Selenium oxychloride

  • Seleninyl chloride
Formula
SeOCl2
Structure
Description
A colorless to light-colored liquid.
Uses
Chlorinating agent & resin plasticizer used in the chemical industry.

Registry Numbers and Inventories.
CAS
7791-23-3
EC (EINECS/ELINCS)
232-244-0
RTECS
VS7000000
RTECS class
Human Data
UN (DOT)
2879
Merck
12,8578
Beilstein/Gmelin
25854 (G)
RCRA
D010
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
Korea ECL
Listed

Properties.
Formula
Cl2OSe
Formula mass
165.86
Melting point, °C
8.5
Boiling point, °C
178
Vapor pressure, mmHg
0.05
Vapor density (air=1)
5.7
Critical temperature
457
Density
2.44 g/cm3 (20 C)
Solubility in water
Decomposes
Refractive index
1.651 (20 C)
Heat of fusion
4.2 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate chemical protective gloves, boots, and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Use water spray to knock-down vapors.
Stability
No data.
Incompatibilities
Reacts in the cold with SELENIUM OXYCHLORIDE evolving light and heat; white phosphorus
Decomposition
When heated to decomposition, emits very toxic fumes of hydrogen chloride and selenium.

Fire.
Fire fighting
Cool containers that are exposed to flames with water until well after the fire is out. Stay upwind; keep out of low areas. Wear positive pressure breathing apparatus and special protective clothing.Use dry chemical, carbon dioxide, water spray, or foam for small fires; use water spray, fog, or foam for large fires.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
When this material is heated to decomposition, or in contact with acids or acid fumes, highly toxic chloride and selenium fumes are evolved. Hydrochloric acid and selenious acid are produced by reaction with water. Decomposed by water. Reacts violently with powdered antimony, red and white phosphorus, disilver oxide, lead oxides, and potassium. Avoid water, moist air.
Combustion products
Toxic gases and vapors may be released in a fire involving selenium oxychloride.
Health
3
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure limit(s)
TLV (as Se): ppm; 0.2 mg/m3 (ACGIH 199?-199?).
Exposure effects
Rapid breathing, fever, initial elevated blood pressure followed by abnormally low blood pressure and shock, and rapid heart rate may be noted. CNS depression or coma may occur following selenious acid ingestion, inhalation, or dermal exposure. Seizures may occur. Restlessness was noted on presentation in a nonfatal case.
   Ingestion
See Inhalation.
   Inhalation
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns, or death.
   Skin
See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Do not induce emesis. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.
   Inhalation
Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
2879
Response guide
Hazard class
8
Packing Group
I
 
USCG CHRIS Code
SEL
 
Std. Transport #
4936307