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| CAS No.: | 7791-23-3 |
|---|---|
| Name: | SELENIUM OXYCHLORIDE |
| Article Data: | 54 |
| Molecular Structure: | |
|
|
|
| Formula: | Cl2O Se |
| Molecular Weight: | 165.865 |
| Synonyms: | Seleniumoxychloride (6CI); Dichlorooxoselenium; Seleninyl dichloride; Selenium chlorideoxide (SeCl2O); Selenium dichloride oxide; Selenium oxychloride (SeOCl2);Selenium oxydichloride; Selenyl dichloride (SeOCl2) |
| EINECS: | 232-244-0 |
| Density: | 2.43 g/mL at 25 °C(lit.) |
| Melting Point: | 9 °C |
| Boiling Point: | 180 °C(lit.) |
| Flash Point: | 176.4°C |
| Solubility: | reacts with water |
| Appearance: | yellow to orange liq. |
| Hazard Symbols: |
 T N
|
| Risk Codes: | 14-23/25-33-35-50/53 |
| Safety: | Poison by skin contact and subcutaneous routes. Human systemic effects by skin contact with very small amounts: primary irritant, corrosive. Explodes on contact with potassium, white phosphorus. Ignites on contact with antimony. Vigorous reaction with metal oxides (e.g., silver oxide, lead(II) oxide, lead(IV) oxide, lead(II)(IV) oxide). When heated to decomposition it emits very toxic fumes of Cl− and Se. See also SELENIUM COMPOUNDS and CHLORIDES. |
| Transport Information: | UN 2879 8 |
| PSA: | 17.07000 |
| LogP: | 0.87940 |
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Chemistry
IUPAC Name: Selenium oxydichloride
The MF of Selenium oxydichloride (CAS NO.7791-23-3) is Cl2OSe.
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The MW of Selenium oxydichloride (CAS NO.7791-23-3) is 165.87.
Synonyms of Selenium oxydichloride (CAS NO.7791-23-3): Seleninyl dichloride ; Selenium chloride oxide ; Selenium oxychloride
Product Categories: Inorganics
Apperance: colourless to light yellow liquid
Stability: Stable, but reacts with water and moisture
Solubility: Decomposes in water
Sensitive: Moisture Sensitive
Refraction Index: 1.651
Boiling Point: 180 °C
Melting Point: 8.5 °C
Flash Point: 176.4 °C
EINECS: 232-244-0
Merck: 14,8435
Uses
Selenium oxydichloride (CAS NO.7791-23-3) is used occasionally as a polar solvent for synthetic phenolic resins, which resembles DMSO as a donor solvent.
Production
Selenium oxydichloride can be prepared by several methods:
1. by passing chlorine gas into a suspension of selenium dioxide in carbon tetrachloride.
2. by heating thionyl chloride, SOCl2, with selenium dioxide.
3. by dehydration of dichloroselenious acid, H2Se(Cl2)O2
4. by fusion of selenium dioxide, selenium and calcium chloride.
Toxicity Data With Reference
| 1. | skn-man TDLo:710 µg/kg | PHRPA6 Public Health Reports. 53 (1938),94. | ||
| 2. | skn-rbt LDLo:2 mg/kg | CTOXAO Clinical Toxicology. 17 (1980),171. | ||
| 3. | scu-rbt LD50:7 mg/kg | CTOXAO Clinical Toxicology. 17 (1980),171. |
Consensus Reports
Selenium and its compounds are on the Community Right-To-Know List. EPA Extremely Hazardous Substances List. Reported in EPA TSCA Inventory.
Safety Profile
Poison by skin contact and subcutaneous routes. Human systemic effects by skin contact with very small amounts: primary irritant, corrosive. Explodes on contact with potassium, white phosphorus. Ignites on contact with antimony. Vigorous reaction with metal oxides (e.g., silver oxide, lead(II) oxide, lead(IV) oxide, lead(II)(IV) oxide). When heated to decomposition it emits very toxic fumes of Cl− and Se. See also SELENIUM COMPOUNDS and CHLORIDES.Safety information of Selenium oxydichloride (CAS NO.7791-23-3):
Hazard Codes 
T,
N
Risk Statements
14 Reacts violently with water
23/25 Toxic by inhalation and if swallowed
33 Danger of cumulative effects
35 Causes severe burns
50/53 Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Safety Statements
26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36/37/39 Wear suitable protective clothing, gloves and eye/face protection
45 In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
60 This material and/or its container must be disposed of as hazardous waste
61 Avoid release to the environment. Refer to special instructions safety data sheet
RIDADR UN 2879 8/PG 1
WGK Germany 3
RTECS VS7000000
HazardClass 8
PackingGroup I
Standards and Recommendations
OSHA PEL: TWA 0.2 mg(Se)/m3
ACGIH TLV: TWA 0.2 mg(Se)/m3
DFG MAK: 0.1 mg(Se)/m3
DOT Classification: 8; Label: Corrosive, Poison
Specification
Selenium oxydichloride is the chemical compound SeOCl2, a close chemical relative of thionyl chloride, SOCl2.