Stibine

  • Antimony hydride
  • Hydrogen antimonide
Formula
SbH3
Structure
Description
A colorless gas with a disagreeable odor.
Uses
Has been used as fumigating agent.

Registry Numbers and Inventories.
CAS
7803-52-3
RTECS
WJ0700000
RTECS class
Other
UN (DOT)
2676
Merck
12,8965
Beilstein/Gmelin
795 (G)
Swiss Giftliste 1
G-1140

Properties.
Formula
H3Sb
Formula mass
124.78
Melting point, °C
-88
Boiling point, °C
-17
Vapor pressure, mmHg
459.2 (243.6 C)
Vapor density (air=1)
4.4
Density
2.15 g/cm3 (0 C)
Solubility in water
Slightly soluble
Heat of fusion
3.40 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 protective gloves, clothing and goggles -- as recommended by the manufacturer. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
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. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.
Stability
Decomposes slowly on standing @ room temperature; thermally less stable than arsine.
Incompatibilities
Avoid contact with acids, halogenated hydrocarbons, oxidizers, moisture, chlorine, ozone, ammonia. Explosive reaction with ammonia plus heat; chlorine; concentrated nitric acid; and ozone. Stibine and concentrated nitric acid explode.

Fire.
Fire fighting
Do not extinguish fire unless flow can be stopped. Do not apply water to point of leak in tank car or container. Use water in flooding quantities as fog. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use foam, dry chemical, or carbon dioxide.
Fire potential
Flammable when exposed to heat or flame.
Hazards
Flammable; may be ignited by heat, sparks or flames. May form explosive mixtures with air. May polymerize explosively when heated or involved in a fire. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Some of these materials may react violently with water. Containers may explode when heated. Ruptured cylinders may rocket. Runoff may create fire or explosion hazard.
Combustion products
When heated to decomp, it emits toxic fumes of antimony.
Health
4
 
Flammability
4
 
 
Reactivity
2
 

Health.
Exposure limit(s)
TLV: 0.1 ppm; 0.51 mg/m3 (as TWA) (ACGIH 1997). MAK: 0.1 ppm; 0.5 mg/m3; (1996) OSHA PEL: TWA 0.1 ppm (0.5 mg/m3) NIOSH REL: TWA 0.1 ppm (0.5 mg/m3) NIOSH IDLH: 5 ppm
Poison_Class
1
Exposure effects
Effects similar to those encountered in shock have been suggested effects. The pulse may be weak and irregular. Dyspnea and/or slowed respirations may be present. Severe headache is a common early symptom of stibine poisoning. Seizures may develop in severe exposures.
   Ingestion
Nausea and abdominal pain are common.
   Inhalation
Pulmonary irritation is a possible effect based principally on results in animal studies.
   Skin
May be toxic/fatal if absorbed through skin. Contact may cause burns, severe injury and/or frostbite.
   Eyes
Contact may cause burns, severe injury and/or frostbite.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   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
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
UN number
2676
Response guide
Hazard class
2.3
PRTC
T
USCG CHRIS Code
ATW
 
Std. Transport #
4920167