Seleno-(DL)-cysteine

  • DL-Selenocysteine
Formula
C3H7NO2Se
Structure
Uses
Chemopreventive agent

Registry Numbers and Inventories.
CAS
18312-66-8
RTECS
AY7600000
RTECS class
Other
UN (DOT)
3283
Beilstein/Gmelin
2498377
RCRA
D010

Properties.
Formula
C3H7NO2Se
Formula mass
168.07
Boiling point, °C
115 (32 torr)

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 personal protective clothing to prevent skin contact. Facilities for quickly drenching the body should be provided within the immediate work area for emergency use where there is a possibility of exposure.
Respirators
Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive pressure-mode. Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive-pressure mode.
Small spills/leaks
Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
No data.
Incompatibilities
Avoid contact with acids, strong oxidizers, chromium trioxide, potassium bromate, cadmium. Selenium

Fire.
Fire fighting
Use method most appropriate to fight surrounding fire.
Fire potential
Non-Combustible
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
IDHL: 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
Administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents. Besides supportive treatment, there is no specific treatment for this rare type of human poisoning. Ascorbic acid and edta are of no or equivocal use, and bromobenzene may be dangerous.
   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.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
3283
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
SEC