C1909
Citric acid monohydrate
ACS reagent, ≥99.0%
Synonym(s):
2-hydroxy-1,2,3-propanetricarboxylic acid monohydrate
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About This Item
grade
ACS reagent
Quality Level
Assay
≥99.0%
form
powder
impurities
Substances carbonizable by hot sulfuric acid, passes test
≤0.005% Insoluble matter
ign. residue
≤0.02%
pKa
(1) 3.13, (2) 4.76, (3) 6.4
solubility
H2O: soluble 54 % (w/w) at 10 °C (Citric acid in water)
H2O: 59.2 % (w/w) at 20 °C (Citric acid in water)
H2O: 84.0 % (w/w) at 100 °C (Citric acid in water)
anion traces
chloride (Cl-): ≤0.001%
oxalate (C2O42-): passes test (limit about 0.05%)
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.002%
cation traces
Fe: ≤3 ppm
Pb: ≤2 ppm
functional group
carboxylic acid
SMILES string
OC(CC(O)(C(O)=O)CC(O)=O)=O.O
InChI
1S/C6H8O7.H2O/c7-3(8)1-6(13,5(11)12)2-4(9)10;/h13H,1-2H2,(H,7,8)(H,9,10)(H,11,12);1H2
InChI key
YASYEJJMZJALEJ-UHFFFAOYSA-N
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Related Categories
1 of 4
This Item | 33114 | C7129 | 27102 |
|---|---|---|---|
| grade ACS reagent | grade ACS reagent, puriss. p.a. | grade reagent grade | grade - |
| assay ≥99.0% | assay 99.5-100.5% (calc. on anhydrous substance), 99.5-102% | assay ≥98% (GC/titration) | assay 99.5-100.5% (based on anhydrous substance) |
| Quality Level 200 | Quality Level 200 | Quality Level 300 | Quality Level 200 |
| form powder | form solid | form powder | form grit |
| solubility H2O: soluble 54 % (w/w) at 10 °C (Citric acid in water), H2O: 84.0 % (w/w) at 100 °C (Citric acid in water), H2O: 59.2 % (w/w) at 20 °C (Citric acid in water) | solubility - | solubility H2O: 100 mg/mL, clear, colorless (Turbidity) | solubility - |
| anion traces chloride (Cl-): ≤0.001%, phosphate (PO43-): ≤0.001%, oxalate (C2O42-): passes test (limit about 0.05%), sulfate (SO42-): ≤0.002% | anion traces chloride (Cl-): ≤5 mg/kg, oxalate (C2O42-): ≤50 ppm, phosphate (PO43-): ≤10 mg/kg, sulfate (SO42-): ≤20 ppm | anion traces - | anion traces chloride (Cl-): ≤50 mg/kg, oxalate (as oxalic acid): ≤100 mg/kg, sulfate (SO42-): ≤100 mg/kg |
General description
Citric acid monohydrate is an organic weak acid used as a natural preservative in food and beverage products.[4]
Application
It may be used:
- As release-modifying agent to improve the release of diltiazem hydrochloride from melt extruded Eudragit RS PO tablets.[6]
- To prepare citrate buffer for use in the preparation of platelets for intravital microscopy.[7]
- To prepare Tris-citrate buffer employed for the electrophoresis of bacterial enzymes.[8]
Signal Word
Warning
Hazard Statements
Precautionary Statements
Hazard Classifications
Eye Irrit. 2 - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
11 - Combustible Solids
WGK
WGK 1
Flash Point(F)
345.0 °F - closed cup
Flash Point(C)
173.9 °C - closed cup
Personal Protective Equipment
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