Citric acid AR Grade is a white crystalline powder, It can exist as either non-hydrate or monohydrate. CAS 5949-29-1 EC 221-095-7| Chemical Reagents net

It is a crucial compound in various industries, particularly in food and pharmaceutical sectors, due to its acidity and versatile applications as an acidulant, flavoring agent, and preservative.

General Information

Name: Citric Acid Monohydrate
CAS Number: 5949-29-1
Molecular Weight: 210.14
Molecular Formula: C6H8O7·H2O
MDL Number: MFCD00149972
EC Number: 221-095-7
Citric Acid Monohydrate is a crystalline organic acid widely used in food and beverage industries as an acidulant and flavor enhancer.

Brand and Packaging

Brand: KeShi Packaging: 500mg × 20 bottles/case

Physical Properties

Appearance: Colorless to white crystals or powder
Density: 1.665 g/cm³
Melting Point: 135-152°C (decomposes)
Solubility: Soluble in water; sparingly soluble in ethanol

Chemical Properties

Acidity (pKa): pKa1 = 3.13, pKa2 = 4.76, pKa3 = 6.40
Reactivity: Acts as a weak organic acid; undergoes esterification and oxidation reactions.

Structural Formula

Quality inspection report

       HOOC-C(CH2COOH)(CH(OH)COOH)-CH2COOH · H2O

Quality inspection report

| Product Name    | Specification | Lot Number  | Molecular Formula | Molecular Weight | Lot Size | Inspection Unit | Sample Category | Report Date | Inspection Basis |
|-----------------|---------------|-------------|-------------------|------------------|----------|-----------------|-----------------|-------------|------------------|
| Citric Acid, Monohydrate | Analytical Grade | 2023040101 | C6H8O7·H2O        | 210.14           | 5000kg   | Production Unit | Organic         | 2023.04.03  | GB/T9855-2008    |

| Test Item                | Standard Requirement | Test Result |
|--------------------------|----------------------|-------------|
| Content,%                | ≥99.5                | 99.8        |
| Appearance               | Colorless crystals or white granules | White granules |
| Clarity Test/Number      | ≤4                   | <4          |
| Water Insoluble Substances,% | ≤0.005          | 0.003       |
| Residue on Ignition (as SO4),% | ≤0.02          | 0.01        |
| Chloride (Cl),%          | ≤0.0005              | <0.0005     |
| Sulfate (SO4),%          | ≤0.005               | <0.005      |
| Phosphate (PO4),%        | ≤0.001               | <0.001      |
| Oxalate (C2O4),%         | ≤0.05                | <0.05       |
| Carbonizable Substances  | Pass                 | Pass        |
| Calcium (Ca),%           | ≤0.005               | 0.0004      |
| Iron (Fe),%              | ≤0.0005              | <0.0005     |
| Copper (Cu),%            | ≤0.0005              | 0.00003     |
| Lead (Pb),%              | ≤0.0005              | 0.00006     |

Analysis Conclusion:
Meets the requirements of GB/T9855-2008 for analytical grade.

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