Molecular Formula | Cl3Rh |
Molar Mass | 209.26 |
Density | 5.38 |
Melting Point | 450 °C |
Boling Point | 717 °C (730 mmHg) |
Water Solubility | Insoluble in water. Soluble in hydroxide and cyanide solutions. |
Appearance | Powder |
Color | Red-brown |
Exposure Limit | ACGIH: TWA 1 mg/m3NIOSH: IDLH 100 mg/m3; TWA 0.1 mg/m3 |
Merck | 14,8188 |
Storage Condition | Inert atmosphere,Room Temperature |
Stability | hygroscopic |
Sensitive | Hygroscopic |
Physical and Chemical Properties | Red-brown powder. Soluble in alkaline hydroxide or cyanide solutions; insoluble in neutral or acidic media. Exposure limit covers soluble salts of rhodium. |
Hazard Symbols | Xn - Harmful |
Risk Codes | R22 - Harmful if swallowed R41 - Risk of serious damage to eyes |
Safety Description | S36/39 - S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S24 - Avoid contact with skin. S24/25 - Avoid contact with skin and eyes. |
WGK Germany | 3 |
RTECS | VI9275000 |
FLUKA BRAND F CODES | 21 |
TSCA | Yes |
HS Code | 28439000 |
Hazard Class | 8 |
Toxicity | LD50 in rats (mg/kg): 198 i.v. (Landolt) |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Overview | Rhodium chloride, also known as rhodium trichloride, is a red-brown powder, easy deliquescence. Toxic! Molecular weight 209.26 (anhydrous), melting point 450~500 C (decomposition). Boiling point 800 °c (sublimation). To 600 deg C above the formation of multi fluoride. 70 C can be reduced by hydrogen. Insoluble in water, acid, aqua regia, soluble in methanol and cyanide solution. In concentrated acid (nitric acid, sulfuric acid) heat decomposition. When heated with sodium, aluminum, magnesium, iron and other metals. Production method: 400~600 deg C, with rhodium and chlorine or rhodium oxide and hydrogen chloride obtained. Used in electronics, instrumentation, metallurgy and other industries, but also for electroplating operations, the preparation of catalysts. Fig.1 Rhodium chloride powder |
invasive route | inhalation, ingestion, contact with skin and eyes. |
adverse effects and toxic symptoms | This product can cause mild eye irritation. LD50 of rhodium trichloride by one intravenous injection: 198mg/kg for male rats and 215mg/kg for male rabbits. Shortly after the administration, the animal's lethargy was gradually aggravated, the respiration was gradually weakened, the body weight was slightly decreased, and the rapid death occurred. There was no substantial change in the histological examination of the internal organs of the surviving and dead rabbits, it is suggested that death may be due to central nervous system involvement. (2016-01-13) |
first aid | this chemical, such as touching the eyes and skin, rinsed with water, inhaled in large quantities, immediately removed from the scene; if swallowed, take a large amount of saline, inducing Vomit. |
Protection Measure | wear work clothes when operating. Wear protective glasses. If the work clothes are contaminated, they should be taken off. |
medical monitoring | before employment and regular medical examination, pay attention to the inspection of the invasion site. |
determination method | determination in air: a sample was collected with a filter material, treated with acid, and analyzed by atomic absorption spectrometry. |
proposed waste disposal methods | in view of its high economic value, where possible, for recycling and reuse. |