Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Information
Name: Citric acid monohydrate
Alias: 2-Hydroxypropane-1,2,3-tricarboxylic acid monohydrate
CAS No.: 5949-29-1
Molecular Formula: C?H?O?·H?O
Molecular Weight: 210.14
2. Physical and Chemical Properties
Physical Properties
- Appearance: Colorless transparent crystal or white crystalline powder
- Odor: Odorless, strong refreshing sour taste
- Solubility: Freely soluble in water; soluble in ethanol; slightly soluble in ether
- Melting Point: Loses crystal water at 70–75 °C, melts at 135–152 °C (anhydrous)
- Crystal form: Orthorhombic granular crystal
- Hygroscopicity: Slightly hygroscopic under high humidity conditions
Chemical Properties
- Molecular Structure: Tricarboxylic acid with one hydroxyl group, contains one crystal water molecule; typical polybasic organic acid
- Acidic property: Three dissociable carboxyl groups, strong buffering capacity when mixed with citrate salts
- Chelating performance: Hydroxyl and carboxyl groups readily chelate metal ions such as Ca2?, Fe3?, Mg2?
- Thermal stability: Dehydrates to anhydrous citric acid at above 70 °C; decomposes above 175 °C to generate aconitic acid, carbon dioxide and acetone
- Photostability: Stable under natural light, no discoloration or degradation
- Compatibility: Compatible with most food raw materials, pigments, preservatives and cosmetic ingredients; incompatible with strong oxidants, alkaline substances in high temperature environment
3. Main Application Fields
1. Food & Beverage Additive (Core Application)
- Acidity regulator, flavor enhancer for carbonated drinks, fruit juice, candy, jam, dairy and frozen food
- Antioxidant synergist, color stabilizer to prevent fruit browning and extend shelf life
- pH buffering agent for food preservation systems
2. Pharmaceutical Excipient
- Acidifier and flavor masking agent for oral tablets, granules, syrups and effervescent formulations
- Chelating stabilizer for injection preparations; component of effervescent salt formulations
3. Cosmetic & Personal Care Raw Material
- Mild AHA exfoliating ingredient for toner, facial cream and mask
- pH adjuster, metal ion chelator to improve product stability
4. Industrial & Water Treatment Chemical
- Cleaning agent for metal surface descaling, boiler scale removal
- Water treatment chelating agent to reduce hard water influence
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 5949-29-1 |
| Molecular Formula | C?H?O?·H?O |
| Molecular Weight | 210.14 |
| Appearance | White crystalline powder / colorless crystal |
| Assay | 99.0% ~ 101.0% |
| Loss on Drying (crystal water) | 8.5% ~ 9.2% |
| Residue on Ignition | ≤0.07% |
| Heavy Metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤1 ppm |
| Packaging | 25kg food-grade PE lined woven bag / fiber drum |
| Storage Condition | Hermetic cool dry warehouse below 25 °C; isolate alkaline materials |
| Transportation Requirement | Non-dangerous goods, moisture-proof sealed packaging |
| Shelf Life | 36 months under intact sealed packaging |
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