ARSENIC(III) CHLORIDE
ARSENIC(III) CHLORIDE
CAS: 7784-34-1
Molecular Formula: AsCl3
ARSENIC(III) CHLORIDE - Names and Identifiers
ARSENIC(III) CHLORIDE - Physico-chemical Properties
| Molecular Formula | AsCl3 |
| Molar Mass | 181.28 |
| Density | 2.15g/mLat 25°C(lit.) |
| Melting Point | −16°C(lit.) |
| Boling Point | 130.2°C(lit.) |
| Flash Point | 130.2°C |
| Water Solubility | Decomposes in water with formation of As(OH)3 and HCl. Increasing dilutions in water result in As2O3 precipitation |
| Vapor Density | 6.25 |
| Appearance | Liquid |
| Color | Colorless to yellow-brown |
| Merck | 14,801 |
| Stability | Stability Reacts with water. Corrodes many metals. Reacts violently on contact with potassium, sodium and aluminium. |
| Sensitive | Moisture Sensitive |
| Refractive Index | 1.6006 (589.3 nm 20℃ |
| Physical and Chemical Properties | Oily liquid or needle-like crystals. Melting point -8.5 ℃, boiling point 130.2 ℃. Relative density of liquid d202.163. Soluble in ethanol, ether, hydrobromic acid, hydrochloric acid, phosphorus trichloride. Can dissolve sulfur, phosphorus, grease, etc. Smoke in the air. In water, it decomposes to produce arsenic hydroxide and hydrogen chloride, which is very irritating with the formation of white smoke. In case of ultraviolet rays, it will decompose. Because of its fat solubility, when it is stained on the mucous membrane and skin, it will penetrate into the tissue and cause hydrolysis. Highly toxic! |
ARSENIC(III) CHLORIDE - Risk and Safety
| Risk Codes | R23/25 - Toxic by inhalation and if swallowed. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S20/21 - S28 - After contact with skin, wash immediately with plenty of soap-suds. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 1560 6.1/PG 1 |
| WGK Germany | 3 |
| RTECS | CG1750000 |
| TSCA | Yes |
| HS Code | 28121044 |
| Hazard Class | 6.1 |
| Packing Group | I |
| Toxicity | cyt-hmn:leu 600 nmol/L MUREAV 88,73,81 |
ARSENIC(III) CHLORIDE - References
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | toxicity is arsenous acid type, very irritating. Due to fat-soluble, when stained on the mucous membrane and skin, there is a danger of penetration into the tissue and hydrolysis. Special attention should be paid not to splash into the eyes, and wear protective masks and thick rubber gloves to protect the mucous membrane and skin. The allowable concentration in air is 0.2 mg/m3 (as). The lethal dose of mice was 2500mg/m3 after 10 min. Work must wear overalls, rubber aprons, rubber gloves, and personal protective masks. The production equipment should be airtight and the work site should be well ventilated. |
| use | high purity products are used as semiconductors. Used as dopant gas. It is used to synthesize chlorine derivatives containing arsenic. Used in ceramic industry. |
| production method | can be produced by reacting arsenic trioxide with concentrated hydrochloric acid, or by reacting arsenic with dry chlorine. The hydrochloric acid method adds arsenic trioxide to the stirred reactor, then adds concentrated hydrochloric acid, and slowly adds concentrated sulfuric acid dropwise under stirring. Due to the dripping of concentrated sulfuric acid. The water produced by the reaction is removed, and the resulting arsenic trichloride sinks to the bottom of the reactor due to two-phase separation. After the concentrated sulfuric acid drops, the reactor is heated for distillation. Fractions of 90~107 ℃ were collected. The distillate is cooled, and since it is divided into arsenic trichloride liquid layer (lower layer) and HCl layer (upper layer), arsenic trichloride is separated by a separatory funnel. The finished product of arsenic trichloride is produced. Its As2O3 6HCl → 2AsC13 3H2O |
| category | corroded articles |
| toxicity classification | highly toxic |
| acute toxicity | inhalation-mouse LCL0: 338 PPM/ 10 minutes; Inhalation-cat LCL0: 100 mg/m3/1 hour |
| flammability hazard characteristics | toxic arsenic oxychloride and hydrogen chloride gases are released when exposed to water; combustible; combustion produces toxic chloride and arsenide fumes |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from alkalis and food additives |
| fire extinguishing agent | dry sand and dry stone powder; No water |
| occupational standard | TWA 0.01 mg (arsenic)/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
