IUPAC Name: Trichlorosamarium
The MF of Samarium(III) chloride (CAS NO.10361-82-7) is Cl₃Sm.

                                        
The MW of Samarium(III) chloride (CAS NO.10361-82-7) is 256.72.
Synonyms of Samarium(III) chloride (CAS NO.10361-82-7): Samarium (III) chloride hexahydrate ; Samarium trichloride ; Samarium(III) chloride
Product Categories: Inorganics;Catalysis and Inorganic Chemistry;Chemical Synthesis;Crystal Grade Inorganics;Salts;Samarium Salts
Apperance: off-white powder
EINECS: 233-797-0
Melting Point: 678 °C
Density: 4.46 g/mL
Sensitive: Hygroscopic
Merck: 14,8347

 Samarium(III) chloride (CAS NO.10361-82-7) is used for the preparation of samarium metal (which has a variety of uses, notably in magnets). Anhydrous SmCl₃ is mixed with sodium chloride or calcium chloride to lower the melting point, then it is melted and electrolysed to give the free metal. The anhydrous chloride may also be used to prepare organometallic compounds of samarium, such as bis(pentamethylcyclopentadienyl)alkylsamarium(III) complexes used as catalysts for hydrogenation and hydrosilylation of alkenes. Samarium(III) chloride can also be used as a starting point for the preparation of other samarium salts.

It can be prepared as a yellow aqueous solution by reaction of either samarium metal or samarium(III) carbonate and hydrochloric acid. The anhydrous halide may alternatively be prepared from samarium metal and hydrogen chloride.

2 Sm(s) + 6 HCl(aq) → 2 SmCl₃(aq) + 3 H₂(g)

Sm₂(CO₃)₃(s) + 6 HCl(aq) → 2 SmCl₃(aq) + 3 CO₂(g) + 3 H₂O(l)

Anhydrous SmCl₃ can be made by dehydration of the hydrate either by slowly heating to 400 °C with 4-6 equivalents of ammonium chloride under high vacuum, or by heating with an excess of thionyl chloride for five hours. The anhydrous halide may alternatively be prepared from samarium metal and hydrogen chloride^[6]. It is usually purified by high temperature sublimation under high vacuum.

1.		skn-rbt 500 mg MOD		BJPCAL    British Journal of Pharmacology and Chemotherapy. 17 (1961),526.
2.		eye-rbt 1 mg/1H MLD		BJPCAL    British Journal of Pharmacology and Chemotherapy. 17 (1961),526.
3.		orl-rat LD50:3073 mg/kg		GISAAA    Gigiena i Sanitariya. 58 (1)(1993),24.
4.		ipr-mus LD50:365 mg/kg		AEHLAU    Archives of Environmental Health. 5 (1962),437.
5.		scu-gpg LD50:703 mg/kg		EQSSDX    Environmental Quality and Safety, Supplement. 1 (1975),1.
6.		scu-frg LD50:256 mg/kg		EQSSDX    Environmental Quality and Safety, Supplement. 1 (1975),1.

Reported in EPA TSCA Inventory.

Poison by intraperitoneal and subcutaneous routes. Moderately toxic by ingestion. A skin and eye irritant. When heated to decomposition it emits toxic fumes of Cl⁻. See also SAMARIUM and RARE EARTHS.Safety information of Samarium(III) chloride (CAS NO.10361-82-7):
Hazard Codes  Xi
Risk Statements 
38 Irritating to the skin
Safety Statements 
36 Wear suitable protective clothing
WGK Germany  2
RTECS  VP2625000

 Samarium trichloride is a compound of samarium and chlorine. It is a pale yellow solid which rapidly absorbs water on exposure to moist air to form a hexahydrate, SmCl₃.6H₂O. Simple rapid heating of the hydrate alone may cause small amounts of hydrolysis. The first five moles of water are lost at 110 °C