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 abbreviated as TCA. It is a colorless or white orthorhombic crystal, highly deliquescent, with a faint special pungent odor and strong corrosiveness.
Its relative molecular mass is 163.40, relative density is 1.6298 (at 61°C), melting point is 57–58°C, and boiling point is 197.5°C (or 141–142°C under 3.333×10³Pa). The heat of combustion is 3.0kJ, refractive index is 1.4603 (at 61°C), and vapor pressure is 0.133×10³Pa (at 51°C).It is easily soluble in water, and its aqueous solution is acidic (the pH of a 0.1 mol/L aqueous solution is 1.2). It is also soluble in ethanol and ether. Its solubility at 25°C is 1306 (in water), 2143 (in methanol), and 617 (in ether).Aqueous solutions with a concentration below 30% decompose slowly into chloroform, hydrogen chloride, carbon dioxide, carbon monoxide, and other substances. It hydrolyzes into chloroform and carbon dioxide in dilute alkaline solutions, and generates formic acid in concentrated alkaline solutions. When reacting with strong alkalis, it decomposes into chloroform and carbonate.
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 | n20/D 1.62(lit.) |
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 |
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 employed as an extractant for adenosine triphosphate, cytochrome c, and placental lipopolysaccharide, alongside being a protein precipitant. It is further utilized as a pesticidal herbicide and a key raw material for organic synthesis processes.
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