Selenium disulfide

  • Selenium sulfide
Formula
SeS2
Structure
Description
Brown red-yellow. Faint odor.
Uses
Medicine (treatment of seborrhea, medicated shampoos).

Registry Numbers and Inventories.
CAS
7488-56-4
EC (EINECS/ELINCS)
231-303-8
RTECS
VS8925000
RTECS class
Mutagen
UN (DOT)
2657
Beilstein/Gmelin
1612 (G)
RCRA
U205
EPA OPP
72003
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
S2Se
Formula mass
143.08
Melting point, °C
-249.5
Boiling point, °C
-112
Vapor pressure, mmHg
29 (-148 C)
Critical pressure
54.6
Density
0.03 g/cm3 (-65 C)
Solubility in water
Insoluble

Hazards and Protection.
Storage
All containers of selenium or its compounds should be stored in a dry, preferably cool room. Do not store near noncompatible materials such as acids or oxidizing agents.
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 clothing.
Respirators
Wear positive pressure self-contained breathing apparatus.
Small spills/leaks
If you should spill this chemical, use absorbent paper to pick up all liquid spill material. Seal the absorbent paper, as well as any of your clothing which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Wash any surfaces you may have contaminated with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Stability
No data.
Incompatibilities
May react vigorously with acids to release hydrogen sulfide gas May react with oxidizing agents, including inorganic oxoacids, organic peroxides and epoxides.
Decomposition
When heated to decomposition, it emits very toxic fumes of sulfur oxides and selenium.

Fire.
Fire fighting
Fires involving this compound can be extinguished using a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
May burn but does not ignite readily.
Hazards
When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
NIOSH REL*: TWA 0.2 mg/m3 OSHA PEL*: TWA 0.2 mg/m3 [*Note: REL and PEL also apply to other selenium compounds (as Se) except Selenium hexafluoride.] IDLH 1 mg/m3 (as Se)
Exposure effects
Dizziness, decreased reflexes, CNS depression, and coma have been reported.
   Ingestion
Gastrointestinal effects are generally the first symptoms seen. Acute effects may include: vomiting, hypersalivation, diarrhea, abdominal pain, a burning sensation in the nostrils and/or oral mucosa, chemical burns of the alimentary tract and a garlic-like odor on the breath.
   Inhalation
Pulmonary edema and cardiopulmonary arrest are possible.
   Skin
Dermatitis and nasal irritation may be present.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
2657
Response guide
Hazard class
6.1
Packing Group
II
 
Std. Transport #
4923383