Product Description of Citric Acid Monohydrate CAS#5949-29-1
Citric Acid Monohydrate has molecular formula C₆H₈O₇·H₂O and molecular weight of 210.14. It appears as colourless translucent crystals or white crystalline granular powder, odourless with pure sour taste.
This organic acid is highly soluble in water and moderately soluble in ethanol. It contains crystal water, and will lose water when heated above 74 °C. Available in food, pharmaceutical and industrial grades complying with USP, FCC and EP standards. Widely used as acidulant, chelating agent and preservative.
Citric Acid Monohydrate Chemical Properties
| Melting point | 135 °C |
| Boiling point | 56 °C760 mm Hg(lit.) |
| bulk density | 800-1000kg/m3 |
| density | 0.791 g/mL at 25 °C(lit.) |
| vapor density | 2 (vs air) |
| vapor pressure | 184 mm Hg ( 20 °C) |
| refractive index | n20/D 1.359(lit.) |
| Fp | 1 °F |
| storage temp. | no restrictions. |
| solubility | Citric Acid Monohydrate is very soluble in water, freely soluble in ethanol and sparingly soluble in ether. |
| pka | 3.138, 4.76, 6.401 |
| form | Solid |
| color | White |
| Specific Gravity | 0.810 (20/4℃) |
| Odor | Typical, practically odorless |
| PH | 1.85 (50g/l, H2O, 25℃) |
| Water Solubility | 1630 g/L (20 oC) ;H2O: soluble 54% (w/w) at 10°C (Citric acid in water) |
| Sensitive | Hygroscopic |
| Merck | 14,2326 |
| BRN | 4018641 |
| Stability: | Stable. Incompatible with oxidizing agents, bases, reducing agents, nitrates. |
| InChIKey | YASYEJJMZJALEJ-UHFFFAOYSA-N |
| CAS DataBase Reference | 5949-29-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Citric acid monohydrate(5949-29-1) |
| EPA Substance Registry System | 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, hydrate (1:1) (5949-29-1) |
Safety Information
| Hazard Codes | F,Xi |
| Risk Statements | 11-36-66-67-41-36/37/38-37/38 |
| Safety Statements | 9-16-26-37/39-36/37/39-36 |
| RIDADR | UN 1090 3/PG 2 |
| WGK Germany | 1 |
| RTECS | AL3150000 |
| TSCA | Yes |
| HS Code | 29181400 |
| Toxicity | LD50 orally in Rabbit: 3000 mg/kg |
Product Application of Citric Acid Monohydrate CAS#5949-29-1
Citric Acid Monohydrate is a widely used organic acid across the food, beverage, pharmaceutical, personal care and industrial sectors. In food and beverage applications, it functions as an acidulant, flavour modifier and preservative aid to adjust tartness, improve flavour balance and help extend shelf life. In pharmaceutical formulations, it serves as a pH regulator, buffering agent and chelating agent for tablets, syrups and effervescent preparations.
It is also used in personal care and cleaning products for pH adjustment and metal ion sequestration. In industrial applications, it can be used as a water treatment additive, metal cleaning agent and, in certain cases, a concrete retarder. This versatile raw material can be compounded with other ingredients and is valued by manufacturers for its stable quality and reliable performance.
