36236 - 1.36329 at 20 degrees Celsius
Al <0.0005%
As <0.00001%
Ba <0.0005%
Bi <0.0005%
Ca <0.001%
Cd <0.0005%
Cl <0.0005%
Co <0.0005%
Cr <0.0005%
Cu <0.0005%
Fe <0.0005%
K <0.005%
Li <0.0005%
Mg <0.0005%
Mn <0.0005%
Mo <0.0005%
Na <0.005%
Ni <0.0005%
Oxalate (C2O4) <0.05%
Pb <0.0005%
PO4 <0.0005%
SO4 <0.002%
Sr <0.0005%
Tartrate (C4H4O6) <0.2%
Zn <0.0005%