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Trichloroacetic acid CAS# 76-03-9
CAS Number: 76-03-9
Chemical Formula: C2HCl3O2
Synonyms:
TCA
Deblock trichloroacetic acid solution
Appearance: Colorless crystals
HS Code: 29154000
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Products Description of Trichloroacetic acid CAS# 76-03-9
Trichloroacetic acid is referred to as TCA. It is a colorless or white orthorhombic crystal. It is highly deliquescent. It has a slight special pungent smell. It is highly corrosive. The relative molecular mass is 163.40. The relative density is 1.6298 (61°C). The melting point is 57-58°C. The boiling point is 197.5°C, 141-142°C (3.333×103Pa). The heat of combustion is 3.0kJ. The refractive index is 1.4603 (61°C). The vapor pressure is 0.133×10Chemicalbook3Pa (51°C). It is easily soluble in water, and its aqueous solution is acidic (0.1 mol aqueous solution pH 1.2). It is soluble in ethanol and ether. Its solubility at 25°C is: 1306 in water, 2143 in methanol, and 617 in ether. Its aqueous solution below 30% slowly decomposes into chloroform, hydrogen chloride, carbon dioxide, carbon monoxide, etc. It hydrolyzes into chloroform and carbon dioxide in dilute alkaline solution and generates formic acid in concentrated alkaline solution. It decomposes into chloroform and carbonate when reacting with strong alkali.
Parameters
| Melting point | 54-58 °C (lit.) |
| Boiling point | 196 °C (lit.) |
| density | 1.62 g/mL at 25 °C (lit.) |
| bulk density | 900kg/m3 |
| vapor density | <1 (vs air) |
| vapor pressure | 1 mm Hg ( 51 °C) |
| refractive index | n |
| Fp | 196°C |
| storage temp. | Store at +15°C to +25°C. |
| solubility | H2O: 0.5 M at 20 °C, clear, colorless |
| pka | 0.7(at 25℃) |
| form | Solid |
| color | White |
| Odor | sharp, pungent odor |
| PH | <1.0 (25℃, 0.5M in H2O) |
| Water Solubility | 120 g/100 mL (20 ºC) |
| Sensitive | Hygroscopic |
| λmax | 210nm(EtOH)(lit.) |
| Merck | 14,9627 |
| BRN | 970119 |
| Exposure limits | ACGIH: TWA 0.5 ppm NIOSH: TWA 1 ppm(7 mg/m3) |
| Dielectric constant | 4.9（20℃） |
| Stability: | Stable, but moisture sensitive. Incompatible with water, strong bases. Note that the Merck Index states that this material is hydrolytically unstable in aqueous solution below 30% by weight. Decomposition products include carbon monoxide and carbon dioxide. The generation of these gases in a sealed container may lead to a pressure rise sufficien |
| LogP | 1.330 |
| CAS DataBase Reference | 76-03-9(CAS DataBase Reference) |
| NIST Chemistry Reference | Acetic acid, trichloro-(76-03-9) |
| IARC | 2B (Vol. 63, 84, 106) 2014 |
| EPA Substance Registry System | Trichloroacetic acid (76-03-9) |
Safety Information
| Hazard Codes | Xn,N,C,F,Xi |
| Risk Statements | 36/37/38-40-51/53-50/53-35-38-11-34-67-52/53 |
| Safety Statements | 26-36/37-61-60-45-36/37/39-24/25-16 |
| OEB | B |
| OEL | TWA: 1 ppm (7 mg/m3) |
| RIDADR | UN 1839 8/PG 2 |
| WGK Germany | 2 |
| RTECS | AJ7875000 |
| F | 10-21 |
| Autoignition Temperature | 711 °C |
| Hazard Note | Corrosive/Hygroscopic |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | II |
| HS Code | 29154000 |
| Hazardous Substances Data | 76-03-9(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 5000 mg/kg (Bailey, White) |
Product Application of Trichloroacetic acid CAS# 76-03-9
It is used as an extractant for adenosine triphosphate, cytochrome c and placental lipopolysaccharide and a protein precipitant. It is also used as a pesticide herbicide and a raw material for organic synthesis.
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