Citric acid CAS#77-92-9
Natural Component: Anhydrous citric acid is a naturally occurring substance and an intermediate product in the physiological metabolism of both animals and plants.
Wide Applications: It is one of the most widely used organic acids in the food, pharmaceutical, and chemical industries due to its versatility.
Physical Properties: The product is a colorless, transparent or translucent crystal, which can also exist as granular or microparticle powder. It is odorless with a strong, pleasant sour taste and a slightly astringent aftertaste.
Environmental Sensitivity: Anhydrous citric acid gradually weathers in warm air and is slightly deliquescent in humid environments, indicating its sensitivity to moisture.
Product Description of Citric Acid (CAS# 77-92-9)
Anhydrous citric acid is a naturally occurring compound and an intermediate product in the physiological metabolism of both animals and plants. It is one of the most widely used organic acids in the food, pharmaceutical, and chemical industries. This product appears as a colorless, transparent or translucent crystal, and can also be found in granular or microparticle powder form. It is odorless with a strong sour taste, yet pleasant, leaving a slightly astringent aftertaste. Anhydrous citric acid is prone to gradual weathering in warm air and is slightly deliquescent in humid conditions.
Parameters
| Melting point | 153-159 °C (lit.) |
| Boiling point | 248.08°C (rough estimate) |
| density | 1.67 g/cm3 at 20 °C |
| bulk density | 560kg/m3 |
| vapor density | 7.26 (vs air) |
| vapor pressure | <0.1 hPa (20 °C) |
| refractive index | 1.493~1.509 |
| FEMA | 2306 | CITRIC ACID |
| Fp | 100 °C |
| storage temp. | 2-8°C |
| solubility | Citric acid also dissolves in absolute (anhydrous) ethanol (76 parts of citric acid per 100 parts of ethanol) at 15 °C. |
| form | grit |
| pka | 3.14(at 20℃) |
| color | White |
| PH | 3.24(1 mM solution);2.62(10 mM solution);2.08(100 mM solution); |
| Odor | Odorless |
| biological source | synthetic |
| Odor Type | odorless |
| explosive limit | 8%, 65°F |
| soluble in Water (1174g/L at 10°C, 1809g/L at 30°C, 3825g/L at 80°C). | |
| Sensitive | Hygroscopic |
| λmax | λ: 260 nm Amax: 0.20 |
| λ: 280 nm Amax: 0.10 | |
| Merck | 142,326 |
| JECFA Numbr | 218 |
| BRN | 782061 |
| Stability: | Stable. Incompatible with bases, strong oxidizing agents, reducing agents, metal nitrates. |
| InChIKey | KRKNYBCHXYNGOX-UHFFFAOYSA-N |
| LogP | -1.64 |
| CAS DataBase Reference | 77-92-9(CAS DataBase Reference) |
| NIST Chemisty Reference | 1,2,3-Propanetricarboxylic acid, 2-hydroxy-(77-92-9) |
| EPA Substance Registry System | Citric acid (77-92-9) |
Safety Information
| Hazard Codes | Xi,C,T |
| Risk Statements | 41-36/37/38-36/38-37/38-34-36-35-61-60 |
| Safety Statements | 26-39-37/39-24/25-36/37/39-45-36-53 |
| RIDADR | UN 1789 8/PG 3 |
| WGK Germany | 1 |
| RTECS | GE7350000 |
| F | 9 |
| TSCA | Yes |
| HS Code | 2918 14 00 |
| Hazardous Substances Data | 77-92-9(Hazardous Substances Data) |
| Toxicity | LD50 in mice, rats (mmol/kg): 5.0, 4.6 i.p. (Gruber, Halbeisen) |
Product Application of Citric Acid (CAS# 77-92-9)
Acidity regulator; proteomics; flavors and fragrances; organic acids; food additives; additives; Chinese medicine reference substances; analytical standards; plant extracts; acidulants; citric acid monohydrate; organic chemical raw materials; Chinese Pharmacopoeia test solution; organic raw materials; flavoring agents.
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